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 /* Prototypes */
 128 void wm_update(void);
 129
 130 /********************
 131  * Helper functions *
 132  ********************/
 133 static int sort_win(void *a, void *b)
 134 {
 135         return ((win_t*)a)->x > ((win_t*)b)->x ?  1 :
 136                ((win_t*)a)->x < ((win_t*)b)->x ? -1 : 0;
 137 }
 138
 139 static win_t *get_focus(void)
 140 {
 141         if (!wm_tag || !wm_dpy)
 142                 return NULL;
 143         switch (wm_dpy->layer) {
 144         case TILING:
 145                 return wm_col && wm_row ? wm_row->win : NULL;
 146         case FLOATING:
 147                 return wm_flt ? wm_flt->win : NULL;
 148         }
 149         return NULL;
 150 }
 151
 152 /* Search for the target window in a given tag
 153  * win may exist in other tags as well */
 154 static int searchl(tag_t *tag, win_t *target,
 155                 list_t **_dpy, list_t **_col, list_t **_row, list_t **_flt)
 156 {
 157         tag_foreach_col(tag, dpy, col, row, win) {
 158                 if (win == target) {
 159                         if (_dpy) *_dpy = dpy;
 160                         if (_col) *_col = col;
 161                         if (_row) *_row = row;
 162                         return TILING;
 163                 }
 164         }
 165         tag_foreach_flt(tag, dpy, flt, win) {
 166                 if (win == target) {
 167                         if (_dpy) *_dpy = dpy;
 168                         if (_flt) *_flt = flt;
 169                         return FLOATING;
 170                 }
 171         }
 172         return -1;
 173 }
 174
 175 static int search(tag_t *tag, win_t *target,
 176                 dpy_t **_dpy, col_t **_col, row_t **_row, flt_t **_flt)
 177 {
 178         list_t *dpy, *col, *row, *flt;
 179         switch (searchl(tag, target, &dpy, &col, &row, &flt)) {
 180         case TILING:
 181                 if (_dpy) *_dpy = DPY(dpy);
 182                 if (_col) *_col = COL(col);
 183                 if (_row) *_row = ROW(row);
 184                 return TILING;
 185         case FLOATING:
 186                 if (_dpy) *_dpy = DPY(dpy);
 187                 if (_flt) *_flt = FLT(flt);
 188                 return FLOATING;
 189         }
 190         return -1;
 191 }
 192
 193 /* Set the layout for the windows column in the current tag */
 194 static void set_mode(win_t *win, layout_t layout)
 195 {
 196         col_t *col;
 197         if (TILING != search(wm_tag, win, NULL, &col, NULL, NULL))
 198                 return;
 199         printf("set_mode: %p, %d -> %d\n",
 200                         col, col->layout, layout);
 201         col->layout = layout;
 202         if (col->layout == SPLIT)
 203                 for (list_t *cur = col->rows; cur; cur = cur->next) {
 204                         row_t *row = cur->data;
 205                         row->height = wm_dpy->geom->h;
 206                 }
 207         wm_update();
 208 }
 209
 210 /* Focus the window in the current tag and record
 211  * it as the currently focused window */
 212 static void set_focus(win_t *win)
 213 {
 214         if (win == NULL || win == wm->root) {
 215                 sys_focus(wm->root);
 216                 return;
 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 - %s\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->layout);
 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("      row: <%-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                 win_t *win = flt->win;
 287                 printf("    flt:   <%-9p [%p>>%p] >%-9p focus=%d%d    - %d,%d %dx%d \n",
 288                                 lflt->prev, lflt, win, lflt->next,
 289                                 dpy->flt == flt, wm_focus == flt->win,
 290                                 flt->x, flt->y, flt->h, flt->w);
 291         }  } }
 292 }
 293
 294 /* Cleanly remove a window from a tag
 295  *   Determines the new focused row/col
 296  *   Prunes empty lists */
 297 static layer_t cut_win(win_t *win, tag_t *tag)
 298 {
 299         list_t *ldpy, *lcol, *lrow, *lflt;
 300         layer_t layer = searchl(tag, win, &ldpy, &lcol, &lrow, &lflt);
 301
 302         if (layer == TILING) {
 303                 dpy_t *dpy = DPY(ldpy);
 304                 col_t *col = COL(lcol);
 305                 col->row  = lrow->prev ? lrow->prev->data :
 306                             lrow->next ? lrow->next->data : NULL;
 307                 col->rows = list_remove(col->rows, lrow, 1);
 308                 if (col->rows == NULL && (lcol->next || lcol->prev)) {
 309                         dpy->col  = lcol->prev ? lcol->prev->data :
 310                                     lcol->next ? lcol->next->data : NULL;
 311                         dpy->cols = list_remove(dpy->cols, lcol, 1);
 312                 }
 313         }
 314
 315         if (layer == FLOATING) {
 316                 dpy_t *dpy = DPY(ldpy);
 317                 dpy->flts = list_remove(dpy->flts, lflt, 1);
 318                 dpy->flt  = dpy->flts ? list_last(dpy->flts)->data : NULL;
 319                 if (!dpy->flt && dpy->col && dpy->col->row)
 320                         dpy->layer = TILING;
 321         }
 322
 323         return layer;
 324 }
 325
 326 /* Insert a window into the tiling layer
 327  *   The window is added immediately after the
 328  *   columns currently focused row */
 329 static void put_win_col(win_t *win, tag_t *tag, dpy_t *dpy, col_t *col)
 330 {
 331         row_t *row = new0(row_t);
 332         row->win   = win;
 333         row->state = win->state ?: ST_SHOW;
 334
 335         if (col == NULL) {
 336                 col = new0(col_t);
 337                 dpy->cols = list_insert(dpy->cols, col);
 338         }
 339
 340         int nrows = list_length(col->rows);
 341         if (col->row) {
 342                 list_t *prev = list_find(col->rows, col->row);
 343                 list_insert_after(prev, row);
 344         } else {
 345                 col->rows = list_insert(col->rows, row);
 346         }
 347         tag->dpy           = dpy;
 348         tag->dpy->col      = col;
 349         tag->dpy->col->row = row;
 350         tag->dpy->layer    = TILING;
 351
 352         row->height = dpy->geom->h / MAX(nrows,1);
 353         if (nrows == 0) {
 354                 int ncols = list_length(dpy->cols);
 355                 col->width = dpy->geom->w / MAX(ncols-1,1);
 356         }
 357 }
 358
 359 /* Insert a window into the floating layer */
 360 static void put_win_flt(win_t *win, tag_t *tag, dpy_t *dpy)
 361 {
 362         flt_t *flt = new0(flt_t);
 363         flt->win   = win;
 364         flt->w     = dpy->geom->w / 2;
 365         flt->h     = dpy->geom->h / 2;
 366         flt->x     = dpy->geom->x + flt->w / 2;
 367         flt->y     = dpy->geom->y + flt->h / 2;
 368         flt->state = win->state ?: ST_SHOW;
 369         if (dpy->flt) {
 370                 flt->x = dpy->flt->x + 20;
 371                 flt->y = dpy->flt->y + 20;
 372         }
 373         dpy->flts = list_append(dpy->flts, flt);
 374         tag->dpy        = dpy;
 375         tag->dpy->flt   = flt;
 376         tag->dpy->layer = FLOATING;
 377 }
 378
 379 /* Insert a window into a tag */
 380 static void put_win(win_t *win, tag_t *tag, layer_t layer)
 381 {
 382         if (layer == TILING)
 383                 put_win_col(win, tag, tag->dpy, tag->dpy->col);
 384         if (layer == FLOATING)
 385                 put_win_flt(win, tag, tag->dpy);
 386 }
 387
 388 /* Move a window up, down, left, or right
 389  *   This handles moving with a column, between
 390  *   columns, and between multiple monitors. */
 391 static void shift_window(win_t *win, int col, int row)
 392 {
 393         if (!win) return;
 394         printf("shift_window: %p - %+d,%+d\n", win, col, row);
 395         print_txt();
 396         printf("shift_window: >>>\n");
 397         list_t *ldpy, *lcol, *lrow, *lflt;
 398         if (TILING != searchl(wm_tag, win, &ldpy, &lcol, &lrow, &lflt))
 399                 return;
 400         dpy_t *dpy = ldpy->data;
 401         if (row != 0) {
 402                 /* Move with a column, just swap rows */
 403                 list_t *src = lrow, *dst = NULL;
 404                 if (row < 0) dst = src->prev;
 405                 if (row > 0) dst = src->next;
 406                 if (src && dst) {
 407                         printf("swap: %p <-> %p\n", src->data, dst->data);
 408                         row_t *tmp = src->data;
 409                         src->data = dst->data;
 410                         dst->data = tmp;
 411                         goto update;
 412                 }
 413         } else {
 414                 /* Moving between columns */
 415                 int onlyrow = !lrow->prev && !lrow->next;
 416                 list_t *src = lcol, *dst = NULL;
 417                 if (col < 0) {
 418                         if (src->prev) {
 419                                 /* Normal move between columns */
 420                                 dst = src->prev;
 421                         } else if (!onlyrow) {
 422                                 /* Create new column */
 423                                 dpy->cols = list_insert(dpy->cols, new0(col_t));
 424                                 dst = src->prev;
 425                         } else if (ldpy->prev) {
 426                                 /* Move to next monitor */
 427                                 dpy = ldpy->prev->data;
 428                                 dst = list_last(dpy->cols);
 429                         } else {
 430                                 /* We, shall, not, be,
 431                                  * we shall not be moved */
 432                                 return;
 433                         }
 434                 }
 435                 if (col > 0) {
 436                         if (src->next) {
 437                                 dst = src->next;
 438                         } else if (!onlyrow) {
 439                                 dpy->cols = list_append(dpy->cols, new0(col_t));
 440                                 dst = src->next;
 441                         } else if (ldpy->next) {
 442                                 dpy = ldpy->next->data;
 443                                 dst = dpy->cols;
 444                         } else {
 445                                 return;
 446                         }
 447                 }
 448                 cut_win(win, wm_tag);
 449                 put_win_col(win, wm_tag, dpy, dst ? dst->data : NULL);
 450                 goto update;
 451         }
 452 update:
 453         print_txt();
 454         wm_update();
 455 }
 456
 457 /* Get next/prev item, with wraparound */
 458 static list_t *get_next(list_t *list, int forward)
 459 {
 460         list_t *next = forward ? list->next : list->prev;
 461         if (next == NULL) {
 462                 next = list;
 463                 while ((list = forward ? next->prev : next->next))
 464                         next = list;
 465         }
 466         return next;
 467 }
 468
 469 /* Move keyboard focus in a given direction */
 470 static void shift_focus(int cols, int rows)
 471 {
 472         printf("shift_focus: %+d,%+d\n", cols, rows);
 473         if (rows != 0 && wm_focus) {
 474                 /* Move focus up/down */
 475                 list_t *dpy, *col, *row;
 476                 if (TILING != searchl(wm_tag, wm_focus, &dpy, &col, &row, NULL))
 477                         return;
 478                 row_t *next = get_next(row, rows > 0)->data;
 479                 set_focus(next->win);
 480                 if (COL(col)->layout != SPLIT)
 481                         wm_update();
 482         }
 483         if (cols != 0) {
 484                 /* Move focus left/right */
 485                 list_t *dpy, *col, *row, *ndpy, *ncol = NULL;
 486                 if (wm_focus) {
 487                         /* Currently focused on a window */
 488                         if (TILING != searchl(wm_tag, wm_focus, &dpy, &col, &row, NULL))
 489                                 return;
 490                         ncol = cols > 0 ? col->next : col->prev;
 491                 } else {
 492                         /* Currently focused on an empty display */
 493                         dpy = list_find(wm_tag->dpys, wm_dpy);
 494                 }
 495                 if (ncol == NULL) {
 496                         /* Moving focus to a different display */
 497                         ndpy = get_next(dpy, cols > 0);
 498                         ncol = cols > 0 ? DPY(ndpy)->cols :
 499                                 list_last(DPY(ndpy)->cols);
 500                         wm_dpy = ndpy->data;
 501                 }
 502                 if (ncol && COL(ncol) && COL(ncol)->row)
 503                         set_focus(COL(ncol)->row->win);
 504                 else
 505                         sys_focus(wm->root);
 506         }
 507 }
 508
 509 /* Raise the window in the floating */
 510 static void raise_float(win_t *win)
 511 {
 512         printf("raise_float: %p\n", win);
 513         list_t *cur;
 514         for (cur = wm_dpy->flts; cur; cur = cur->next)
 515                 if (FLT(cur)->win == win)
 516                         break;
 517         if (cur) {
 518                 flt_t *flt = cur->data;
 519                 wm_dpy->flts = list_remove(wm_dpy->flts, cur, 0);
 520                 wm_dpy->flts = list_append(wm_dpy->flts, flt);
 521                 sys_raise(win);
 522         }
 523 }
 524
 525 /* Toggle between floating and tiling layers */
 526 static void switch_layer(void)
 527 {
 528         printf("switch_float: %p %d\n",
 529                         wm_dpy, wm_dpy->layer);
 530         wm_dpy->layer = !wm_dpy->layer;
 531         wm_update();
 532 }
 533
 534 /* Move current window between floating and tiling layers */
 535 static void set_layer(win_t *win)
 536 {
 537         if (!win) return;
 538         printf("set_float: %p %p\n", wm_dpy, win);
 539         wm_dpy->layer = !cut_win(win, wm_tag);
 540         put_win(win, wm_tag, wm_dpy->layer);
 541         wm_update();
 542 }
 543
 544 /* Allocate a new tag */
 545 static tag_t *tag_new(list_t *screens, const char *name)
 546 {
 547         tag_t *tag = new0(tag_t);
 548         strncpy(tag->name, name, sizeof(tag->name));
 549         for (list_t *cur = screens; cur; cur = cur->next) {
 550                 dpy_t *dpy  = new0(dpy_t);
 551                 dpy->geom = cur->data;
 552                 tag->dpys = list_append(tag->dpys, dpy);
 553         }
 554         tag->dpy  = tag->dpys->data;
 555         for (list_t *dpy = tag->dpys; dpy; dpy = dpy->next)
 556                 if (DPY(dpy)->geom->z > tag->dpy->geom->z)
 557                         tag->dpy = dpy->data;
 558         return tag;
 559 }
 560
 561 /* Search for a tag
 562  *   If it does not exist it is based on the
 563  *   display geometry in wm->screens */
 564 static tag_t *tag_find(const char *name)
 565 {
 566         tag_t *tag = NULL;
 567         for (list_t *cur = wm->tags; cur; cur = cur->next)
 568                 if (!strcmp(name, TAG(cur)->name)) {
 569                         tag = cur->data;
 570                         break;
 571                 }
 572         if (!tag) {
 573                 tag = tag_new(wm->screens, name);
 574                 wm->tags = list_append(wm->tags, tag);
 575         }
 576         return tag;
 577 }
 578
 579 /* Move the window from the current tag to the new tag
 580  *   Unlike wmii, only remove the current tag, not all tags */
 581 static void tag_set(win_t *win, const char *name)
 582 {
 583         printf("tag_set: %p %s\n", win, name);
 584         if (!strcmp(wm_tag->name, name))
 585                 return;
 586         tag_t *tag = tag_find(name);
 587         layer_t layer = cut_win(win, wm_tag);
 588         put_win(win, tag, layer);
 589         set_focus(wm_focus);
 590 }
 591
 592 /* Switch to a different tag */
 593 static void tag_switch(const char *name)
 594 {
 595         printf("tag_switch: %s\n", name);
 596         tag_t *old = wm_tag;
 597         if ((wm_col == NULL || wm_row == NULL) && wm_flt == NULL) {
 598                 while (old->dpys) {
 599                         dpy_t *dpy = old->dpys->data;
 600                         while (dpy->cols)
 601                                 dpy->cols = list_remove(dpy->cols, dpy->cols, 1);
 602                         old->dpys = list_remove(old->dpys, old->dpys, 1);
 603                 }
 604                 list_t *ltag = list_find(wm->tags, old);
 605                 wm->tags = list_remove(wm->tags, ltag, 1);
 606         }
 607         wm_tag = tag_find(name);
 608 }
 609
 610 /* Tile all windows in the given display
 611  *   This performs all the actual window tiling
 612  *   Currently supports  split, stack and maximized modes */
 613 static void wm_update_cols(dpy_t *dpy)
 614 {
 615         int  x=0,  y=0; // Current window top-left position
 616         int tx=0, ty=0; // Total size (sum of initial col widths and row heights w/o margin)
 617         int mx=0, my=0; // Maximum usable size (screen size minus margins)
 618         int       sy=0; // Stack size (height of focused stack window)
 619
 620         /* Scale horizontally */
 621         x  = dpy->geom->x;
 622         mx = dpy->geom->w - (list_length(dpy->cols)+1)*margin;
 623         for (list_t *lcol = dpy->cols; lcol; lcol = lcol->next)
 624                 tx += COL(lcol)->width;
 625         for (list_t *lcol = dpy->cols; lcol; lcol = lcol->next)
 626                 COL(lcol)->width *= (float)mx / tx;
 627
 628         /* Scale each column vertically */
 629         win_t *focus = get_focus();
 630         for (list_t *lcol = dpy->cols; lcol; lcol = lcol->next) {
 631                 col_t *col = lcol->data;
 632                 int nrows = list_length(col->rows);
 633                 ty = 0;
 634                 for (list_t *lrow = col->rows; lrow; lrow = lrow->next)
 635                         ty += ROW(lrow)->height;
 636                 y  = dpy->geom->y;
 637                 my = dpy->geom->h - (margin + (nrows-1)* margin    + margin);
 638                 sy = dpy->geom->h - (margin + (nrows-1)*(margin/2) + margin)
 639                                   -           (nrows-1)* stack;
 640                 for (list_t *lrow = col->rows; lrow; lrow = lrow->next) {
 641                         win_t *win = ROW(lrow)->win;
 642                         if (ROW(lrow)->state != ST_SHOW) {
 643                                 sys_show(win, ROW(lrow)->state);
 644                                 continue;
 645                         }
 646                         win->h = ROW(lrow)->height;
 647                         state_t state = ST_SHOW;
 648                         int height = 0;
 649                         switch (col->layout) {
 650                         case SPLIT:
 651                                 sys_move(win, x+margin, y+margin,
 652                                         col->width, win->h * ((float)my / ty));
 653                                 height = win->h;
 654                                 y += height + margin;
 655                                 break;
 656                         case STACK:
 657                                 if (lrow->next && ROW(lrow->next)->win == col->row->win) {
 658                                         /* Hack to prevent flashing */
 659                                         win_t *next = ROW(lrow->next)->win;
 660                                         sys_move(next, x+margin, y+margin+stack+margin/2,
 661                                                 col->width, sy);
 662                                         sys_show(next, ST_SHOW);
 663                                 }
 664                                 int isfocus = win == col->row->win;
 665                                 state  = isfocus ? ST_SHOW : ST_SHADE;
 666                                 sys_show(win, state);
 667                                 sys_move(win, x+margin, y+margin, col->width, sy);
 668                                 y += (isfocus ? sy : stack) + (margin/2);
 669                                 break;
 670                         case FULL:
 671                         case TAB:
 672                                 sys_move(win, x+margin, 0+margin,
 673                                         col->width, dpy->geom->h-2*margin);
 674                                 break;
 675                         }
 676                         sys_show(win, state);
 677                         if (focus == win)
 678                                 sys_raise(win);
 679                         ROW(lrow)->height = win->h;
 680                 }
 681                 x += col->width + margin;
 682         }
 683 }
 684
 685 /* Refresh the window layout */
 686 void wm_update(void)
 687 {
 688         /* Updates window sizes */
 689         for (list_t *ldpy = wm_tag->dpys; ldpy; ldpy = ldpy->next)
 690                 wm_update_cols(ldpy->data);
 691         tag_foreach_flt(wm_tag, ldpy, lflt, win) {
 692                 flt_t *flt = lflt->data;
 693                 sys_move(win, flt->x, flt->y, flt->w, flt->h);
 694                 sys_raise(flt->win);
 695                 sys_show(flt->win, flt->state);
 696         }
 697
 698         /* Hide other tags */
 699         for (list_t *tag = wm ->tags; tag; tag = tag->next)
 700                 if (tag->data != wm_tag) {
 701                         tag_foreach_col(TAG(tag), dpy, col, row, win)
 702                                         sys_show(win, ST_HIDE);
 703                         tag_foreach_flt(TAG(tag), dpy, flt, win)
 704                                         sys_show(win, ST_HIDE);
 705                 }
 706
 707         /* Set focused window */
 708         if (wm_focus)
 709                 set_focus(wm_focus);
 710 }
 711
 712 /*******************************
 713  * Window management functions *
 714  *******************************/
 715 int wm_handle_event(win_t *win, event_t ev, mod_t mod, ptr_t ptr)
 716 {
 717         if (!win || win == wm_dpy->geom) return 0;
 718         //printf("wm_handle_event: %p - %x %c%c%c%c%c\n", win, ev,
 719         //      mod.up    ? '^' : 'v',
 720         //      mod.alt   ? 'a' : '-',
 721         //      mod.ctrl  ? 'c' : '-',
 722         //      mod.shift ? 's' : '-',
 723         //      mod.win   ? 'w' : '-');
 724
 725         /* Mouse events */
 726         if (EV_MOUSE0 <= ev && ev <= EV_MOUSE7) {
 727                 if (ev == EV_MOUSE1 && !mod.MODKEY && !mod.up)
 728                         return raise_float(win),         0;
 729                 if ((ev == EV_MOUSE3 && mod.MODKEY && !mod.up) ||
 730                     (ev == EV_MOUSE1 && mod.MODKEY && !mod.up && mod.shift))
 731                         return set_move(win,ptr,RESIZE), 1;
 732                 if (ev == EV_MOUSE1 && mod.MODKEY && !mod.up)
 733                         return set_move(win,ptr,MOVE),   1;
 734                 if (move_mode != NONE && mod.up)
 735                         return set_move(win,ptr,NONE),   1;
 736                 if (ev == EV_MOUSE1 && !mod.up && win->state == ST_SHADE)
 737                         return set_focus(win), wm_update(), 0;
 738                 return 0;
 739         }
 740
 741         /* Only handle key-down */
 742         if (mod.up)
 743                 return 0;
 744
 745         /* Misc */
 746         if (mod.MODKEY) {
 747 #ifdef DEBUG
 748                 if (ev == EV_F1) return raise_float(win), 1;
 749                 if (ev == EV_F2) return set_focus(win), 1;
 750                 if (ev == EV_F3) return sys_show(win, ST_SHOW),  1;
 751                 if (ev == EV_F4) return sys_show(win, ST_HIDE),  1;
 752                 if (ev == EV_F7) return sys_show(win, ST_SHADE), 1;
 753 #endif
 754                 if (ev == EV_F5) return wm_update(),    1;
 755                 if (ev == EV_F6) return print_txt(),    1;
 756                 if (ev == 'q')   return sys_exit(),     1;
 757                 if (ev == 'f')   return wm_handle_state(win, win->state,
 758                         win->state == ST_FULL ? ST_SHOW : ST_FULL);
 759                 if (ev == 'g')   return wm_handle_state(win, win->state,
 760                         win->state == ST_MAX  ? ST_SHOW : ST_MAX);
 761         }
 762         if (mod.MODKEY && mod.shift) {
 763                 if (ev == 'c')   return sys_show(win, ST_CLOSE), 1;
 764         }
 765
 766         /* Floating layer */
 767         if (ev == ' ') {
 768                 if (mod.MODKEY && mod.shift)
 769                         return set_layer(win), 1;
 770                 if (mod.MODKEY)
 771                         return switch_layer(), 1;
 772         }
 773
 774         /* Movement commands */
 775         if (mod.MODKEY && mod.shift) {
 776                 switch (ev) {
 777                 case 'h': return shift_window(wm_focus,-1, 0), 1;
 778                 case 'j': return shift_window(wm_focus, 0,+1), 1;
 779                 case 'k': return shift_window(wm_focus, 0,-1), 1;
 780                 case 'l': return shift_window(wm_focus,+1, 0), 1;
 781                 default: break;
 782                 }
 783         }
 784         else if (mod.MODKEY) {
 785                 switch (ev) {
 786                 case 'h': return shift_focus(-1, 0), 1;
 787                 case 'j': return shift_focus( 0,+1), 1;
 788                 case 'k': return shift_focus( 0,-1), 1;
 789                 case 'l': return shift_focus(+1, 0), 1;
 790                 default: break;
 791                 }
 792         }
 793
 794         /* Column layout commands */
 795         if (mod.MODKEY) {
 796                 switch (ev) {
 797                 case 'd': return set_mode(win, SPLIT), 1;
 798                 case 's': return set_mode(win, STACK), 1;
 799                 case 'm': return set_mode(win, FULL),  1;
 800                 case 't': return set_mode(win, TAB),   1;
 801                 default: break;
 802                 }
 803         }
 804
 805         /* Tag switching */
 806         if (mod.MODKEY && '0' <= ev && ev <= '9') {
 807                 char name[] = {ev, '\0'};
 808                 if (mod.shift)
 809                         tag_set(win, name);
 810                 else
 811                         tag_switch(name);
 812                 wm_update();
 813         }
 814
 815         /* Focus change */
 816         if (ev == EV_ENTER && win->state != ST_SHADE)
 817                 return set_focus(win), 1;
 818
 819         /* Reset focus after after focus change,
 820          * not sure what is causing the focus change in the first place
 821          * but preventing that would be a better solution */
 822         if (ev == EV_FOCUS)
 823                 sys_focus(wm_focus ?: wm->root);
 824
 825         return 0;
 826 }
 827
 828 int wm_handle_ptr(win_t *cwin, ptr_t ptr)
 829 {
 830         //printf("wm_handle_ptr: %p - %d,%d %d,%d (%d) -- \n",
 831         //              cwin, ptr.x, ptr.y, ptr.rx, ptr.ry, move_mode);
 832
 833         if (move_mode == NONE)
 834                 return 0;
 835
 836         int dx = ptr.rx - move_prev.rx;
 837         int dy = ptr.ry - move_prev.ry;
 838         move_prev = ptr;
 839
 840         if (move_layer == TILING && move_mode == RESIZE) {
 841                 list_t *vert = move_dir.v < 0 ? move_lrow->prev : move_lrow->next;
 842                 list_t *horz = move_dir.h < 0 ? move_lcol->prev : move_lcol->next;
 843                 if (vert) {
 844                         ROW(move_lrow)->height += move_dir.v * dy;
 845                         ROW(vert)->height      -= move_dir.v * dy;
 846                 }
 847                 if (horz) {
 848                         COL(move_lcol)->width  += move_dir.h * dx;
 849                         COL(horz)->width       -= move_dir.h * dx;
 850                 }
 851                 wm_update();
 852         }
 853
 854         if (move_layer == FLOATING) {
 855                 flt_t *flt = move_lflt->data;
 856                 win_t *win = flt->win;
 857                 if (move_mode == MOVE)
 858                         sys_move(win, win->x+dx, win->y+dy, win->w, win->h);
 859                 else if (move_mode == RESIZE)
 860                         sys_move(win,
 861                                 win->x + dx * (move_dir.h < 0),
 862                                 win->y + dy * (move_dir.v < 0),
 863                                 win->w + dx *  move_dir.h,
 864                                 win->h + dy *  move_dir.v);
 865                 flt->x = win->x; flt->y = win->y;
 866                 flt->w = win->w; flt->h = win->h;
 867         }
 868
 869         return 0;
 870 }
 871
 872 int wm_handle_state(win_t *win, state_t prev, state_t next)
 873 {
 874         row_t *row = NULL;
 875         flt_t *flt = NULL;
 876
 877         printf("wm_handle_state - %p %x -> %x\n", win, prev, next);
 878
 879         search(wm_tag, win, NULL, NULL, &row, &flt);
 880
 881         if (!row && !flt && next == ST_SHOW)
 882                 return wm_insert(win), 1;
 883         if ((row || flt) && next == ST_HIDE)
 884                 return wm_remove(win), 1;
 885
 886         if (row) row->state = next;
 887         if (flt) flt->state = next;
 888
 889         if (prev == ST_MAX || prev == ST_FULL ||
 890             next == ST_MAX || next == ST_FULL)
 891                 wm_update();
 892
 893         return 1;
 894 }
 895
 896 void wm_insert(win_t *win)
 897 {
 898         printf("wm_insert: %p\n", win);
 899         print_txt();
 900
 901         /* Check for toolbars */
 902         if (win->type == TYPE_TOOLBAR)
 903                 return wm_update();
 904
 905         /* Initialize window */
 906         sys_watch(win, EV_ENTER, MOD());
 907         sys_watch(win, EV_FOCUS, MOD());
 908
 909         /* Add to screen */
 910         if (win->type == TYPE_DIALOG || win->parent)
 911                 wm_dpy->layer = FLOATING;
 912         put_win(win, wm_tag, wm_dpy->layer);
 913
 914         /* Arrange */
 915         wm_update();
 916         set_focus(win);
 917         print_txt();
 918 }
 919
 920 void wm_remove(win_t *win)
 921 {
 922         printf("wm_remove: %p\n", win);
 923         print_txt();
 924         if (win->type == TYPE_TOOLBAR)
 925                 return wm_update();
 926         for (list_t *tag = wm->tags; tag; tag = tag->next)
 927                 cut_win(win, tag->data);
 928         set_focus(wm_focus);
 929         wm_update();
 930         print_txt();
 931 }
 932
 933 void wm_init(win_t *root)
 934 {
 935         printf("wm_init: %p\n", root);
 936
 937         /* Load configuration */
 938         margin = conf_get_int("main.margin", margin);
 939         stack  = conf_get_int("main.stack",  stack);
 940
 941         wm          = new0(wm_t);
 942         wm->root    = root;
 943         wm->screens = list_sort(sys_info(root), 0, sort_win);
 944         wm->tag     = tag_new(wm->screens, "1");
 945         wm->tags    = list_insert(NULL, wm->tag);
 946
 947         event_t ev_e[] = {EV_ENTER, EV_FOCUS};
 948         event_t ev_s[] = {'h', 'j', 'k', 'l', 'c', 'q', ' ',
 949                 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
 950                 EV_MOUSE1, EV_MOUSE3};
 951         event_t ev_m[] = {'h', 'j', 'k', 'l', 'd', 's', 'm', 't', 'f', 'g', ' ',
 952                 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
 953                 EV_F1, EV_F2, EV_F3, EV_F4,  EV_F5,  EV_F6,
 954                 EV_F7, EV_F8, EV_F9, EV_F10, EV_F11, EV_F12,
 955                 EV_MOUSE1, EV_MOUSE3};
 956         for (int i = 0; i < countof(ev_e); i++)
 957                 sys_watch(root, ev_e[i],  MOD());
 958         for (int i = 0; i < countof(ev_m); i++)
 959                 sys_watch(root, ev_m[i], MOD(.MODKEY=1));
 960         for (int i = 0; i < countof(ev_s); i++)
 961                 sys_watch(root, ev_s[i], MOD(.MODKEY=1,.shift=1));
 962 }
 963
 964 void wm_free(win_t *root)
 965 {
 966         /* Re-show and free all windows */
 967         while ( wm->tags) { tag_t *tag =  wm->tags->data;
 968         while (tag->dpys) { dpy_t *dpy = tag->dpys->data;
 969         while (dpy->cols) { col_t *col = dpy->cols->data;
 970         while (col->rows) { row_t *row = col->rows->data;
 971                 sys_show(row->win, ST_SHOW);
 972         col->rows = list_remove(col->rows, col->rows, 1); }
 973         dpy->cols = list_remove(dpy->cols, dpy->cols, 1); }
 974         while (dpy->flts) { flt_t *flt = dpy->flts->data;
 975                 sys_show(flt->win, ST_SHOW);
 976         dpy->flts = list_remove(dpy->flts, dpy->flts, 1); }
 977         tag->dpys = list_remove(tag->dpys, tag->dpys, 1); }
 978          wm->tags = list_remove( wm->tags,  wm->tags, 1); }
 979
 980         /* Free remaining data */
 981         free(wm);
 982 }