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

   1 /*
   2  * Copyright (c) 2011, 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
  19 #include "util.h"
  20 #include "sys.h"
  21 #include "wm.h"
  22
  23 #ifndef MODKEY
  24 #define MODKEY alt
  25 #endif
  26 #ifndef MARGIN
  27 #define MARGIN 0
  28 #endif
  29 #ifndef STACK
  30 #define STACK  25
  31 #endif
  32
  33 /* Enums */
  34 typedef enum {
  35         none, move, resize
  36 } drag_t;
  37
  38 typedef enum {
  39         split, stack, max, tab
  40 } mode_t;
  41
  42 typedef enum {
  43         tiling, floating
  44 } layer_t;
  45
  46 /* Window structure types */
  47 struct win_wm { };
  48
  49 typedef struct {
  50         win_t  *win;     // the window
  51         int     height;  // win height in _this_ tag
  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         mode_t  mode;    // display mode
  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 } flt_t;
  65
  66 typedef struct {
  67         list_t *cols;    // of col_t
  68         col_t  *col;     // focused col
  69         list_t *flts;    // of flt_t
  70         flt_t  *flt;     // focused flt
  71         layer_t layer;   // focused layer
  72         win_t  *geom;    // display size and position
  73 } dpy_t;
  74
  75 typedef struct {
  76         list_t *dpys;    // of dpy_t
  77         dpy_t  *dpy;     // focused dpy
  78         int     name;    // tag name
  79 } tag_t;
  80
  81 typedef struct {
  82         list_t *tags;    // of tag_t
  83         tag_t  *tag;     // focused tag
  84         win_t  *root;    // root/background window
  85         list_t *screens; // display geometry
  86 } wm_t;
  87
  88 #define WIN(node) ((win_t*)(node)->data)
  89 #define ROW(node) ((row_t*)(node)->data)
  90 #define COL(node) ((col_t*)(node)->data)
  91 #define FLT(node) ((flt_t*)(node)->data)
  92 #define DPY(node) ((dpy_t*)(node)->data)
  93 #define TAG(node) ((tag_t*)(node)->data)
  94
  95 #define tag_foreach_col(tag, dpy, col, row, win) \
  96         for (list_t *dpy =     tag ->dpys; dpy; dpy = dpy->next) \
  97         for (list_t *col = DPY(dpy)->cols; col; col = col->next) \
  98         for (list_t *row = COL(col)->rows; row; row = row->next) \
  99         for (win_t  *win = ROW(row)->win;  win; win = NULL)
 100
 101 #define tag_foreach_flt(tag, dpy, flt, win) \
 102         for (list_t *dpy =     tag ->dpys; dpy; dpy = dpy->next) \
 103         for (list_t *flt = DPY(dpy)->flts; flt; flt = flt->next) \
 104         for (win_t  *win = FLT(flt)->win;  win; win = NULL)      \
 105
 106 /* Window management data
 107  *   wm_* macros represent the currently focused item
 108  *   _only_ wm_focus protects against NULL pointers */
 109 static wm_t *wm;
 110 #define wm_tag   wm->tag
 111 #define wm_dpy   wm->tag->dpy
 112 #define wm_col   wm->tag->dpy->col
 113 #define wm_row   wm->tag->dpy->col->row
 114 #define wm_flt   wm->tag->dpy->flt
 115 #define wm_focus get_focus()
 116
 117 /* Mouse drag data */
 118 static drag_t  move_mode;
 119 static list_t *move_lrow;
 120 static list_t *move_lcol;
 121 static list_t *move_lflt;
 122 static ptr_t   move_prev;
 123 static layer_t move_layer;
 124 static struct { int v, h; } move_dir;
 125
 126 /********************
 127  * Helper functions *
 128  ********************/
 129 static win_t *get_focus(void)
 130 {
 131         if (!wm_tag || !wm_dpy)
 132                 return NULL;
 133         switch (wm_dpy->layer) {
 134         case tiling:
 135                 return wm_col && wm_row ? wm_row->win : NULL;
 136         case floating:
 137                 return wm_flt ? wm_flt->win : NULL;
 138         }
 139         return NULL;
 140 }
 141
 142 /* Search for the target window in a given tag
 143  * win may exist in other tags as well */
 144 static int searchl(tag_t *tag, win_t *target,
 145                 list_t **_dpy, list_t **_col, list_t **_row, list_t **_flt)
 146 {
 147         tag_foreach_col(tag, dpy, col, row, win) {
 148                 if (win == target) {
 149                         if (_dpy) *_dpy = dpy;
 150                         if (_col) *_col = col;
 151                         if (_row) *_row = row;
 152                         return tiling;
 153                 }
 154         }
 155         tag_foreach_flt(tag, dpy, flt, win) {
 156                 if (win == target) {
 157                         if (_dpy) *_dpy = dpy;
 158                         if (_flt) *_flt = flt;
 159                         return floating;
 160                 }
 161         }
 162         return -1;
 163 }
 164
 165 static int search(tag_t *tag, win_t *target,
 166                 dpy_t **_dpy, col_t **_col, row_t **_row, flt_t **_flt)
 167 {
 168         list_t *dpy, *col, *row, *flt;
 169         switch (searchl(tag, target, &dpy, &col, &row, &flt)) {
 170         case tiling:
 171                 if (_dpy) *_dpy = DPY(dpy);
 172                 if (_col) *_col = COL(col);
 173                 if (_row) *_row = ROW(row);
 174                 return tiling;
 175         case floating:
 176                 if (_dpy) *_dpy = DPY(dpy);
 177                 if (_flt) *_flt = FLT(flt);
 178                 return floating;
 179         }
 180         return -1;
 181 }
 182
 183 /* Set the mode for the windows column in the current tag */
 184 static void set_mode(win_t *win, mode_t mode)
 185 {
 186         col_t *col;
 187         if (tiling != search(wm_tag, win, NULL, &col, NULL, NULL))
 188                 return;
 189         printf("set_mode: %p, %d -> %d\n",
 190                         col, col->mode, mode);
 191         col->mode = mode;
 192         if (col->mode == split)
 193                 for (list_t *cur = col->rows; cur; cur = cur->next) {
 194                         row_t *row = cur->data;
 195                         row->height = wm_dpy->geom->h;
 196                 }
 197         wm_update();
 198 }
 199
 200 /* Focus the window in the current tag and record
 201  * it as the currently focused window */
 202 static void set_focus(win_t *win)
 203 {
 204         if (win == NULL || win == wm->root) {
 205                 sys_focus(wm->root);
 206                 return;
 207         }
 208
 209         /* - Only grab mouse button on unfocused window,
 210          *   this prevents stealing all mouse clicks from client windows,
 211          * - A better way may be to re-send mouse clicks to client windows
 212          *   using the return value from wm_handle_key */
 213         for (int i = key_mouse1; i < key_mouse7; i++) {
 214                 if (wm_focus)
 215                         sys_watch(wm_focus, i, MOD());
 216                 sys_unwatch(win, i, MOD());
 217         }
 218
 219         dpy_t *dpy; col_t *col; row_t *row; flt_t *flt;
 220         switch (search(wm_tag, win, &dpy, &col, &row, &flt)) {
 221         case tiling:
 222                 wm_dpy = dpy;
 223                 wm_col = col;
 224                 wm_row = row;
 225                 dpy->layer = tiling;
 226                 break;
 227         case floating:
 228                 wm_dpy = dpy;
 229                 wm_flt = flt;
 230                 dpy->layer = floating;
 231                 break;
 232         }
 233         sys_focus(win);
 234 }
 235
 236 /* Save mouse start location when moving/resizing windows */
 237 static void set_move(win_t *win, ptr_t ptr, drag_t drag)
 238 {
 239         printf("set_move: %d - %p@%d,%d\n",
 240                         drag, win, ptr.rx, ptr.ry);
 241         move_mode = drag;
 242         if (drag == move || drag == resize) {
 243                 move_layer = searchl(wm_tag, win, NULL,
 244                                 &move_lcol, &move_lrow, &move_lflt);
 245                 if (move_layer < 0)
 246                         return;
 247                 move_prev = ptr;
 248                 int midy = win->y + (win->h/2);
 249                 int midx = win->x + (win->w/2);
 250                 move_dir.v = ptr.ry < midy ? -1 : +1;
 251                 move_dir.h = ptr.rx < midx ? -1 : +1;
 252         }
 253 }
 254
 255 /* Print a text representation of the window layout
 256  * Quite useful for debugging */
 257 static void print_txt(void)
 258 {
 259         for (list_t *ltag = wm->tags; ltag; ltag = ltag->next) {
 260                 tag_t *tag = ltag->data;
 261                 printf("tag:       <%-9p [%p->%p] >%-9p d=%-9p - %d\n",
 262                                 ltag->prev, ltag, ltag->data, ltag->next,
 263                                 tag->dpy, tag->name);
 264         for (list_t *ldpy = tag->dpys; ldpy; ldpy = ldpy->next) {
 265                 dpy_t *dpy  = ldpy->data;
 266                 win_t *geom = dpy->geom;
 267                 printf("  dpy:     <%-9p [%p->%p] >%-9p %c=%-9p - %d,%d %dx%d\n",
 268                                 ldpy->prev, ldpy, ldpy->data, ldpy->next,
 269                                 dpy->layer == tiling   ? 'c' : 'f',
 270                                 dpy->layer == tiling   ? (void*)dpy->col : (void*)dpy->flt,
 271                                 geom->x, geom->y, geom->h, geom->w);
 272         for (list_t *lcol = dpy->cols; lcol; lcol = lcol->next) {
 273                 col_t *col = lcol->data;
 274                 printf("    col:   <%-9p [%p->%p] >%-9p r=%-9p - %dpx @ %d\n",
 275                                 lcol->prev, lcol, lcol->data, lcol->next,
 276                                 col->row, col->width, col->mode);
 277         for (list_t *lrow = col->rows; lrow; lrow = lrow->next) {
 278                 row_t *row = lrow->data;
 279                 win_t *win = row->win;
 280                 printf("      win: <%-9p [%p>>%p] >%-9p focus=%d%d    - %4dpx \n",
 281                                 lrow->prev, lrow, win, lrow->next,
 282                                 col->row == row, wm_focus == win, win->h);
 283         } }
 284         for (list_t *lflt = dpy->flts; lflt; lflt = lflt->next) {
 285                 flt_t *flt = lflt->data;
 286                 printf("    flt:   <%-9p [%p->%p] >%-9p focus=%d%d    - %d,%d %dx%d \n",
 287                                 lflt->prev, lflt, lflt->data, lflt->next,
 288                                 dpy->flt == flt, wm_focus == flt->win,
 289                                 flt->x, flt->y, flt->h, flt->w);
 290         }  } }
 291 }
 292
 293 /* Cleanly remove a window from a tag
 294  *   Determines the new focused row/col
 295  *   Prunes empty lists */
 296 static layer_t cut_win(win_t *win, tag_t *tag)
 297 {
 298         list_t *ldpy, *lcol, *lrow, *lflt;
 299         layer_t layer = searchl(tag, win, &ldpy, &lcol, &lrow, &lflt);
 300
 301         dpy_t  *dpy   = DPY(ldpy);
 302         if (layer == tiling) {
 303                 col_t  *col  = COL(lcol);
 304                 col->row  = lrow->prev ? lrow->prev->data :
 305                             lrow->next ? lrow->next->data : NULL;
 306                 col->rows = list_remove(col->rows, lrow);
 307                 if (col->rows == NULL && (lcol->next || lcol->prev)) {
 308                         dpy->col  = lcol->prev ? lcol->prev->data :
 309                                     lcol->next ? lcol->next->data : NULL;
 310                         dpy->cols = list_remove(dpy->cols, lcol);
 311                 }
 312         }
 313
 314         if (layer == floating) {
 315                 dpy->flts = list_remove(dpy->flts, lflt);
 316                 dpy->flt  = dpy->flts ? list_last(dpy->flts)->data : NULL;
 317                 if (!dpy->flt && dpy->col && dpy->col->row)
 318                         dpy->layer = tiling;
 319         }
 320
 321         return layer;
 322 }
 323
 324 /* Insert a window into the tiling layer
 325  *   The window is added immediately after the
 326  *   columns currently focused row */
 327 static void put_win_col(win_t *win, tag_t *tag, dpy_t *dpy, col_t *col)
 328 {
 329         row_t *row = new0(row_t);
 330         row->win = win;
 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         if (dpy->flt) {
 366                 flt->x = dpy->flt->x + 20;
 367                 flt->y = dpy->flt->y + 20;
 368         }
 369         dpy->flts = list_append(dpy->flts, flt);
 370         tag->dpy        = dpy;
 371         tag->dpy->flt   = flt;
 372         tag->dpy->layer = floating;
 373 }
 374
 375 /* Insert a window into a tag */
 376 static void put_win(win_t *win, tag_t *tag, layer_t layer)
 377 {
 378         if (layer == tiling)
 379                 put_win_col(win, tag, tag->dpy, tag->dpy->col);
 380         if (layer == floating)
 381                 put_win_flt(win, tag, tag->dpy);
 382 }
 383
 384 /* Move a window up, down, left, or right
 385  *   This handles moving with a column, between
 386  *   columns, and between multiple monitors. */
 387 static void shift_window(win_t *win, int col, int row)
 388 {
 389         if (!win) return;
 390         printf("shift_window: %p - %+d,%+d\n", win, col, row);
 391         print_txt();
 392         printf("shift_window: >>>\n");
 393         list_t *ldpy, *lcol, *lrow, *lflt;
 394         if (tiling != searchl(wm_tag, win, &ldpy, &lcol, &lrow, &lflt))
 395                 return;
 396         dpy_t *dpy = ldpy->data;
 397         if (row != 0) {
 398                 /* Move with a column, just swap rows */
 399                 list_t *src = lrow, *dst = NULL;
 400                 if (row < 0) dst = src->prev;
 401                 if (row > 0) dst = src->next;
 402                 if (src && dst) {
 403                         printf("swap: %p <-> %p\n", src->data, dst->data);
 404                         row_t *tmp = src->data;
 405                         src->data = dst->data;
 406                         dst->data = tmp;
 407                         goto update;
 408                 }
 409         } else {
 410                 /* Moving between columns */
 411                 int onlyrow = !lrow->prev && !lrow->next;
 412                 list_t *src = lcol, *dst = NULL;
 413                 if (col < 0) {
 414                         if (src->prev) {
 415                                 /* Normal move between columns */
 416                                 dst = src->prev;
 417                         } else if (!onlyrow) {
 418                                 /* Create new column */
 419                                 dpy->cols = list_insert(dpy->cols, new0(col_t));
 420                                 dst = src->prev;
 421                         } else if (ldpy->prev) {
 422                                 /* Move to next monitor */
 423                                 dpy = ldpy->prev->data;
 424                                 dst = list_last(dpy->cols);
 425                         } else {
 426                                 /* We, shall, not, be,
 427                                  * we shall not be moved */
 428                                 return;
 429                         }
 430                 }
 431                 if (col > 0) {
 432                         if (src->next) {
 433                                 dst = src->next;
 434                         } else if (!onlyrow) {
 435                                 dpy->cols = list_append(dpy->cols, new0(col_t));
 436                                 dst = src->next;
 437                         } else if (ldpy->next) {
 438                                 dpy = ldpy->next->data;
 439                                 dst = dpy->cols;
 440                         } else {
 441                                 return;
 442                         }
 443                 }
 444                 cut_win(win, wm_tag);
 445                 put_win_col(win, wm_tag, dpy, dst ? dst->data : NULL);
 446                 goto update;
 447         }
 448 update:
 449         print_txt();
 450         wm_update();
 451 }
 452
 453 /* Get next/prev item, with wraparound */
 454 static list_t *get_next(list_t *list, int forward)
 455 {
 456         list_t *next = forward ? list->next : list->prev;
 457         if (next == NULL) {
 458                 next = list;
 459                 while ((list = forward ? next->prev : next->next))
 460                         next = list;
 461         }
 462         return next;
 463 }
 464
 465 /* Move keyboard focus in a given direction */
 466 static void shift_focus(int cols, int rows)
 467 {
 468         printf("shift_focus: %+d,%+d\n", cols, rows);
 469         if (rows != 0 && wm_focus) {
 470                 /* Move focus up/down */
 471                 list_t *dpy, *col, *row;
 472                 if (tiling != searchl(wm_tag, wm_focus, &dpy, &col, &row, NULL))
 473                         return;
 474                 row_t *next = get_next(row, rows > 0)->data;
 475                 set_focus(next->win);
 476                 if (COL(col)->mode != split)
 477                         wm_update();
 478         }
 479         if (cols != 0) {
 480                 /* Move focus left/right */
 481                 list_t *dpy, *col, *row, *ndpy, *ncol = NULL;
 482                 if (wm_focus) {
 483                         /* Currently focused on a window */
 484                         if (tiling != searchl(wm_tag, wm_focus, &dpy, &col, &row, NULL))
 485                                 return;
 486                         ncol = cols > 0 ? col->next : col->prev;
 487                 } else {
 488                         /* Currently focused on an empty display */
 489                         dpy = list_find(wm_tag->dpys, wm_dpy);
 490                 }
 491                 if (ncol == NULL) {
 492                         /* Moving focus to a different display */
 493                         ndpy = get_next(dpy, cols > 0);
 494                         ncol = cols > 0 ? DPY(ndpy)->cols :
 495                                 list_last(DPY(ndpy)->cols);
 496                         wm_dpy = ndpy->data;
 497                 }
 498                 if (ncol && COL(ncol) && COL(ncol)->row)
 499                         set_focus(COL(ncol)->row->win);
 500                 else
 501                         sys_focus(wm->root);
 502         }
 503 }
 504
 505 /* Raise the window in the floating */
 506 static void raise_float(win_t *win)
 507 {
 508         printf("raise_float: %p\n", win);
 509         list_t *cur;
 510         for (cur = wm_dpy->flts; cur; cur = cur->next)
 511                 if (FLT(cur)->win == win)
 512                         break;
 513         if (cur) {
 514                 flt_t *flt = cur->data;
 515                 wm_dpy->flts = list_remove(wm_dpy->flts, cur);
 516                 wm_dpy->flts = list_append(wm_dpy->flts, flt);
 517         }
 518         sys_raise(win);
 519 }
 520
 521 /* Toggle between floating and tiling layers */
 522 static void switch_layer(void)
 523 {
 524         printf("switch_float: %p %d\n",
 525                         wm_dpy, wm_dpy->layer);
 526         wm_dpy->layer = !wm_dpy->layer;
 527         wm_update();
 528 }
 529
 530 /* Move current window between floating and tiling layers */
 531 static void set_layer(win_t *win)
 532 {
 533         if (!win) return;
 534         printf("set_float: %p %p\n", wm_dpy, win);
 535         wm_dpy->layer = !cut_win(win, wm_tag);
 536         put_win(win, wm_tag, wm_dpy->layer);
 537         wm_update();
 538 }
 539
 540 /* Allocate a new tag */
 541 static tag_t *tag_new(list_t *screens, int name)
 542 {
 543         tag_t *tag = new0(tag_t);
 544         tag->name  = name;
 545         for (list_t *cur = screens; cur; cur = cur->next) {
 546                 dpy_t *dpy  = new0(dpy_t);
 547                 dpy->geom = cur->data;
 548                 tag->dpys = list_append(tag->dpys, dpy);
 549         }
 550         tag->dpy  = tag->dpys->data;
 551         return tag;
 552 }
 553
 554 /* Search for a tag
 555  *   If it does not exist it is based on the
 556  *   display geometry in wm->screens */
 557 static tag_t *tag_find(int name)
 558 {
 559         tag_t *tag = NULL;
 560         for (list_t *cur = wm->tags; cur; cur = cur->next)
 561                 if (name == TAG(cur)->name) {
 562                         tag = cur->data;
 563                         break;
 564                 }
 565         if (!tag) {
 566                 tag = tag_new(wm->screens, name);
 567                 wm->tags = list_append(wm->tags, tag);
 568         }
 569         return tag;
 570 }
 571
 572 /* Move the window from the current tag to the new tag
 573  *   Unlike wmii, only remove the current tag, not all tags */
 574 static void tag_set(win_t *win, int name)
 575 {
 576         printf("tag_set: %p %d\n", win, name);
 577         if (wm_tag->name == name)
 578                 return;
 579         tag_t *tag = tag_find(name);
 580         layer_t layer = cut_win(win, wm_tag);
 581         put_win(win, tag, layer);
 582         set_focus(wm_focus);
 583 }
 584
 585 /* Switch to a different tag */
 586 static void tag_switch(int name)
 587 {
 588         printf("tag_switch: %d\n", name);
 589         if ((wm_col == NULL || wm_row == NULL) && wm_flt == NULL)
 590                 wm->tags = list_remove(wm->tags,
 591                                 list_find(wm->tags, wm_tag));
 592         wm_tag = tag_find(name);
 593 }
 594
 595 /* Tile all windows in the given display
 596  *   This performs all the actual window tiling
 597  *   Currently supports  split, stack and maximized modes */
 598 static void wm_update_cols(dpy_t *dpy)
 599 {
 600         int  x=0,  y=0; // Current window top-left position
 601         int tx=0, ty=0; // Total size (sum of initial col widths and row heights w/o margin)
 602         int mx=0, my=0; // Maximum usable size (screen size minus margins)
 603         int       sy=0; // Stack size (height of focused stack window)
 604
 605         /* Scale horizontally */
 606         x  = dpy->geom->x;
 607         mx = dpy->geom->w - (list_length(dpy->cols)+1)*MARGIN;
 608         for (list_t *lcol = dpy->cols; lcol; lcol = lcol->next)
 609                 tx += COL(lcol)->width;
 610         for (list_t *lcol = dpy->cols; lcol; lcol = lcol->next)
 611                 COL(lcol)->width *= (float)mx / tx;
 612
 613         /* Scale each column vertically */
 614         for (list_t *lcol = dpy->cols; lcol; lcol = lcol->next) {
 615                 col_t *col = lcol->data;
 616                 int nrows = list_length(col->rows);
 617                 ty = 0;
 618                 for (list_t *lrow = col->rows; lrow; lrow = lrow->next)
 619                         ty += ROW(lrow)->height;
 620                 y  = dpy->geom->y;
 621                 my = dpy->geom->h - (MARGIN + (nrows-1)* MARGIN    + MARGIN);
 622                 sy = dpy->geom->h - (MARGIN + (nrows-1)*(MARGIN/2) + MARGIN)
 623                                   -           (nrows-1)* STACK;
 624                 for (list_t *lrow = col->rows; lrow; lrow = lrow->next) {
 625                         win_t *win = ROW(lrow)->win;
 626                         win->h = ROW(lrow)->height;
 627                         int height = 0;
 628                         switch (col->mode) {
 629                         case split:
 630                                 sys_move(win, x+MARGIN, y+MARGIN,
 631                                         col->width, win->h * ((float)my / ty));
 632                                 height = win->h;
 633                                 y += height + MARGIN;
 634                                 break;
 635                         case stack:
 636                                 if (lrow->next && ROW(lrow->next)->win == col->row->win) {
 637                                         /* Hack to prevent flashing */
 638                                         win_t *next = ROW(lrow->next)->win;
 639                                         sys_move(next, x+MARGIN, y+MARGIN+STACK+MARGIN/2,
 640                                                 col->width, sy);
 641                                 }
 642                                 height = win == col->row->win ? sy : STACK;
 643                                 sys_move(win, x+MARGIN, y+MARGIN,
 644                                         col->width, height);
 645                                 y += height + (MARGIN/2);
 646                                 break;
 647                         case max:
 648                         case tab:
 649                                 sys_move(win, x+MARGIN, 0+MARGIN,
 650                                         col->width, dpy->geom->h-2*MARGIN);
 651                                 if (col->row->win == win)
 652                                         sys_raise(win);
 653                                 break;
 654                         }
 655                         ROW(lrow)->height = win->h;
 656                 }
 657                 x += col->width + MARGIN;
 658         }
 659 }
 660
 661 /*******************************
 662  * Window management functions *
 663  *******************************/
 664 void wm_update(void)
 665 {
 666         /* Show/hide tags */
 667         tag_foreach_col(wm_tag, dpy, col, row, win)
 668                 sys_show(win, st_show);
 669         tag_foreach_flt(wm_tag, dpy, flt, win)
 670                 sys_show(win, st_show);
 671         for (list_t *tag = wm ->tags; tag; tag = tag->next)
 672                 if (tag->data != wm_tag) {
 673                         tag_foreach_col(TAG(tag), dpy, col, row, win)
 674                                         sys_show(win, st_hide);
 675                         tag_foreach_flt(TAG(tag), dpy, flt, win)
 676                                         sys_show(win, st_hide);
 677                 }
 678
 679         /* Refresh the display */
 680         for (list_t *ldpy = wm_tag->dpys; ldpy; ldpy = ldpy->next)
 681                 wm_update_cols(ldpy->data);
 682         tag_foreach_flt(wm_tag, ldpy, lflt, win) {
 683                 flt_t *flt = lflt->data;
 684                 sys_move(win, flt->x, flt->y, flt->w, flt->h);
 685                 sys_raise(flt->win);
 686         }
 687         if (wm_focus)
 688                 set_focus(wm_focus);
 689 }
 690
 691 int wm_handle_key(win_t *win, Key_t key, mod_t mod, ptr_t ptr)
 692 {
 693         if (!win || win == wm_dpy->geom) return 0;
 694         //printf("wm_handle_key: %p - %x %c%c%c%c%c\n", win, key,
 695         //      mod.up    ? '^' : 'v',
 696         //      mod.alt   ? 'a' : '-',
 697         //      mod.ctrl  ? 'c' : '-',
 698         //      mod.shift ? 's' : '-',
 699         //      mod.win   ? 'w' : '-');
 700
 701         /* Mouse movement */
 702         if (key == key_mouse1)
 703                 raise_float(win);
 704         if (key_mouse0 <= key && key <= key_mouse7) {
 705                 if (key == key_mouse1 && mod.MODKEY && !mod.up)
 706                         return set_move(win,ptr,move),   1;
 707                 if (key == key_mouse3 && mod.MODKEY && !mod.up)
 708                         return set_move(win,ptr,resize), 1;
 709                 if (move_mode != none && mod.up)
 710                         return set_move(win,ptr,none),   1;
 711                 if (key == key_mouse1 && !mod.up && win->h == STACK)
 712                         return wm_update(),              0;
 713                 return 0;
 714         }
 715
 716         /* Only handle key-down */
 717         if (mod.up)
 718                 return 0;
 719
 720         /* Misc */
 721         if (mod.MODKEY) {
 722 #ifdef DEBUG
 723                 if (key == key_f1) return raise_float(win), 1;
 724                 if (key == key_f2) return set_focus(win), 1;
 725                 if (key == key_f3) return sys_show(win, st_show), 1;
 726                 if (key == key_f4) return sys_show(win, st_hide), 1;
 727 #endif
 728                 if (key == key_f5) return wm_update(),    1;
 729                 if (key == key_f6) return print_txt(),    1;
 730         }
 731
 732         /* Floating layer */
 733         if (key == ' ') {
 734                 if (mod.MODKEY && mod.shift)
 735                         return set_layer(win), 1;
 736                 if (mod.MODKEY)
 737                         return switch_layer(), 1;
 738         }
 739
 740         /* Movement commands */
 741         if (mod.MODKEY && mod.shift) {
 742                 switch (key) {
 743                 case 'h': return shift_window(wm_focus,-1, 0), 1;
 744                 case 'j': return shift_window(wm_focus, 0,+1), 1;
 745                 case 'k': return shift_window(wm_focus, 0,-1), 1;
 746                 case 'l': return shift_window(wm_focus,+1, 0), 1;
 747                 default: break;
 748                 }
 749         }
 750         else if (mod.MODKEY) {
 751                 switch (key) {
 752                 case 'h': return shift_focus(-1, 0), 1;
 753                 case 'j': return shift_focus( 0,+1), 1;
 754                 case 'k': return shift_focus( 0,-1), 1;
 755                 case 'l': return shift_focus(+1, 0), 1;
 756                 default: break;
 757                 }
 758         }
 759
 760         /* Column mode commands */
 761         if (mod.MODKEY) {
 762                 switch (key) {
 763                 case 'd': return set_mode(win, split), 1;
 764                 case 's': return set_mode(win, stack), 1;
 765                 case 'm': return set_mode(win, max),   1;
 766                 case 't': return set_mode(win, tab),   1;
 767                 default: break;
 768                 }
 769         }
 770
 771         /* Tag switching */
 772         if (mod.MODKEY && '0' <= key && key <= '9') {
 773                 int name = key - '0';
 774                 if (mod.shift)
 775                         tag_set(win, name);
 776                 else
 777                         tag_switch(name);
 778                 wm_update();
 779         }
 780
 781         /* Focus change */
 782         if (key == key_enter)
 783                 return set_focus(win), 1;
 784
 785         if (key_mouse0 <= key && key <= key_mouse7)
 786                 return set_focus(win), 0;
 787
 788         /* Reset focus after after focus change,
 789          * not sure what is causing the focus change in the first place
 790          * but preventing that would be a better solution */
 791         if (key == key_focus)
 792                 sys_focus(wm_focus ?: wm->root);
 793
 794         return 0;
 795 }
 796
 797 int wm_handle_ptr(win_t *cwin, ptr_t ptr)
 798 {
 799         //printf("wm_handle_ptr: %p - %d,%d %d,%d (%d) -- \n",
 800         //              cwin, ptr.x, ptr.y, ptr.rx, ptr.ry, move_mode);
 801
 802         if (move_mode == none)
 803                 return 0;
 804
 805         int dx = ptr.rx - move_prev.rx;
 806         int dy = ptr.ry - move_prev.ry;
 807         move_prev = ptr;
 808
 809         if (move_layer == tiling && move_mode == resize) {
 810                 list_t *vert = move_dir.v < 0 ? move_lrow->prev : move_lrow->next;
 811                 list_t *horz = move_dir.h < 0 ? move_lcol->prev : move_lcol->next;
 812                 if (vert) {
 813                         ROW(move_lrow)->height += move_dir.v * dy;
 814                         ROW(vert)->height      -= move_dir.v * dy;
 815                 }
 816                 if (horz) {
 817                         COL(move_lcol)->width  += move_dir.h * dx;
 818                         COL(horz)->width       -= move_dir.h * dx;
 819                 }
 820                 wm_update();
 821         }
 822
 823         if (move_layer == floating) {
 824                 flt_t *flt = move_lflt->data;
 825                 win_t *win = flt->win;
 826                 if (move_mode == move)
 827                         sys_move(win, win->x+dx, win->y+dy, win->w, win->h);
 828                 else if (move_mode == resize)
 829                         sys_move(win,
 830                                 win->x + dx * (move_dir.h < 0),
 831                                 win->y + dy * (move_dir.v < 0),
 832                                 win->w + dx *  move_dir.h,
 833                                 win->h + dy *  move_dir.v);
 834                 flt->x = win->x; flt->y = win->y;
 835                 flt->w = win->w; flt->h = win->h;
 836         }
 837
 838         return 0;
 839 }
 840
 841 void wm_insert(win_t *win)
 842 {
 843         printf("wm_insert: %p\n", win);
 844         print_txt();
 845
 846         /* Initialize window */
 847         win->wm = new0(win_wm_t);
 848         sys_watch(win, key_enter,  MOD());
 849         sys_watch(win, key_focus,  MOD());
 850
 851         /* Add to screen */
 852         put_win(win, wm_tag, wm_dpy->layer);
 853
 854         /* Arrange */
 855         wm_update();
 856         set_focus(wm_focus);
 857         print_txt();
 858 }
 859
 860 void wm_remove(win_t *win)
 861 {
 862         printf("wm_remove: %p\n", win);
 863         print_txt();
 864         for (list_t *tag = wm->tags; tag; tag = tag->next)
 865                 cut_win(win, tag->data);
 866         set_focus(wm_focus);
 867         wm_update();
 868         print_txt();
 869 }
 870 void wm_init(win_t *root)
 871 {
 872         printf("wm_init: %p\n", root);
 873
 874         /* Hack, fix screen order */
 875         list_t *screens = sys_info(root);
 876         list_t *left  = screens;
 877         list_t *right = screens->next;
 878         if (left && right && WIN(left)->x > WIN(right)->x) {
 879                 void *tmp   = left->data;
 880                 left->data  = right->data;
 881                 right->data = tmp;
 882         }
 883
 884         wm          = new0(wm_t);
 885         wm->root    = root;
 886         wm->screens = screens;
 887         wm->tag     = tag_new(wm->screens, 1);
 888         wm->tags    = list_insert(NULL, wm->tag);
 889
 890         Key_t keys_e[] = {key_enter, key_focus};
 891         Key_t keys_s[] = {'h', 'j', 'k', 'l', ' ',
 892                 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9'};
 893         Key_t keys_m[] = {'h', 'j', 'k', 'l', 'd', 's', 'm', 't', ' ',
 894                 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
 895                 key_f1, key_f2, key_f3, key_f4, key_f5, key_f6,
 896                 key_mouse1, key_mouse3};
 897         for (int i = 0; i < countof(keys_e); i++)
 898                 sys_watch(root, keys_e[i],  MOD());
 899         for (int i = 0; i < countof(keys_m); i++)
 900                 sys_watch(root, keys_m[i], MOD(.MODKEY=1));
 901         for (int i = 0; i < countof(keys_s); i++)
 902                 sys_watch(root, keys_s[i], MOD(.MODKEY=1,.shift=1));
 903 }