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 "types.h"
  23 #include "sys.h"
  24 #include "wm.h"
  25
  26 /* Configuration */
  27 #ifndef MODKEY
  28 #define MODKEY alt
  29 #endif
  30 static int margin = 0;
  31 static int stack  = 25;
  32
  33 /* Enums */
  34 typedef enum {
  35         NONE, MOVE, RESIZE
  36 } drag_t;
  37
  38 typedef enum {
  39         SPLIT, STACK, FULL, TAB
  40 } layout_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         state_t  state;    // state of window
  53 } row_t;
  54
  55 typedef struct {
  56         list_t  *rows;     // of row_t
  57         row_t   *row;      // focused row
  58         int      width;    // column width
  59         layout_t layout;   // column layout
  60 } col_t;
  61
  62 typedef struct {
  63         win_t   *win;      // the window
  64         int x, y, w, h;    // position of window (in this tag)
  65         state_t  state;    // state of window
  66 } flt_t;
  67
  68 typedef struct {
  69         list_t  *cols;     // of col_t
  70         col_t   *col;      // focused col
  71         list_t  *flts;     // of flt_t
  72         flt_t   *flt;      // focused flt
  73         layer_t  layer;    // focused layer
  74         win_t   *geom;     // display size and position
  75 } dpy_t;
  76
  77 typedef struct {
  78         list_t  *dpys;     // of dpy_t
  79         dpy_t   *dpy;      // focused dpy
  80         char     name[64]; // tag name
  81 } tag_t;
  82
  83 typedef struct {
  84         list_t  *tags;     // of tag_t
  85         tag_t   *tag;      // focused tag
  86         win_t   *root;     // root/background window
  87         list_t  *screens;  // display geometry
  88 } wm_t;
  89
  90 #define WIN(node) ((win_t*)(node)->data)
  91 #define ROW(node) ((row_t*)(node)->data)
  92 #define COL(node) ((col_t*)(node)->data)
  93 #define FLT(node) ((flt_t*)(node)->data)
  94 #define DPY(node) ((dpy_t*)(node)->data)
  95 #define TAG(node) ((tag_t*)(node)->data)
  96
  97 #define tag_foreach_col(tag, dpy, col, row, win) \
  98         for (list_t *dpy =     tag ->dpys; dpy; dpy = dpy->next) \
  99         for (list_t *col = DPY(dpy)->cols; col; col = col->next) \
 100         for (list_t *row = COL(col)->rows; row; row = row->next) \
 101         for (win_t  *win = ROW(row)->win;  win; win = NULL)
 102
 103 #define tag_foreach_flt(tag, dpy, flt, win) \
 104         for (list_t *dpy =     tag ->dpys; dpy; dpy = dpy->next) \
 105         for (list_t *flt = DPY(dpy)->flts; flt; flt = flt->next) \
 106         for (win_t  *win = FLT(flt)->win;  win; win = NULL)      \
 107
 108 /* Window management data
 109  *   wm_* macros represent the currently focused item
 110  *   _only_ wm_focus protects against NULL pointers */
 111 static wm_t *wm;
 112 #define wm_tag   wm->tag
 113 #define wm_dpy   wm->tag->dpy
 114 #define wm_col   wm->tag->dpy->col
 115 #define wm_row   wm->tag->dpy->col->row
 116 #define wm_flt   wm->tag->dpy->flt
 117 #define wm_focus get_focus()
 118
 119 /* Mouse drag data */
 120 static drag_t  move_mode;
 121 static list_t *move_lrow;
 122 static list_t *move_lcol;
 123 static list_t *move_lflt;
 124 static ptr_t   move_prev;
 125 static layer_t move_layer;
 126 static struct { int v, h; } move_dir;
 127
 128 /* Prototypes */
 129 void wm_update(void);
 130
 131 /********************
 132  * Helper functions *
 133  ********************/
 134 static int sort_win(void *a, void *b)
 135 {
 136         return ((win_t*)a)->x > ((win_t*)b)->x ?  1 :
 137                ((win_t*)a)->x < ((win_t*)b)->x ? -1 : 0;
 138 }
 139
 140 static win_t *get_focus(void)
 141 {
 142         if (!wm_tag || !wm_dpy)
 143                 return NULL;
 144         switch (wm_dpy->layer) {
 145         case TILING:
 146                 return wm_col && wm_row ? wm_row->win : NULL;
 147         case FLOATING:
 148                 return wm_flt ? wm_flt->win : NULL;
 149         }
 150         return NULL;
 151 }
 152
 153 /* Search for the target window in a given tag
 154  * win may exist in other tags as well */
 155 static int searchl(tag_t *tag, win_t *target,
 156                 list_t **_dpy, list_t **_col, list_t **_row, list_t **_flt)
 157 {
 158         tag_foreach_col(tag, dpy, col, row, win) {
 159                 if (win == target) {
 160                         if (_dpy) *_dpy = dpy;
 161                         if (_col) *_col = col;
 162                         if (_row) *_row = row;
 163                         return TILING;
 164                 }
 165         }
 166         tag_foreach_flt(tag, dpy, flt, win) {
 167                 if (win == target) {
 168                         if (_dpy) *_dpy = dpy;
 169                         if (_flt) *_flt = flt;
 170                         return FLOATING;
 171                 }
 172         }
 173         return -1;
 174 }
 175
 176 static int search(tag_t *tag, win_t *target,
 177                 dpy_t **_dpy, col_t **_col, row_t **_row, flt_t **_flt)
 178 {
 179         list_t *dpy, *col, *row, *flt;
 180         switch (searchl(tag, target, &dpy, &col, &row, &flt)) {
 181         case TILING:
 182                 if (_dpy) *_dpy = DPY(dpy);
 183                 if (_col) *_col = COL(col);
 184                 if (_row) *_row = ROW(row);
 185                 return TILING;
 186         case FLOATING:
 187                 if (_dpy) *_dpy = DPY(dpy);
 188                 if (_flt) *_flt = FLT(flt);
 189                 return FLOATING;
 190         }
 191         return -1;
 192 }
 193
 194 /* Set the layout for the windows column in the current tag */
 195 static void set_mode(win_t *win, layout_t layout)
 196 {
 197         col_t *col;
 198         if (TILING != search(wm_tag, win, NULL, &col, NULL, NULL))
 199                 return;
 200         printf("set_mode: %p, %d -> %d\n",
 201                         col, col->layout, layout);
 202         col->layout = layout;
 203         if (col->layout == SPLIT)
 204                 for (list_t *cur = col->rows; cur; cur = cur->next) {
 205                         row_t *row = cur->data;
 206                         row->height = wm_dpy->geom->h;
 207                 }
 208         wm_update();
 209 }
 210
 211 /* Focus the window in the current tag and record
 212  * it as the currently focused window */
 213 static void set_focus(win_t *win)
 214 {
 215         if (win == NULL || win == wm->root) {
 216                 sys_focus(wm->root);
 217                 return;
 218         }
 219
 220         dpy_t *dpy; col_t *col; row_t *row; flt_t *flt;
 221         switch (search(wm_tag, win, &dpy, &col, &row, &flt)) {
 222         case TILING:
 223                 wm_dpy = dpy;
 224                 wm_col = col;
 225                 wm_row = row;
 226                 dpy->layer = TILING;
 227                 break;
 228         case FLOATING:
 229                 wm_dpy = dpy;
 230                 wm_flt = flt;
 231                 dpy->layer = FLOATING;
 232                 break;
 233         }
 234         sys_focus(win);
 235 }
 236
 237 /* Save mouse start location when moving/resizing windows */
 238 static void set_move(win_t *win, ptr_t ptr, drag_t drag)
 239 {
 240         printf("set_move: %d - %p@%d,%d\n",
 241                         drag, win, ptr.rx, ptr.ry);
 242         move_mode = drag;
 243         if (drag == MOVE || drag == RESIZE) {
 244                 move_layer = searchl(wm_tag, win, NULL,
 245                                 &move_lcol, &move_lrow, &move_lflt);
 246                 if (move_layer < 0)
 247                         return;
 248                 move_prev = ptr;
 249                 int midy = win->y + (win->h/2);
 250                 int midx = win->x + (win->w/2);
 251                 move_dir.v = ptr.ry < midy ? -1 : +1;
 252                 move_dir.h = ptr.rx < midx ? -1 : +1;
 253         }
 254 }
 255
 256 /* Print a text representation of the window layout
 257  * Quite useful for debugging */
 258 static void print_txt(void)
 259 {
 260         for (list_t *ltag = wm->tags; ltag; ltag = ltag->next) {
 261                 tag_t *tag = ltag->data;
 262                 printf("tag:       <%-9p [%p->%p] >%-9p d=%-9p - %s\n",
 263                                 ltag->prev, ltag, ltag->data, ltag->next,
 264                                 tag->dpy, tag->name);
 265         for (list_t *ldpy = tag->dpys; ldpy; ldpy = ldpy->next) {
 266                 dpy_t *dpy  = ldpy->data;
 267                 win_t *geom = dpy->geom;
 268                 printf("  dpy:     <%-9p [%p->%p] >%-9p %c=%-9p - %d,%d %dx%d\n",
 269                                 ldpy->prev, ldpy, ldpy->data, ldpy->next,
 270                                 dpy->layer == TILING ? 'c' : 'f',
 271                                 dpy->layer == TILING ? (void*)dpy->col : (void*)dpy->flt,
 272                                 geom->x, geom->y, geom->h, geom->w);
 273         for (list_t *lcol = dpy->cols; lcol; lcol = lcol->next) {
 274                 col_t *col = lcol->data;
 275                 printf("    col:   <%-9p [%p->%p] >%-9p r=%-9p - %dpx @ %d\n",
 276                                 lcol->prev, lcol, lcol->data, lcol->next,
 277                                 col->row, col->width, col->layout);
 278         for (list_t *lrow = col->rows; lrow; lrow = lrow->next) {
 279                 row_t *row = lrow->data;
 280                 win_t *win = row->win;
 281                 printf("      row: <%-9p [%p>>%p] >%-9p focus=%d%d    - %4dpx \n",
 282                                 lrow->prev, lrow, win, lrow->next,
 283                                 col->row == row, wm_focus == win, win->h);
 284         } }
 285         for (list_t *lflt = dpy->flts; lflt; lflt = lflt->next) {
 286                 flt_t *flt = lflt->data;
 287                 win_t *win = flt->win;
 288                 printf("    flt:   <%-9p [%p>>%p] >%-9p focus=%d%d    - %d,%d %dx%d \n",
 289                                 lflt->prev, lflt, win, lflt->next,
 290                                 dpy->flt == flt, wm_focus == flt->win,
 291                                 flt->x, flt->y, flt->h, flt->w);
 292         }  } }
 293 }
 294
 295 /* Cleanly remove a window from a tag
 296  *   Determines the new focused row/col
 297  *   Prunes empty lists */
 298 static layer_t cut_win(win_t *win, tag_t *tag)
 299 {
 300         list_t *ldpy, *lcol, *lrow, *lflt;
 301         layer_t layer = searchl(tag, win, &ldpy, &lcol, &lrow, &lflt);
 302
 303         if (layer == TILING) {
 304                 dpy_t *dpy = DPY(ldpy);
 305                 col_t *col = COL(lcol);
 306                 col->row  = lrow->prev ? lrow->prev->data :
 307                             lrow->next ? lrow->next->data : NULL;
 308                 col->rows = list_remove(col->rows, lrow, 1);
 309                 if (col->rows == NULL && (lcol->next || lcol->prev)) {
 310                         dpy->col  = lcol->prev ? lcol->prev->data :
 311                                     lcol->next ? lcol->next->data : NULL;
 312                         dpy->cols = list_remove(dpy->cols, lcol, 1);
 313                 }
 314         }
 315
 316         if (layer == FLOATING) {
 317                 dpy_t *dpy = DPY(ldpy);
 318                 dpy->flts = list_remove(dpy->flts, lflt, 1);
 319                 dpy->flt  = dpy->flts ? list_last(dpy->flts)->data : NULL;
 320                 if (!dpy->flt && dpy->col && dpy->col->row)
 321                         dpy->layer = TILING;
 322         }
 323
 324         return layer;
 325 }
 326
 327 /* Insert a window into the tiling layer
 328  *   The window is added immediately after the
 329  *   columns currently focused row */
 330 static void put_win_col(win_t *win, tag_t *tag, dpy_t *dpy, col_t *col)
 331 {
 332         row_t *row = new0(row_t);
 333         row->win   = win;
 334         row->state = win->state ?: ST_SHOW;
 335
 336         if (col == NULL) {
 337                 col = new0(col_t);
 338                 dpy->cols = list_insert(dpy->cols, col);
 339         }
 340
 341         int nrows = list_length(col->rows);
 342         if (col->row) {
 343                 list_t *prev = list_find(col->rows, col->row);
 344                 list_insert_after(prev, row);
 345         } else {
 346                 col->rows = list_insert(col->rows, row);
 347         }
 348         tag->dpy           = dpy;
 349         tag->dpy->col      = col;
 350         tag->dpy->col->row = row;
 351         tag->dpy->layer    = TILING;
 352
 353         row->height = dpy->geom->h / MAX(nrows,1);
 354         if (nrows == 0) {
 355                 int ncols = list_length(dpy->cols);
 356                 col->width = dpy->geom->w / MAX(ncols-1,1);
 357         }
 358 }
 359
 360 /* Insert a window into the floating layer */
 361 static void put_win_flt(win_t *win, tag_t *tag, dpy_t *dpy)
 362 {
 363         flt_t *flt = new0(flt_t);
 364         flt->win   = win;
 365         flt->w     = dpy->geom->w / 2;
 366         flt->h     = dpy->geom->h / 2;
 367         flt->x     = dpy->geom->x + flt->w / 2;
 368         flt->y     = dpy->geom->y + flt->h / 2;
 369         flt->state = win->state ?: ST_SHOW;
 370         if (dpy->flt) {
 371                 flt->x = dpy->flt->x + 20;
 372                 flt->y = dpy->flt->y + 20;
 373         }
 374         dpy->flts = list_append(dpy->flts, flt);
 375         tag->dpy        = dpy;
 376         tag->dpy->flt   = flt;
 377         tag->dpy->layer = FLOATING;
 378 }
 379
 380 /* Insert a window into a tag */
 381 static void put_win(win_t *win, tag_t *tag, layer_t layer)
 382 {
 383         if (layer == TILING)
 384                 put_win_col(win, tag, tag->dpy, tag->dpy->col);
 385         if (layer == FLOATING)
 386                 put_win_flt(win, tag, tag->dpy);
 387 }
 388
 389 /* Move a window up, down, left, or right
 390  *   This handles moving with a column, between
 391  *   columns, and between multiple monitors. */
 392 static void shift_window(win_t *win, int col, int row)
 393 {
 394         if (!win) return;
 395         printf("shift_window: %p - %+d,%+d\n", win, col, row);
 396         print_txt();
 397         printf("shift_window: >>>\n");
 398         list_t *ldpy, *lcol, *lrow, *lflt;
 399         if (TILING != searchl(wm_tag, win, &ldpy, &lcol, &lrow, &lflt))
 400                 return;
 401         dpy_t *dpy = ldpy->data;
 402         if (row != 0) {
 403                 /* Move with a column, just swap rows */
 404                 list_t *src = lrow, *dst = NULL;
 405                 if (row < 0) dst = src->prev;
 406                 if (row > 0) dst = src->next;
 407                 if (src && dst) {
 408                         printf("swap: %p <-> %p\n", src->data, dst->data);
 409                         row_t *tmp = src->data;
 410                         src->data = dst->data;
 411                         dst->data = tmp;
 412                         goto update;
 413                 }
 414         } else {
 415                 /* Moving between columns */
 416                 int onlyrow = !lrow->prev && !lrow->next;
 417                 list_t *src = lcol, *dst = NULL;
 418                 if (col < 0) {
 419                         if (src->prev) {
 420                                 /* Normal move between columns */
 421                                 dst = src->prev;
 422                         } else if (!onlyrow) {
 423                                 /* Create new column */
 424                                 dpy->cols = list_insert(dpy->cols, new0(col_t));
 425                                 dst = src->prev;
 426                         } else if (ldpy->prev) {
 427                                 /* Move to next monitor */
 428                                 dpy = ldpy->prev->data;
 429                                 dst = list_last(dpy->cols);
 430                         } else {
 431                                 /* We, shall, not, be,
 432                                  * we shall not be moved */
 433                                 return;
 434                         }
 435                 }
 436                 if (col > 0) {
 437                         if (src->next) {
 438                                 dst = src->next;
 439                         } else if (!onlyrow) {
 440                                 dpy->cols = list_append(dpy->cols, new0(col_t));
 441                                 dst = src->next;
 442                         } else if (ldpy->next) {
 443                                 dpy = ldpy->next->data;
 444                                 dst = dpy->cols;
 445                         } else {
 446                                 return;
 447                         }
 448                 }
 449                 cut_win(win, wm_tag);
 450                 put_win_col(win, wm_tag, dpy, dst ? dst->data : NULL);
 451                 goto update;
 452         }
 453 update:
 454         print_txt();
 455         wm_update();
 456 }
 457
 458 /* Get next/prev item, with wraparound */
 459 static list_t *get_next(list_t *list, int forward)
 460 {
 461         list_t *next = forward ? list->next : list->prev;
 462         if (next == NULL) {
 463                 next = list;
 464                 while ((list = forward ? next->prev : next->next))
 465                         next = list;
 466         }
 467         return next;
 468 }
 469
 470 /* Move keyboard focus in a given direction */
 471 static void shift_focus(int cols, int rows)
 472 {
 473         printf("shift_focus: %+d,%+d\n", cols, rows);
 474         if (rows != 0 && wm_focus) {
 475                 /* Move focus up/down */
 476                 list_t *dpy, *col, *row;
 477                 if (TILING != searchl(wm_tag, wm_focus, &dpy, &col, &row, NULL))
 478                         return;
 479                 row_t *next = get_next(row, rows > 0)->data;
 480                 set_focus(next->win);
 481                 if (COL(col)->layout != SPLIT)
 482                         wm_update();
 483         }
 484         if (cols != 0) {
 485                 /* Move focus left/right */
 486                 list_t *dpy, *col, *row, *ndpy, *ncol = NULL;
 487                 if (wm_focus) {
 488                         /* Currently focused on a window */
 489                         if (TILING != searchl(wm_tag, wm_focus, &dpy, &col, &row, NULL))
 490                                 return;
 491                         ncol = cols > 0 ? col->next : col->prev;
 492                 } else {
 493                         /* Currently focused on an empty display */
 494                         dpy = list_find(wm_tag->dpys, wm_dpy);
 495                 }
 496                 if (ncol == NULL) {
 497                         /* Moving focus to a different display */
 498                         ndpy = get_next(dpy, cols > 0);
 499                         ncol = cols > 0 ? DPY(ndpy)->cols :
 500                                 list_last(DPY(ndpy)->cols);
 501                         wm_dpy = ndpy->data;
 502                 }
 503                 if (ncol && COL(ncol) && COL(ncol)->row)
 504                         set_focus(COL(ncol)->row->win);
 505                 else
 506                         sys_focus(wm->root);
 507         }
 508 }
 509
 510 /* Raise the window in the floating */
 511 static void raise_float(win_t *win)
 512 {
 513         printf("raise_float: %p\n", win);
 514         list_t *cur;
 515         for (cur = wm_dpy->flts; cur; cur = cur->next)
 516                 if (FLT(cur)->win == win)
 517                         break;
 518         if (cur) {
 519                 flt_t *flt = cur->data;
 520                 wm_dpy->flts = list_remove(wm_dpy->flts, cur, 0);
 521                 wm_dpy->flts = list_append(wm_dpy->flts, flt);
 522                 sys_raise(win);
 523         }
 524 }
 525
 526 /* Toggle between floating and tiling layers */
 527 static void switch_layer(void)
 528 {
 529         printf("switch_float: %p %d\n",
 530                         wm_dpy, wm_dpy->layer);
 531         wm_dpy->layer = !wm_dpy->layer;
 532         wm_update();
 533 }
 534
 535 /* Move current window between floating and tiling layers */
 536 static void set_layer(win_t *win)
 537 {
 538         if (!win) return;
 539         printf("set_float: %p %p\n", wm_dpy, win);
 540         wm_dpy->layer = !cut_win(win, wm_tag);
 541         put_win(win, wm_tag, wm_dpy->layer);
 542         wm_update();
 543 }
 544
 545 /* Allocate a new tag */
 546 static tag_t *tag_new(list_t *screens, const char *name)
 547 {
 548         tag_t *tag = new0(tag_t);
 549         strncpy(tag->name, name, sizeof(tag->name));
 550         for (list_t *cur = screens; cur; cur = cur->next) {
 551                 dpy_t *dpy  = new0(dpy_t);
 552                 dpy->geom = cur->data;
 553                 tag->dpys = list_append(tag->dpys, dpy);
 554         }
 555         tag->dpy  = tag->dpys->data;
 556         for (list_t *dpy = tag->dpys; dpy; dpy = dpy->next)
 557                 if (DPY(dpy)->geom->z > tag->dpy->geom->z)
 558                         tag->dpy = dpy->data;
 559         return tag;
 560 }
 561
 562 /* Search for a tag
 563  *   If it does not exist it is based on the
 564  *   display geometry in wm->screens */
 565 static tag_t *tag_find(const char *name)
 566 {
 567         tag_t *tag = NULL;
 568         for (list_t *cur = wm->tags; cur; cur = cur->next)
 569                 if (!strcmp(name, TAG(cur)->name)) {
 570                         tag = cur->data;
 571                         break;
 572                 }
 573         if (!tag) {
 574                 tag = tag_new(wm->screens, name);
 575                 wm->tags = list_append(wm->tags, tag);
 576         }
 577         return tag;
 578 }
 579
 580 /* Move the window from the current tag to the new tag
 581  *   Unlike wmii, only remove the current tag, not all tags */
 582 static void tag_set(win_t *win, const char *name)
 583 {
 584         printf("tag_set: %p %s\n", win, name);
 585         if (!strcmp(wm_tag->name, name))
 586                 return;
 587         tag_t *tag = tag_find(name);
 588         layer_t layer = cut_win(win, wm_tag);
 589         put_win(win, tag, layer);
 590         set_focus(wm_focus);
 591 }
 592
 593 /* Switch to a different tag */
 594 static void tag_switch(const char *name)
 595 {
 596         printf("tag_switch: %s\n", name);
 597         tag_t *old = wm_tag;
 598         if ((wm_col == NULL || wm_row == NULL) && wm_flt == NULL) {
 599                 while (old->dpys) {
 600                         dpy_t *dpy = old->dpys->data;
 601                         while (dpy->cols)
 602                                 dpy->cols = list_remove(dpy->cols, dpy->cols, 1);
 603                         old->dpys = list_remove(old->dpys, old->dpys, 1);
 604                 }
 605                 list_t *ltag = list_find(wm->tags, old);
 606                 wm->tags = list_remove(wm->tags, ltag, 1);
 607         }
 608         wm_tag = tag_find(name);
 609 }
 610
 611 /* Tile all windows in the given display
 612  *   This performs all the actual window tiling
 613  *   Currently supports  split, stack and maximized modes */
 614 static void wm_update_cols(dpy_t *dpy)
 615 {
 616         int  x=0,  y=0; // Current window top-left position
 617         int tx=0, ty=0; // Total size (sum of initial col widths and row heights w/o margin)
 618         int mx=0, my=0; // Maximum usable size (screen size minus margins)
 619         int       sy=0; // Stack size (height of focused stack window)
 620
 621         /* Scale horizontally */
 622         x  = dpy->geom->x;
 623         mx = dpy->geom->w - (list_length(dpy->cols)+1)*margin;
 624         for (list_t *lcol = dpy->cols; lcol; lcol = lcol->next)
 625                 tx += COL(lcol)->width;
 626         for (list_t *lcol = dpy->cols; lcol; lcol = lcol->next)
 627                 COL(lcol)->width *= (float)mx / tx;
 628
 629         /* Scale each column vertically */
 630         win_t *focus = get_focus();
 631         for (list_t *lcol = dpy->cols; lcol; lcol = lcol->next) {
 632                 col_t *col = lcol->data;
 633                 int nrows = list_length(col->rows);
 634                 ty = 0;
 635                 for (list_t *lrow = col->rows; lrow; lrow = lrow->next)
 636                         ty += ROW(lrow)->height;
 637                 y  = dpy->geom->y;
 638                 my = dpy->geom->h - (margin + (nrows-1)* margin    + margin);
 639                 sy = dpy->geom->h - (margin + (nrows-1)*(margin/2) + margin)
 640                                   -           (nrows-1)* stack;
 641                 for (list_t *lrow = col->rows; lrow; lrow = lrow->next) {
 642                         win_t *win = ROW(lrow)->win;
 643                         if (ROW(lrow)->state != ST_SHOW) {
 644                                 sys_show(win, ROW(lrow)->state);
 645                                 continue;
 646                         }
 647                         win->h = ROW(lrow)->height;
 648                         state_t state = ST_SHOW;
 649                         int height = 0;
 650                         switch (col->layout) {
 651                         case SPLIT:
 652                                 sys_move(win, x+margin, y+margin,
 653                                         col->width, win->h * ((float)my / ty));
 654                                 height = win->h;
 655                                 y += height + margin;
 656                                 break;
 657                         case STACK:
 658                                 if (lrow->next && ROW(lrow->next)->win == col->row->win) {
 659                                         /* Hack to prevent flashing */
 660                                         win_t *next = ROW(lrow->next)->win;
 661                                         sys_move(next, x+margin, y+margin+stack+margin/2,
 662                                                 col->width, sy);
 663                                         sys_show(next, ST_SHOW);
 664                                 }
 665                                 int isfocus = win == col->row->win;
 666                                 state  = isfocus ? ST_SHOW : ST_SHADE;
 667                                 sys_show(win, state);
 668                                 sys_move(win, x+margin, y+margin, col->width, sy);
 669                                 y += (isfocus ? sy : stack) + (margin/2);
 670                                 break;
 671                         case FULL:
 672                         case TAB:
 673                                 sys_move(win, x+margin, 0+margin,
 674                                         col->width, dpy->geom->h-2*margin);
 675                                 break;
 676                         }
 677                         sys_show(win, state);
 678                         if (focus == win)
 679                                 sys_raise(win);
 680                         ROW(lrow)->height = win->h;
 681                 }
 682                 x += col->width + margin;
 683         }
 684 }
 685
 686 /* Refresh the window layout */
 687 void wm_update(void)
 688 {
 689         /* Updates window sizes */
 690         for (list_t *ldpy = wm_tag->dpys; ldpy; ldpy = ldpy->next)
 691                 wm_update_cols(ldpy->data);
 692         tag_foreach_flt(wm_tag, ldpy, lflt, win) {
 693                 flt_t *flt = lflt->data;
 694                 sys_move(win, flt->x, flt->y, flt->w, flt->h);
 695                 sys_raise(flt->win);
 696                 sys_show(flt->win, flt->state);
 697         }
 698
 699         /* Hide other tags */
 700         for (list_t *tag = wm ->tags; tag; tag = tag->next)
 701                 if (tag->data != wm_tag) {
 702                         tag_foreach_col(TAG(tag), dpy, col, row, win)
 703                                 sys_show(win, ST_HIDE);
 704                         tag_foreach_flt(TAG(tag), dpy, flt, win)
 705                                 sys_show(win, ST_HIDE);
 706                 }
 707
 708         /* Set focused window */
 709         if (wm_focus)
 710                 set_focus(wm_focus);
 711 }
 712
 713 /*******************************
 714  * Window management functions *
 715  *******************************/
 716 int wm_handle_event(win_t *win, event_t ev, mod_t mod, ptr_t ptr)
 717 {
 718         if (!win || win == wm_dpy->geom)
 719                 return 0;
 720         //printf("wm_handle_event: %p - %x %c%c%c%c%c\n", win, ev,
 721         //      mod.up    ? '^' : 'v',
 722         //      mod.alt   ? 'a' : '-',
 723         //      mod.ctrl  ? 'c' : '-',
 724         //      mod.shift ? 's' : '-',
 725         //      mod.win   ? 'w' : '-');
 726
 727         /* Mouse events */
 728         if (EV_MOUSE0 <= ev && ev <= EV_MOUSE7) {
 729                 if (ev == EV_MOUSE1 && !mod.MODKEY && !mod.up)
 730                         return raise_float(win),         0;
 731                 if ((ev == EV_MOUSE3 && mod.MODKEY && !mod.up) ||
 732                     (ev == EV_MOUSE1 && mod.MODKEY && !mod.up && mod.shift))
 733                         return set_move(win,ptr,RESIZE), 1;
 734                 if (ev == EV_MOUSE1 && mod.MODKEY && !mod.up)
 735                         return set_move(win,ptr,MOVE),   1;
 736                 if (move_mode != NONE && mod.up)
 737                         return set_move(win,ptr,NONE),   1;
 738                 if (ev == EV_MOUSE1 && !mod.up && win->state == ST_SHADE)
 739                         return set_focus(win), wm_update(), 0;
 740                 return 0;
 741         }
 742
 743         /* Only handle key-down */
 744         if (mod.up)
 745                 return mod.MODKEY || ev == EV_ALT;
 746
 747         /* Misc */
 748         if (mod.MODKEY) {
 749 #ifdef DEBUG
 750                 if (ev == EV_F1) return raise_float(win), 1;
 751                 if (ev == EV_F2) return set_focus(win), 1;
 752                 if (ev == EV_F3) return sys_show(win, ST_SHOW),  1;
 753                 if (ev == EV_F4) return sys_show(win, ST_HIDE),  1;
 754                 if (ev == EV_F7) return sys_show(win, ST_SHADE), 1;
 755 #endif
 756                 if (ev == EV_F5) return wm_update(),    1;
 757                 if (ev == EV_F6) return print_txt(),    1;
 758                 if (ev == 'q')   return sys_exit(),     1;
 759                 if (ev == 'f')   return wm_handle_state(win, win->state,
 760                         win->state == ST_FULL ? ST_SHOW : ST_FULL);
 761                 if (ev == 'g')   return wm_handle_state(win, win->state,
 762                         win->state == ST_MAX  ? ST_SHOW : ST_MAX);
 763         }
 764         if (mod.MODKEY && mod.shift) {
 765                 if (ev == 'c')   return sys_show(win, ST_CLOSE), 1;
 766         }
 767
 768         /* Floating layer */
 769         if (ev == ' ') {
 770                 if (mod.MODKEY && mod.shift)
 771                         return set_layer(win), 1;
 772                 if (mod.MODKEY)
 773                         return switch_layer(), 1;
 774         }
 775
 776         /* Movement commands */
 777         if (mod.MODKEY && mod.shift) {
 778                 switch (ev) {
 779                 case 'h': return shift_window(wm_focus,-1, 0), 1;
 780                 case 'j': return shift_window(wm_focus, 0,+1), 1;
 781                 case 'k': return shift_window(wm_focus, 0,-1), 1;
 782                 case 'l': return shift_window(wm_focus,+1, 0), 1;
 783                 default: break;
 784                 }
 785         }
 786         else if (mod.MODKEY) {
 787                 switch (ev) {
 788                 case 'h': return shift_focus(-1, 0), 1;
 789                 case 'j': return shift_focus( 0,+1), 1;
 790                 case 'k': return shift_focus( 0,-1), 1;
 791                 case 'l': return shift_focus(+1, 0), 1;
 792                 default: break;
 793                 }
 794         }
 795
 796         /* Column layout commands */
 797         if (mod.MODKEY) {
 798                 switch (ev) {
 799                 case 'd': return set_mode(win, SPLIT), 1;
 800                 case 's': return set_mode(win, STACK), 1;
 801                 case 'm': return set_mode(win, FULL),  1;
 802                 case 't': return set_mode(win, TAB),   1;
 803                 default: break;
 804                 }
 805         }
 806
 807         /* Tag switching */
 808         if (mod.MODKEY && '0' <= ev && ev <= '9') {
 809                 char name[] = {ev, '\0'};
 810                 if (mod.shift)
 811                         tag_set(win, name);
 812                 else
 813                         tag_switch(name);
 814                 wm_update();
 815         }
 816
 817         /* Focus change */
 818         if (ev == EV_ENTER && win->state != ST_SHADE)
 819                 return set_focus(win), 1;
 820
 821         /* Reset focus after after focus change,
 822          * not sure what is causing the focus change in the first place
 823          * but preventing that would be a better solution */
 824         if (ev == EV_FOCUS)
 825                 sys_focus(wm_focus ?: wm->root);
 826
 827         return mod.MODKEY;
 828 }
 829
 830 int wm_handle_ptr(win_t *cwin, ptr_t ptr)
 831 {
 832         //printf("wm_handle_ptr: %p - %d,%d %d,%d (%d) -- \n",
 833         //              cwin, ptr.x, ptr.y, ptr.rx, ptr.ry, move_mode);
 834
 835         if (move_mode == NONE)
 836                 return 0;
 837
 838         int dx = ptr.rx - move_prev.rx;
 839         int dy = ptr.ry - move_prev.ry;
 840         move_prev = ptr;
 841
 842         if (move_layer == TILING && move_mode == RESIZE) {
 843                 list_t *vert = move_dir.v < 0 ? move_lrow->prev : move_lrow->next;
 844                 list_t *horz = move_dir.h < 0 ? move_lcol->prev : move_lcol->next;
 845                 if (vert) {
 846                         ROW(move_lrow)->height += move_dir.v * dy;
 847                         ROW(vert)->height      -= move_dir.v * dy;
 848                 }
 849                 if (horz) {
 850                         COL(move_lcol)->width  += move_dir.h * dx;
 851                         COL(horz)->width       -= move_dir.h * dx;
 852                 }
 853                 wm_update();
 854         }
 855
 856         if (move_layer == FLOATING) {
 857                 flt_t *flt = move_lflt->data;
 858                 win_t *win = flt->win;
 859                 if (move_mode == MOVE)
 860                         sys_move(win, win->x+dx, win->y+dy, win->w, win->h);
 861                 else if (move_mode == RESIZE)
 862                         sys_move(win,
 863                                 win->x + dx * (move_dir.h < 0),
 864                                 win->y + dy * (move_dir.v < 0),
 865                                 win->w + dx *  move_dir.h,
 866                                 win->h + dy *  move_dir.v);
 867                 flt->x = win->x; flt->y = win->y;
 868                 flt->w = win->w; flt->h = win->h;
 869         }
 870
 871         return 0;
 872 }
 873
 874 int wm_handle_state(win_t *win, state_t prev, state_t next)
 875 {
 876         row_t *row = NULL;
 877         flt_t *flt = NULL;
 878
 879         printf("wm_handle_state - %p %x -> %x\n", win, prev, next);
 880
 881         search(wm_tag, win, NULL, NULL, &row, &flt);
 882
 883         if (!row && !flt && next == ST_SHOW)
 884                 return wm_insert(win), 1;
 885         if ((row || flt) && (next == ST_HIDE || next == ST_ICON))
 886                 return wm_remove(win), 1;
 887
 888         if (row) row->state = next;
 889         if (flt) flt->state = next;
 890
 891         if (prev == ST_MAX || prev == ST_FULL ||
 892             next == ST_MAX || next == ST_FULL)
 893                 wm_update();
 894
 895         return 1;
 896 }
 897
 898 void wm_insert(win_t *win)
 899 {
 900         printf("wm_insert: %p\n", win);
 901         print_txt();
 902
 903         /* Check for toolbars */
 904         if (win->type == TYPE_TOOLBAR)
 905                 return wm_update();
 906
 907         /* Initialize window */
 908         sys_watch(win, EV_ENTER, MOD());
 909         sys_watch(win, EV_FOCUS, MOD());
 910
 911         /* Add to screen */
 912         if (win->type == TYPE_DIALOG || win->parent)
 913                 wm_dpy->layer = FLOATING;
 914         put_win(win, wm_tag, wm_dpy->layer);
 915
 916         /* Arrange */
 917         wm_update();
 918         set_focus(win);
 919         print_txt();
 920 }
 921
 922 void wm_remove(win_t *win)
 923 {
 924         printf("wm_remove: %p\n", win);
 925         print_txt();
 926         if (win->type == TYPE_TOOLBAR)
 927                 return wm_update();
 928         for (list_t *tag = wm->tags; tag; tag = tag->next)
 929                 cut_win(win, tag->data);
 930         set_focus(wm_focus);
 931         wm_update();
 932         print_txt();
 933 }
 934
 935 void wm_init(win_t *root)
 936 {
 937         printf("wm_init: %p\n", root);
 938
 939         /* Load configuration */
 940         margin = conf_get_int("main.margin", margin);
 941         stack  = conf_get_int("main.stack",  stack);
 942
 943         wm          = new0(wm_t);
 944         wm->root    = root;
 945         wm->screens = list_sort(sys_info(root), 0, sort_win);
 946         wm->tag     = tag_new(wm->screens, "1");
 947         wm->tags    = list_insert(NULL, wm->tag);
 948
 949         event_t ev_e[] = {EV_ENTER, EV_FOCUS};
 950         event_t ev_s[] = {'h', 'j', 'k', 'l', 'c', 'q', ' ',
 951                 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
 952                 EV_MOUSE1, EV_MOUSE3};
 953         event_t ev_m[] = {'h', 'j', 'k', 'l', 'd', 's', 'm', 't', 'f', 'g', ' ',
 954                 '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
 955                 EV_F1, EV_F2, EV_F3, EV_F4,  EV_F5,  EV_F6,
 956                 EV_F7, EV_F8, EV_F9, EV_F10, EV_F11, EV_F12,
 957                 EV_MOUSE1, EV_MOUSE3};
 958         for (int i = 0; i < countof(ev_e); i++)
 959                 sys_watch(root, ev_e[i],  MOD());
 960         for (int i = 0; i < countof(ev_m); i++)
 961                 sys_watch(root, ev_m[i], MOD(.MODKEY=1));
 962         for (int i = 0; i < countof(ev_s); i++)
 963                 sys_watch(root, ev_s[i], MOD(.MODKEY=1,.shift=1));
 964 }
 965
 966 void wm_free(win_t *root)
 967 {
 968         /* Re-show and free all windows */
 969         while ( wm->tags) { tag_t *tag =  wm->tags->data;
 970         while (tag->dpys) { dpy_t *dpy = tag->dpys->data;
 971         while (dpy->cols) { col_t *col = dpy->cols->data;
 972         while (col->rows) { row_t *row = col->rows->data;
 973                 sys_show(row->win, ST_SHOW);
 974         col->rows = list_remove(col->rows, col->rows, 1); }
 975         dpy->cols = list_remove(dpy->cols, dpy->cols, 1); }
 976         while (dpy->flts) { flt_t *flt = dpy->flts->data;
 977                 sys_show(flt->win, ST_SHOW);
 978         dpy->flts = list_remove(dpy->flts, dpy->flts, 1); }
 979         tag->dpys = list_remove(tag->dpys, tag->dpys, 1); }
 980          wm->tags = list_remove( wm->tags,  wm->tags, 1); }
 981
 982         /* Free remaining data */
 983         free(wm);
 984 }