mod_tiling/split.c

   1 /*
   2  * ion/mod_tiling/split.c
   3  *
   4  * Copyright (c) Tuomo Valkonen 1999-2009.
   5  *
   6  * See the included file LICENSE for details.
   7  */
   8
   9 #include <limits.h>
  10 #include <string.h>
  11 #include <X11/Xmd.h>
  12
  13 #include <libtu/minmax.h>
  14 #include <libtu/rb.h>
  15 #include <libtu/objp.h>
  16 #include <ioncore/common.h>
  17 #include <ioncore/focus.h>
  18 #include <ioncore/global.h>
  19 #include <ioncore/window.h>
  20 #include <ioncore/resize.h>
  21 #include <ioncore/attach.h>
  22 #include <ioncore/manage.h>
  23 #include <ioncore/extlconv.h>
  24 #include <ioncore/rectangle.h>
  25 #include <ioncore/saveload.h>
  26 #include <ioncore/names.h>
  27 #include "tiling.h"
  28 #include "split.h"
  29 #include "split-stdisp.h"
  30
  31
  32 static Rb_node split_of_map=NULL;
  33
  34
  35 /*{{{ Geometry helper functions */
  36
  37
  38 int split_size(WSplit *split, int dir)
  39 {
  40     return (dir==SPLIT_HORIZONTAL ? split->geom.w : split->geom.h);
  41 }
  42
  43 int split_other_size(WSplit *split, int dir)
  44 {
  45     return (dir==SPLIT_VERTICAL ? split->geom.w : split->geom.h);
  46 }
  47
  48 int split_pos(WSplit *split, int dir)
  49 {
  50     return (dir==SPLIT_HORIZONTAL ? split->geom.x : split->geom.y);
  51 }
  52
  53 int split_other_pos(WSplit *split, int dir)
  54 {
  55     return (dir==SPLIT_VERTICAL ? split->geom.x : split->geom.y);
  56 }
  57
  58
  59 static int reg_calcresize(WRegion *reg, int dir, int nsize)
  60 {
  61     int tmp;
  62
  63     if(dir==SPLIT_HORIZONTAL)
  64         tmp=region_min_w(reg);
  65     else
  66         tmp=region_min_h(reg);
  67
  68     return (nsize<tmp ? tmp : nsize);
  69 }
  70
  71
  72 /* No, these are not even supposed to be proper/consistent
  73  * Z \cup {\infty, -\infty} calculation rules.
  74  */
  75
  76 static int infadd(int x, int y)
  77 {
  78     if(x==INT_MAX || y==INT_MAX)
  79         return INT_MAX;
  80     else
  81         return x+y;
  82 }
  83
  84
  85 static int infsub(int x, int y)
  86 {
  87     if(x==INT_MAX)
  88         return INT_MAX;
  89     else if(y==INT_MAX)
  90         return 0;
  91     else
  92         return x-y;
  93 }
  94
  95
  96 /* Negative "unused space" means no SPLIT_UNUSED under a node, while
  97  * zero unused space means there's a zero-sized SPLIT_UNUSED under the
  98  * node.
  99  */
 100 static int unusedadd(int x, int y)
 101 {
 102     if(x<0 && y<0)
 103         return -1;
 104     return maxof(x, 0)+maxof(y, 0);
 105 }
 106
 107
 108 static void bound(int *what, int min, int max)
 109 {
 110     if(*what<min)
 111         *what=min;
 112     else if(*what>max)
 113         *what=max;
 114 }
 115
 116
 117 /*}}}*/
 118
 119
 120 /*{{{ Functions to get and set a region's containing node */
 121
 122
 123 #define node_of_reg splittree_node_of
 124
 125 WSplitRegion *splittree_node_of(WRegion *reg)
 126 {
 127     Rb_node node=NULL;
 128     int found=0;
 129
 130     /*assert(REGION_MANAGER_CHK(reg, WTiling)!=NULL);*/
 131
 132     if(split_of_map!=NULL){
 133         node=rb_find_pkey_n(split_of_map, reg, &found);
 134         if(found)
 135             return (WSplitRegion*)(node->v.val);
 136     }
 137
 138     return NULL;
 139 }
 140
 141
 142 #define set_node_of_reg splittree_set_node_of
 143
 144
 145 bool splittree_set_node_of(WRegion *reg, WSplitRegion *split)
 146 {
 147     Rb_node node=NULL;
 148     int found;
 149
 150     /*assert(REGION_MANAGER_CHK(reg, WTiling)!=NULL);*/
 151
 152     if(split_of_map==NULL){
 153         if(split==NULL)
 154             return TRUE;
 155         split_of_map=make_rb();
 156         if(split_of_map==NULL)
 157             return FALSE;
 158     }
 159
 160     node=rb_find_pkey_n(split_of_map, reg, &found);
 161     if(found)
 162         rb_delete_node(node);
 163
 164     return (rb_insertp(split_of_map, reg, split)!=NULL);
 165 }
 166
 167
 168 /*}}}*/
 169
 170
 171 /*{{{ Primn */
 172
 173
 174 WPrimn primn_invert(WPrimn primn)
 175 {
 176     return (primn==PRIMN_TL
 177             ? PRIMN_BR
 178             : (primn==PRIMN_BR
 179                ? PRIMN_TL
 180                : primn));
 181 }
 182
 183
 184 WPrimn primn_none2any(WPrimn primn)
 185 {
 186     return (primn==PRIMN_NONE ? PRIMN_ANY : primn);
 187 }
 188
 189
 190 /*}}}*/
 191
 192
 193 /*{{{ Create */
 194
 195
 196 bool split_init(WSplit *split, const WRectangle *geom)
 197 {
 198     split->parent=NULL;
 199     split->ws_if_root=NULL;
 200     split->geom=*geom;
 201     split->min_w=0;
 202     split->min_h=0;
 203     split->max_w=INT_MAX;
 204     split->max_h=INT_MAX;
 205     split->unused_w=-1;
 206     split->unused_h=-1;
 207     return TRUE;
 208 }
 209
 210 bool splitinner_init(WSplitInner *split, const WRectangle *geom)
 211 {
 212     return split_init(&(split->split), geom);
 213 }
 214
 215
 216 bool splitsplit_init(WSplitSplit *split, const WRectangle *geom, int dir)
 217 {
 218     splitinner_init(&(split->isplit), geom);
 219     split->dir=dir;
 220     split->tl=NULL;
 221     split->br=NULL;
 222     split->current=SPLIT_CURRENT_TL;
 223     return TRUE;
 224 }
 225
 226
 227 bool splitregion_init(WSplitRegion *split, const WRectangle *geom,
 228                       WRegion *reg)
 229 {
 230     split_init(&(split->split), geom);
 231     split->reg=reg;
 232     if(reg!=NULL)
 233         set_node_of_reg(reg, split);
 234     return TRUE;
 235 }
 236
 237
 238 bool splitst_init(WSplitST *split, const WRectangle *geom, WRegion *reg)
 239 {
 240     splitregion_init(&(split->regnode), geom, reg);
 241     split->orientation=REGION_ORIENTATION_HORIZONTAL;
 242     split->corner=MPLEX_STDISP_BL;
 243     return TRUE;
 244 }
 245
 246
 247 WSplitSplit *create_splitsplit(const WRectangle *geom, int dir)
 248 {
 249     CREATEOBJ_IMPL(WSplitSplit, splitsplit, (p, geom, dir));
 250 }
 251
 252
 253 WSplitRegion *create_splitregion(const WRectangle *geom, WRegion *reg)
 254 {
 255     CREATEOBJ_IMPL(WSplitRegion, splitregion, (p, geom, reg));
 256 }
 257
 258
 259 WSplitST *create_splitst(const WRectangle *geom, WRegion *reg)
 260 {
 261     CREATEOBJ_IMPL(WSplitST, splitst, (p, geom, reg));
 262 }
 263
 264
 265 /*}}}*/
 266
 267
 268 /*{{{ Deinit */
 269
 270
 271 void split_deinit(WSplit *split)
 272 {
 273     assert(split->parent==NULL);
 274 }
 275
 276
 277 void splitinner_deinit(WSplitInner *split)
 278 {
 279     split_deinit(&(split->split));
 280 }
 281
 282
 283 void splitsplit_deinit(WSplitSplit *split)
 284 {
 285     if(split->tl!=NULL){
 286         split->tl->parent=NULL;
 287         destroy_obj((Obj*)(split->tl));
 288     }
 289     if(split->br!=NULL){
 290         split->br->parent=NULL;
 291         destroy_obj((Obj*)(split->br));
 292     }
 293
 294     splitinner_deinit(&(split->isplit));
 295 }
 296
 297
 298 void splitregion_deinit(WSplitRegion *split)
 299 {
 300     if(split->reg!=NULL){
 301         set_node_of_reg(split->reg, NULL);
 302         split->reg=NULL;
 303     }
 304
 305     split_deinit(&(split->split));
 306 }
 307
 308
 309 void splitst_deinit(WSplitST *split)
 310 {
 311     splitregion_deinit(&(split->regnode));
 312 }
 313
 314
 315 /*}}}*/
 316
 317
 318 /*{{{ Size bounds management */
 319
 320
 321 static void splitregion_update_bounds(WSplitRegion *node, bool recursive)
 322 {
 323     WSizeHints hints;
 324     WSplit *snode=(WSplit*)node;
 325
 326     assert(node->reg!=NULL);
 327
 328     region_size_hints(node->reg, &hints);
 329
 330     snode->min_w=maxof(1, hints.min_set ? hints.min_width : 1);
 331     snode->max_w=INT_MAX;
 332     snode->unused_w=-1;
 333
 334     snode->min_h=maxof(1, hints.min_set ? hints.min_height : 1);
 335     snode->max_h=INT_MAX;
 336     snode->unused_h=-1;
 337 }
 338
 339
 340 static void splitst_update_bounds(WSplitST *node, bool rec)
 341 {
 342     WSplit *snode=(WSplit*)node;
 343
 344     if(node->regnode.reg==NULL){
 345         snode->min_w=CF_STDISP_MIN_SZ;
 346         snode->min_h=CF_STDISP_MIN_SZ;
 347         snode->max_w=CF_STDISP_MIN_SZ;
 348         snode->max_h=CF_STDISP_MIN_SZ;
 349     }else{
 350         WSizeHints hints;
 351         region_size_hints(node->regnode.reg, &hints);
 352         snode->min_w=maxof(1, hints.min_set ? hints.min_width : 1);
 353         snode->max_w=maxof(snode->min_w, hints.min_width);
 354         snode->min_h=maxof(1, hints.min_set ? hints.min_height : 1);
 355         snode->max_h=maxof(snode->min_h, hints.min_height);
 356     }
 357
 358     snode->unused_w=-1;
 359     snode->unused_h=-1;
 360
 361     if(node->orientation==REGION_ORIENTATION_HORIZONTAL){
 362         snode->min_w=CF_STDISP_MIN_SZ;
 363         snode->max_w=INT_MAX;
 364     }else{
 365         snode->min_h=CF_STDISP_MIN_SZ;
 366         snode->max_h=INT_MAX;
 367     }
 368 }
 369
 370
 371 static void splitsplit_update_bounds(WSplitSplit *split, bool recursive)
 372 {
 373     WSplit *tl, *br;
 374     WSplit *node=(WSplit*)split;
 375
 376     assert(split->tl!=NULL && split->br!=NULL);
 377
 378     tl=split->tl;
 379     br=split->br;
 380
 381     if(recursive){
 382         split_update_bounds(tl, TRUE);
 383         split_update_bounds(br, TRUE);
 384     }
 385
 386     if(split->dir==SPLIT_HORIZONTAL){
 387         node->max_w=infadd(tl->max_w, br->max_w);
 388         node->min_w=infadd(tl->min_w, br->min_w);
 389         node->unused_w=unusedadd(tl->unused_w, br->unused_w);
 390         node->min_h=maxof(tl->min_h, br->min_h);
 391         node->max_h=maxof(minof(tl->max_h, br->max_h), node->min_h);
 392         node->unused_h=minof(tl->unused_h, br->unused_h);
 393     }else{
 394         node->max_h=infadd(tl->max_h, br->max_h);
 395         node->min_h=infadd(tl->min_h, br->min_h);
 396         node->unused_h=unusedadd(tl->unused_h, br->unused_h);
 397         node->min_w=maxof(tl->min_w, br->min_w);
 398         node->max_w=maxof(minof(tl->max_w, br->max_w), node->min_w);
 399         node->unused_w=minof(tl->unused_w, br->unused_w);
 400     }
 401 }
 402
 403
 404 void split_update_bounds(WSplit *node, bool recursive)
 405 {
 406     CALL_DYN(split_update_bounds, node, (node, recursive));
 407 }
 408
 409
 410 void splitsplit_update_geom_from_children(WSplitSplit *node)
 411 {
 412     if(node->dir==SPLIT_VERTICAL){
 413         ((WSplit*)node)->geom.h=node->tl->geom.h+node->br->geom.h;
 414         ((WSplit*)node)->geom.y=node->tl->geom.y;
 415     }else if(node->dir==SPLIT_HORIZONTAL){
 416         ((WSplit*)node)->geom.w=node->tl->geom.w+node->br->geom.w;
 417         ((WSplit*)node)->geom.x=node->tl->geom.x;
 418     }
 419 }
 420
 421
 422 /*}}}*/
 423
 424
 425 /*{{{ Status display handling helper functions. */
 426
 427
 428 static WSplitST *saw_stdisp=NULL;
 429
 430
 431 void splittree_begin_resize()
 432 {
 433     saw_stdisp=NULL;
 434 }
 435
 436
 437 void splittree_end_resize()
 438 {
 439     if(saw_stdisp!=NULL){
 440         split_regularise_stdisp(saw_stdisp);
 441         saw_stdisp=NULL;
 442     }
 443 }
 444
 445
 446 static void splittree_scan_stdisp_rootward_(WSplitInner *node_)
 447 {
 448     WSplitSplit *node=OBJ_CAST(node_, WSplitSplit);
 449
 450     if(node!=NULL){
 451         if(OBJ_IS(node->tl, WSplitST)){
 452             saw_stdisp=(WSplitST*)(node->tl);
 453             return;
 454         }else if(OBJ_IS(node->br, WSplitST)){
 455             saw_stdisp=(WSplitST*)(node->br);
 456             return;
 457         }
 458     }
 459
 460     if(node_->split.parent!=NULL)
 461         splittree_scan_stdisp_rootward_(node_->split.parent);
 462 }
 463
 464
 465 void splittree_scan_stdisp_rootward(WSplit *node)
 466 {
 467     if(node->parent!=NULL)
 468         splittree_scan_stdisp_rootward_(node->parent);
 469 }
 470
 471
 472 static WSplitST *splittree_scan_stdisp(WSplit *node_, bool set_saw)
 473 {
 474     WSplitST *r=NULL;
 475     WSplitSplit *node=OBJ_CAST(node_, WSplitSplit);
 476
 477     if(node==NULL)
 478         return NULL;
 479
 480     r=OBJ_CAST(node->tl, WSplitST);
 481     if(r==NULL)
 482         r=OBJ_CAST(node->br, WSplitST);
 483
 484     if(r!=NULL){
 485         if(set_saw)
 486             saw_stdisp=r;
 487         return r;
 488     }
 489
 490     r=splittree_scan_stdisp(node->tl, set_saw);
 491     if(r==NULL)
 492         r=splittree_scan_stdisp(node->br, set_saw);
 493
 494     return r;
 495 }
 496
 497
 498 static bool stdisp_immediate_child(WSplitSplit *node)
 499 {
 500     return (node!=NULL && (OBJ_IS(node->tl, WSplitST) ||
 501                            OBJ_IS(node->br, WSplitST)));
 502 }
 503
 504
 505 static WSplit *dodge_stdisp(WSplit *node, bool keep_within)
 506 {
 507     WSplitST *stdisp;
 508     WSplitSplit *stdispp;
 509
 510     stdisp=splittree_scan_stdisp(node, TRUE);
 511
 512     if(stdisp==NULL)
 513         return node;
 514
 515     stdispp=OBJ_CAST(((WSplit*)stdisp)->parent, WSplitSplit);
 516
 517     if(stdispp==NULL)
 518         return node;
 519
 520     if((WSplit*)stdispp==node){
 521         /* Node itself immediately contains stdisp. Due to the way
 522          * try_unsink works, stdisp this will not change, so another
 523          * node must be used, if we want to fully dodge stdisp.
 524          */
 525         return (keep_within
 526                 ? node
 527                 : (stdispp->tl==(WSplit*)stdisp
 528                    ? stdispp->br
 529                    : stdispp->tl));
 530     }
 531
 532     do{
 533         if(!split_try_unsink_stdisp(stdispp, FALSE, TRUE)){
 534             warn(TR("Unable to move the status display out of way."));
 535             return NULL;
 536         }
 537     }while(stdispp->tl!=node && stdispp->br!=node);
 538
 539     return node;
 540 }
 541
 542
 543 /*}}}*/
 544
 545
 546 /*{{{ Low-level resize code; from root to leaf */
 547
 548
 549 static void split_do_resize_default(WSplit *node, const WRectangle *ng,
 550                                     WPrimn hprimn, WPrimn vprimn,
 551                                     bool transpose)
 552 {
 553     node->geom=*ng;
 554 }
 555
 556
 557 static void splitregion_do_resize(WSplitRegion *node, const WRectangle *ng,
 558                                   WPrimn hprimn, WPrimn vprimn,
 559                                   bool transpose)
 560 {
 561     assert(node->reg!=NULL);
 562     region_fit(node->reg, ng, REGION_FIT_EXACT);
 563     split_update_bounds(&(node->split), FALSE);
 564     node->split.geom=*ng;
 565 }
 566
 567
 568 static void splitst_do_resize(WSplitST *node, const WRectangle *ng,
 569                               WPrimn hprimn, WPrimn vprimn,
 570                               bool transpose)
 571 {
 572     saw_stdisp=node;
 573
 574     if(node->regnode.reg==NULL){
 575         ((WSplit*)node)->geom=*ng;
 576     }else{
 577         splitregion_do_resize(&(node->regnode), ng, hprimn, vprimn,
 578                                transpose);
 579     }
 580 }
 581
 582
 583 static int other_dir(int dir)
 584 {
 585     return (dir==SPLIT_VERTICAL ? SPLIT_HORIZONTAL : SPLIT_VERTICAL);
 586 }
 587
 588
 589 static void adjust_sizes(int *tls_, int *brs_, int nsize, int sz,
 590                          int tlmin, int brmin, int tlmax, int brmax,
 591                          int primn)
 592 {
 593     int tls=*tls_;
 594     int brs=*brs_;
 595
 596     if(primn==PRIMN_TL){
 597         tls=tls+nsize-sz;
 598         bound(&tls, tlmin, tlmax);
 599         brs=nsize-tls;
 600         bound(&brs, brmin, brmax);
 601         tls=nsize-brs;
 602         bound(&tls, tlmin, tlmax);
 603     }else if(primn==PRIMN_BR){
 604         brs=brs+nsize-sz;
 605         bound(&brs, brmin, brmax);
 606         tls=nsize-brs;
 607         bound(&tls, tlmin, tlmax);
 608         brs=nsize-tls;
 609         bound(&brs, brmin, brmax);
 610     }else{ /* && PRIMN_ANY */
 611         tls=tls*nsize/sz;
 612         bound(&tls, tlmin, tlmax);
 613         brs=nsize-tls;
 614         bound(&brs, brmin, brmax);
 615         tls=nsize-brs;
 616         bound(&tls, tlmin, tlmax);
 617     }
 618
 619     *tls_=tls;
 620     *brs_=brs;
 621 }
 622
 623
 624 static void get_minmaxunused(WSplit *node, int dir,
 625                              int *min, int *max, int *unused)
 626 {
 627     if(dir==SPLIT_VERTICAL){
 628         *min=node->min_h;
 629         *max=maxof(*min, node->max_h);
 630         *unused=minof(node->unused_h, node->geom.h);
 631     }else{
 632         *min=node->min_w;
 633         *max=maxof(*min, node->max_w);
 634         *unused=minof(node->unused_w, node->geom.w);
 635     }
 636 }
 637
 638
 639 void splitsplit_do_resize(WSplitSplit *node, const WRectangle *ng,
 640                           WPrimn hprimn, WPrimn vprimn, bool transpose)
 641 {
 642     assert(ng->w>=0 && ng->h>=0);
 643     assert(node->tl!=NULL && node->br!=NULL);
 644     assert(!transpose || (hprimn==PRIMN_ANY && vprimn==PRIMN_ANY));
 645
 646     {
 647         WSplit *tl=node->tl, *br=node->br;
 648         int tls=split_size((WSplit*)tl, node->dir);
 649         int brs=split_size((WSplit*)br, node->dir);
 650         int sz=tls+brs;
 651         /* Status display can not be transposed. */
 652         int dir=((transpose && !stdisp_immediate_child(node))
 653                  ? other_dir(node->dir)
 654                  : node->dir);
 655         int nsize=(dir==SPLIT_VERTICAL ? ng->h : ng->w);
 656         int primn=(dir==SPLIT_VERTICAL ? vprimn : hprimn);
 657         int tlmin, tlmax, tlunused, tlused;
 658         int brmin, brmax, brunused, brused;
 659         WRectangle tlg=*ng, brg=*ng;
 660
 661         get_minmaxunused(tl, dir, &tlmin, &tlmax, &tlunused);
 662         get_minmaxunused(br, dir, &brmin, &brmax, &brunused);
 663
 664         tlused=maxof(0, tls-maxof(0, tlunused));
 665         brused=maxof(0, brs-maxof(0, brunused));
 666         /* tlmin,  brmin >= 1 => (tls>=tlmin, brs>=brmin => sz>0) */
 667
 668         if(sz>2){
 669             if(primn==PRIMN_ANY && (tlunused>=0 || brunused>=0)){
 670                 if(nsize<=tlused+brused){
 671                     /* Need to shrink a tangible node */
 672                     adjust_sizes(&tls, &brs, nsize, sz,
 673                                  tlmin, brmin, tlused, brused, primn);
 674                 }else{
 675                     /* Just expand or shrink unused space */
 676                     adjust_sizes(&tls, &brs, nsize, sz,
 677                                  tlused, brused,
 678                                  (tlunused<0 ? tlused : tlmax),
 679                                  (brunused<0 ? brused : brmax), primn);
 680                 }
 681
 682             }else{
 683                 adjust_sizes(&tls, &brs, nsize, sz,
 684                              tlmin, brmin, tlmax, brmax, primn);
 685             }
 686         }
 687
 688         if(tls+brs!=nsize){
 689             /* Bad fit; just size proportionally. */
 690             if(sz<=2){
 691                 tls=nsize/2;
 692                 brs=nsize-tls;
 693             }else{
 694                 tls=split_size(tl, node->dir)*nsize/sz;
 695                 brs=nsize-tls;
 696             }
 697         }
 698
 699         if(dir==SPLIT_VERTICAL){
 700             tlg.h=tls;
 701             brg.y+=tls;
 702             brg.h=brs;
 703         }else{
 704             tlg.w=tls;
 705             brg.x+=tls;
 706             brg.w=brs;
 707         }
 708
 709         split_do_resize(tl, &tlg, hprimn, vprimn, transpose);
 710         split_do_resize(br, &brg, hprimn, vprimn, transpose);
 711
 712         node->dir=dir;
 713         ((WSplit*)node)->geom=*ng;
 714         split_update_bounds((WSplit*)node, FALSE);
 715     }
 716 }
 717
 718
 719 void split_do_resize(WSplit *node, const WRectangle *ng,
 720                      WPrimn hprimn, WPrimn vprimn, bool transpose)
 721 {
 722     CALL_DYN(split_do_resize, node, (node, ng, hprimn, vprimn, transpose));
 723 }
 724
 725
 726 void split_resize(WSplit *node, const WRectangle *ng,
 727                   WPrimn hprimn, WPrimn vprimn)
 728 {
 729     split_update_bounds(node, TRUE);
 730     splittree_begin_resize();
 731     split_do_resize(node, ng, hprimn, vprimn, FALSE);
 732     splittree_end_resize();
 733 }
 734
 735
 736 /*}}}*/
 737
 738
 739 /*{{{ Save, restore and verify code for maximization */
 740
 741
 742 bool splits_are_related(WSplit *p, WSplit *node)
 743 {
 744     if(p==node)
 745         return TRUE;
 746
 747     return
 748         node->parent!=NULL
 749         ? splits_are_related(p, (WSplit*)node->parent)
 750         : FALSE;
 751 }
 752
 753
 754 WSplit *maxparentdir_rel(WSplit *p, WSplit *node, int dir)
 755 {
 756     /* Descending from p, try to determine the first split of type dir between
 757      * p and node, while ignoring a potential stdisp. */
 758     if(OBJ_IS(p, WSplitSplit)){
 759         WSplitSplit *sp=(WSplitSplit*)p;
 760         assert(sp->tl!=NULL && sp->br!=NULL);
 761         assert(splits_are_related(sp->tl, node) ||
 762                splits_are_related(sp->br, node));
 763
 764         if(OBJ_IS(sp->tl, WSplitST))
 765             return maxparentdir_rel(sp->br, node, dir);
 766         if(OBJ_IS(sp->br, WSplitST))
 767             return maxparentdir_rel(sp->tl, node, dir);
 768
 769         if(sp->dir!=dir){
 770             return
 771                 splits_are_related(sp->tl, node)
 772                 ? maxparentdir_rel(sp->tl, node, dir)
 773                 : maxparentdir_rel(sp->br, node, dir);
 774         }
 775     }
 776
 777     return p;
 778 }
 779
 780
 781 WSplit *maxparent(WSplit *node)
 782 {
 783     WSplit *p=(WSplit*)node->parent;
 784     return p==NULL ? node : maxparent(p);
 785 }
 786
 787
 788 WSplit *maxparentdir(WSplit *node, int dir)
 789 {
 790     return maxparentdir_rel(maxparent(node), node, dir);
 791 }
 792
 793 int *wh(WRectangle *geom, int orientation)
 794 {
 795     return orientation==REGION_ORIENTATION_HORIZONTAL ? &geom->w : &geom->h;
 796 }
 797
 798 int *xy(WRectangle *geom, int orientation)
 799 {
 800     return orientation==REGION_ORIENTATION_HORIZONTAL ? &geom->x : &geom->y;
 801 }
 802
 803 bool is_lt(int orientation, int corner)
 804 {
 805     /* Read as "is_left" or "is_top", depending on the orientation. */
 806     return
 807         orientation==REGION_ORIENTATION_HORIZONTAL
 808         ? corner==MPLEX_STDISP_TL || corner==MPLEX_STDISP_BL
 809         : corner==MPLEX_STDISP_TL || corner==MPLEX_STDISP_TR;
 810 }
 811
 812 int flip_orientation(int orientation)
 813 {
 814     return
 815         orientation==REGION_ORIENTATION_HORIZONTAL
 816         ? REGION_ORIENTATION_VERTICAL
 817         : REGION_ORIENTATION_HORIZONTAL;
 818 }
 819
 820 WRectangle stdisp_recommended_geom(WSplitST *st, WRectangle wsg)
 821 {
 822     /* wsg holds the geometry of the workspace that st is on. */
 823     WRectangle stg=REGION_GEOM(st->regnode.reg);
 824     int ori=st->orientation;
 825     stg.w=stdisp_recommended_w(st);
 826     stg.h=stdisp_recommended_h(st);
 827
 828     if(!is_lt(ori, st->corner))
 829         *xy(&stg, ori)=*wh(&wsg, ori)-*wh(&stg, ori);
 830
 831     return stg;
 832 }
 833
 834 bool geom_overlaps_stgeom_xy(WRectangle geom, WSplitST *st, WRectangle stg)
 835 {
 836     /*    TRUE                         FALSE
 837      *
 838      *     ------                           ------
 839      *     |geom|                           |geom|
 840      *     ------                           ------
 841      *  -----                        -----
 842      *  |stg|                        |stg|
 843      *  -----                        -----
 844      */
 845     int ori=st->orientation;
 846
 847     return
 848         is_lt(ori, st->corner)
 849         ? *xy(&geom, ori)<*wh(&stg, ori)
 850         : *xy(&geom, ori)+*wh(&geom, ori)>*xy(&stg, ori);
 851 }
 852
 853 bool geom_aligned_stdisp(WRectangle geom, WSplitST *st)
 854 {
 855     /*        TRUE               FALSE              FALSE
 856      *
 857      *                                                  ------
 858      *                                                  |geom|
 859      *           ------                                 ------
 860      *           |geom|              ------
 861      *    -----  ------       -----  |geom|      -----
 862      *    |stg|               |stg|  ------      |stg|
 863      *    -----               -----              -----
 864      *
 865      */
 866     WRectangle stg=REGION_GEOM(st->regnode.reg);
 867     int ori=flip_orientation(st->orientation);
 868
 869     return
 870         is_lt(ori, st->corner)
 871         ? *xy(&geom, ori)==*wh(&stg, ori)
 872         : *xy(&geom, ori)+*wh(&geom, ori)==*xy(&stg, ori);
 873 }
 874
 875 void grow_by_stdisp_wh(WRectangle *geom, WSplitST *st)
 876 {
 877     /*          BEFORE                      AFTER
 878      *
 879      *
 880      *              ------                     ------
 881      *              |geom|                     |    |
 882      *      -----  ------               -----  |geom|
 883      *      |stg|                       |stg|  |    |
 884      *      -----                       -----  ------
 885      *
 886      */
 887     WRectangle stg=REGION_GEOM(st->regnode.reg);
 888     int ori=flip_orientation(st->orientation);
 889
 890     if(is_lt(ori, st->corner))
 891         *xy(geom, ori)=0;
 892     *wh(geom, ori)+=*wh(&stg, ori);
 893 }
 894
 895 bool frame_neighbors_stdisp(WFrame *frame, WSplitST *st)
 896 {
 897     return
 898         geom_overlaps_stgeom_xy(REGION_GEOM(frame), st, REGION_GEOM(st)) &&
 899         geom_aligned_stdisp(REGION_GEOM(frame), st);
 900 }
 901
 902 bool geom_clashes_stdisp(WRectangle geom, WSplitST *st)
 903 {
 904     WRectangle stg=REGION_GEOM(st->regnode.reg);
 905     int ori=flip_orientation(st->orientation);
 906     return
 907         is_lt(ori, st->corner)
 908         ? *xy(&geom, ori)==0
 909         : *xy(&geom, ori)+*wh(&geom, ori)==*xy(&stg, ori)+*wh(&stg, ori);
 910 }
 911
 912 bool is_same_dir(int dir, int ori)
 913 {
 914     return
 915         (dir==SPLIT_HORIZONTAL && ori==REGION_ORIENTATION_HORIZONTAL) ||
 916         (dir==SPLIT_VERTICAL && ori==REGION_ORIENTATION_VERTICAL);
 917 }
 918
 919 bool is_maxed(WFrame *frame, int dir)
 920 {
 921     return
 922         dir==SPLIT_HORIZONTAL
 923         ? frame->flags&FRAME_MAXED_HORIZ && frame->flags&FRAME_SAVED_HORIZ
 924         : frame->flags&FRAME_MAXED_VERT && frame->flags&FRAME_SAVED_VERT;
 925 }
 926
 927 bool update_geom_from_stdisp(WFrame *frame, WRectangle *ng, int dir)
 928 {
 929     WRegion *ws=REGION_MANAGER(frame);
 930     WSplitST *st;
 931     WRectangle stg;
 932     WRectangle rstg;
 933     WRectangle ngr;
 934     int ori;
 935
 936     if(!OBJ_IS(ws, WTiling) || ((WTiling*)ws)->stdispnode==NULL)
 937         return FALSE;
 938
 939     st=((WTiling*)ws)->stdispnode;
 940
 941     if(st->fullsize || !frame_neighbors_stdisp(frame, st))
 942         return FALSE;
 943
 944     rstg=stdisp_recommended_geom(st, ws->geom);
 945
 946     if(is_same_dir(dir, st->orientation) &&
 947        !geom_overlaps_stgeom_xy(*ng, st, rstg))
 948     {
 949         grow_by_stdisp_wh(ng, st);
 950         if(is_maxed(frame, other_dir(dir)) &&
 951            geom_aligned_stdisp(frame->saved_geom, st))
 952         {
 953             grow_by_stdisp_wh(&frame->saved_geom, st);
 954         }
 955         return TRUE;
 956     }
 957
 958     if(!is_same_dir(dir, st->orientation) &&
 959        geom_clashes_stdisp(frame->saved_geom, st))
 960     {
 961         stg=REGION_GEOM(st->regnode.reg);
 962         ori=flip_orientation(st->orientation);
 963         if(is_lt(ori, st->corner))
 964             *xy(ng, ori)+=*wh(&stg, ori);
 965         /* We've checked that this makes sense when verifying the saved layout. */
 966         *wh(ng, ori)-=*wh(&stg, ori);
 967     }
 968
 969     return FALSE;
 970 }
 971
 972 bool splitregion_do_restore(WSplitRegion *node, int dir)
 973 {
 974     WFrame *frame;
 975     WRectangle geom=((WSplit*)node)->geom;
 976     WRectangle fakegeom;
 977     bool ret;
 978     bool other_max;
 979
 980     if(!OBJ_IS(node->reg, WFrame))
 981         return FALSE;
 982
 983     frame=(WFrame*)node->reg;
 984     if(dir==SPLIT_HORIZONTAL){
 985         geom.x=frame->saved_geom.x;
 986         geom.w=frame->saved_geom.w;
 987     }else{
 988         geom.y=frame->saved_geom.y;
 989         geom.h=frame->saved_geom.h;
 990     }
 991
 992     other_max=
 993         dir==SPLIT_HORIZONTAL
 994         ? frame->flags&FRAME_MAXED_VERT
 995         : frame->flags&FRAME_MAXED_HORIZ;
 996
 997     fakegeom=geom;
 998     ret=update_geom_from_stdisp(frame, &geom, dir);
 999
1000     /* Tell the region the correct geometry to avoid redrawing it again when
1001      * the stdisp is resized by split_regularise_stdisp. Some clients (notably
1002      * ncurses based ones) don't seem to react well to being resized multiple
1003      * times within a short amount of time and don't refresh themselves
1004      * correctly. */
1005     region_fit(node->reg, &geom, REGION_FIT_EXACT);
1006
1007     split_update_bounds(&(node->split), FALSE);
1008
1009     /* Keep the old geometry for the WSplit. Otherwise the tiling would be
1010      * inconsistent, by for example having horizontal WSplitSplit's whose
1011      * children have different heights. The call to split_regularise_stdisp
1012      * below will take care of correcting the geometry of the WSplit and it
1013      * behaves badly when the tiling is inconsistent. */
1014     node->split.geom=ret ? fakegeom : geom;
1015
1016     frame->flags|=other_max;
1017     return ret;
1018 }
1019
1020 bool splitst_do_restore(WSplit *node, int dir)
1021 {
1022     return FALSE;
1023 }
1024
1025 bool splitsplit_do_restore(WSplitSplit *node, int dir)
1026 {
1027     bool ret1, ret2, ret=FALSE;
1028     WSplit *snode=(WSplit*)node;
1029
1030     WSplitST *st;
1031     WSplit *other;
1032     WRectangle stg;
1033     WRectangle og;
1034
1035     assert(node->tl!=NULL && node->br!=NULL);
1036
1037     if(stdisp_immediate_child(node)){
1038         if(OBJ_IS(node->tl, WSplitST)){
1039             st=(WSplitST*)node->tl;
1040             other=node->br;
1041         }else{
1042             st=(WSplitST*)node->br;
1043             other=node->tl;
1044         }
1045         stg=((WSplit*)st)->geom;
1046         split_do_restore(other, dir);
1047         og=other->geom;
1048         if(node->dir==SPLIT_HORIZONTAL){
1049             stg.y=og.y;
1050             stg.h=og.h;
1051         }else{
1052             stg.x=og.x;
1053             stg.w=og.w;
1054         }
1055         if(rectangle_compare(&stg, &((WSplit*)st)->geom)){
1056             splitst_do_resize(st, &stg, PRIMN_ANY, PRIMN_ANY, FALSE);
1057             ret=TRUE;
1058         }
1059     }else{
1060         /* Avoid short-circuit evaluation. */
1061         ret1=split_do_restore(node->tl, dir);
1062         ret2=split_do_restore(node->br, dir);
1063         ret=ret1 || ret2;
1064     }
1065
1066     snode->geom.x=node->tl->geom.x;
1067     snode->geom.y=node->tl->geom.y;
1068     if(node->dir==SPLIT_HORIZONTAL){
1069         snode->geom.w=node->tl->geom.w+node->br->geom.w;
1070         snode->geom.h=node->tl->geom.h;
1071     }
1072     if(node->dir==SPLIT_VERTICAL){
1073         snode->geom.w=node->tl->geom.w;
1074         snode->geom.h=node->tl->geom.h+node->br->geom.h;
1075     }
1076
1077     return ret;
1078 }
1079
1080 bool split_do_restore(WSplit *node, int dir)
1081 {
1082     bool ret = FALSE;
1083     CALL_DYN_RET(ret, bool, split_do_restore, node, (node, dir));
1084     return ret;
1085 }
1086
1087
1088 void splitregion_do_maxhelper(WSplitRegion *node, int dir, int action)
1089 {
1090     WFrame *frame;
1091     if(!OBJ_IS(node->reg, WFrame))
1092         return;
1093     frame=(WFrame*)node->reg;
1094
1095     if(action==SAVE){
1096         frame->flags|=FRAME_KEEP_FLAGS;
1097         if(dir==HORIZONTAL){
1098             frame->flags|=(FRAME_MAXED_HORIZ|FRAME_SAVED_HORIZ);
1099             frame->saved_geom.x=REGION_GEOM(frame).x;
1100             frame->saved_geom.w=REGION_GEOM(frame).w;
1101         }else{
1102             frame->flags|=(FRAME_MAXED_VERT|FRAME_SAVED_VERT);
1103             frame->saved_geom.y=REGION_GEOM(frame).y;
1104             frame->saved_geom.h=REGION_GEOM(frame).h;
1105         }
1106     }
1107     if(action==SET_KEEP)
1108         frame->flags|=FRAME_KEEP_FLAGS;
1109     if(action==RM_KEEP)
1110         frame->flags&=~FRAME_KEEP_FLAGS;
1111 }
1112
1113 void splitst_do_maxhelper(WSplit *node, int dir, int action)
1114 {
1115     return;
1116 }
1117
1118 void splitsplit_do_maxhelper(WSplitSplit *node, int dir, int action)
1119 {
1120     assert(node->tl!=NULL && node->br!=NULL);
1121     split_do_maxhelper(node->tl, dir, action);
1122     split_do_maxhelper(node->br, dir, action);
1123 }
1124
1125 void split_do_maxhelper(WSplit *node, int dir, int action)
1126 {
1127     CALL_DYN(split_do_maxhelper, node, (node, dir, action));
1128 }
1129
1130
1131 bool savedgeom_clashes_stdisp(WFrame *frame, int dir)
1132 {
1133     WRegion *ws=REGION_MANAGER(frame);
1134     WSplitST *st;
1135     int ori;
1136
1137     if(!OBJ_IS(ws, WTiling) || ((WTiling*)ws)->stdispnode==NULL)
1138         return TRUE;
1139
1140     st=((WTiling*)ws)->stdispnode;
1141     ori=flip_orientation(st->orientation);
1142
1143     return
1144         !is_same_dir(dir, st->orientation) &&
1145         frame_neighbors_stdisp(frame, st) &&
1146         geom_clashes_stdisp(frame->saved_geom, st)
1147         ? *wh(&frame->saved_geom, ori)<*wh(&REGION_GEOM(st), ori)
1148         : FALSE;
1149 }
1150
1151 bool splitregion_do_verify(WSplitRegion *node, int dir)
1152 {
1153     WFrame *frame;
1154     bool ret=FALSE;
1155
1156     if(!OBJ_IS(node->reg, WFrame))
1157         return FALSE;
1158
1159     frame=(WFrame*)node->reg;
1160
1161     ret=is_maxed(frame, dir);
1162
1163     if(dir==HORIZONTAL)
1164         frame->flags&=~(FRAME_MAXED_HORIZ|FRAME_SAVED_HORIZ);
1165     else
1166         frame->flags&=~(FRAME_MAXED_VERT|FRAME_SAVED_VERT);
1167
1168     if(savedgeom_clashes_stdisp(frame, dir))
1169         return FALSE;
1170
1171     return ret;
1172 }
1173
1174 bool splitst_do_verify(WSplit *node, int dir)
1175 {
1176     return TRUE;
1177 }
1178
1179 bool splitsplit_do_verify(WSplitSplit *node, int dir)
1180 {
1181     bool ret1, ret2;
1182     assert(node->tl!=NULL && node->br!=NULL);
1183
1184     /* Avoid short-circuit evaluation. */
1185     ret1=split_do_verify(node->tl, dir);
1186     ret2=split_do_verify(node->br, dir);
1187     return ret1 && ret2;
1188 }
1189
1190 bool split_do_verify(WSplit *node, int dir)
1191 {
1192     bool ret = FALSE;
1193     CALL_DYN_RET(ret, bool, split_do_verify, node, (node, dir));
1194     return ret;
1195 }
1196
1197
1198 bool split_maximize(WSplit *node, int dir, int action)
1199 {
1200     WSplit *p=maxparentdir(node, dir);
1201     if(action==RESTORE)
1202         return split_do_restore(p, dir);
1203     if(action==VERIFY)
1204         return split_do_verify(p, dir);
1205
1206     split_do_maxhelper(p, dir, action);
1207     return TRUE;
1208 }
1209
1210
1211 /*}}}*/
1212
1213
1214 /*{{{ Low-level resize code; request towards root */
1215
1216
1217 static void flexibility(WSplit *node, int dir, int *shrink, int *stretch)
1218 {
1219     if(dir==SPLIT_VERTICAL){
1220         *shrink=maxof(0, node->geom.h-node->min_h);
1221         if(OBJ_IS(node, WSplitST))
1222             *stretch=maxof(0, node->max_h-node->geom.h);
1223         else
1224             *stretch=INT_MAX;
1225     }else{
1226         *shrink=maxof(0, node->geom.w-node->min_w);
1227         if(OBJ_IS(node, WSplitST))
1228             *stretch=maxof(0, node->max_w-node->geom.w);
1229         else
1230             *stretch=INT_MAX;
1231     }
1232 }
1233
1234
1235 static void calc_amount(int *amount, int rs, WSplit *other, int dir)
1236 {
1237     int shrink, stretch;
1238
1239     flexibility(other, dir, &shrink, &stretch);
1240
1241     if(rs>0)
1242         *amount=minof(rs, shrink);
1243     else if(rs<0)
1244         *amount=-minof(-rs, stretch);
1245     else
1246         *amount=0;
1247 }
1248
1249
1250
1251 static void splitsplit_do_rqsize(WSplitSplit *p, WSplit *node,
1252                                  RootwardAmount *ha, RootwardAmount *va,
1253                                  WRectangle *rg, bool tryonly)
1254 {
1255     WPrimn hprimn=PRIMN_ANY, vprimn=PRIMN_ANY;
1256     WRectangle og, pg, ng;
1257     RootwardAmount *ca;
1258     WSplit *other;
1259     WPrimn thisnode;
1260     int amount;
1261
1262     assert(!ha->any || ha->tl==0);
1263     assert(!va->any || va->tl==0);
1264     assert(p->tl==node || p->br==node);
1265
1266     if(p->tl==node){
1267         other=p->br;
1268         thisnode=PRIMN_TL;
1269     }else{
1270         other=p->tl;
1271         thisnode=PRIMN_BR;
1272     }
1273
1274     ca=(p->dir==SPLIT_VERTICAL ? va : ha);
1275
1276     if(thisnode==PRIMN_TL || ca->any){
1277         calc_amount(&amount, ca->br, other, p->dir);
1278         ca->br-=amount;
1279     }else/*if(thisnode==PRIMN_BR)*/{
1280         calc_amount(&amount, ca->tl, other, p->dir);
1281         ca->tl-=amount;
1282     }
1283
1284     if(((WSplit*)p)->parent==NULL /*||
1285        (ha->tl==0 && ha->br==0 && va->tl==0 && va->br==0)*/){
1286         if(((WSplit*)p)->ws_if_root!=NULL)
1287             pg=REGION_GEOM((WTiling*)(((WSplit*)p)->ws_if_root));
1288         else
1289             pg=((WSplit*)p)->geom;
1290     }else{
1291         splitinner_do_rqsize(((WSplit*)p)->parent, (WSplit*)p, ha, va,
1292                              &pg, tryonly);
1293     }
1294
1295     assert(pg.w>=0 && pg.h>=0);
1296
1297     og=pg;
1298     ng=pg;
1299
1300     if(p->dir==SPLIT_VERTICAL){
1301         ng.h=maxof(0, node->geom.h+amount);
1302         og.h=maxof(0, other->geom.h-amount);
1303         adjust_sizes(&(ng.h), &(og.h), pg.h, ng.h+og.h,
1304                      node->min_h, other->min_h, node->max_h, other->max_h,
1305                      PRIMN_TL /* node is passed as tl param */);
1306         if(thisnode==PRIMN_TL)
1307             og.y=pg.y+pg.h-og.h;
1308         else
1309             ng.y=pg.y+pg.h-ng.h;
1310         vprimn=thisnode;
1311     }else{
1312         ng.w=maxof(0, node->geom.w+amount);
1313         og.w=maxof(0, other->geom.w-amount);
1314         adjust_sizes(&(ng.w), &(og.w), pg.w, ng.w+og.w,
1315                      node->min_w, other->min_w, node->max_w, other->max_w,
1316                      PRIMN_TL /* node is passed as tl param */);
1317         if(thisnode==PRIMN_TL)
1318             og.x=pg.x+pg.w-og.w;
1319         else
1320             ng.x=pg.x+pg.w-ng.w;
1321         hprimn=thisnode;
1322     }
1323
1324     if(!tryonly){
1325         /* Entä jos 'other' on stdisp? */
1326         split_do_resize(other, &og, hprimn, vprimn, FALSE);
1327
1328         ((WSplit*)p)->geom=pg;
1329     }
1330
1331     *rg=ng;
1332 }
1333
1334
1335 void splitinner_do_rqsize(WSplitInner *p, WSplit *node,
1336                           RootwardAmount *ha, RootwardAmount *va,
1337                           WRectangle *rg, bool tryonly)
1338 {
1339     CALL_DYN(splitinner_do_rqsize, p, (p, node, ha, va, rg, tryonly));
1340 }
1341
1342
1343 static void initra(RootwardAmount *ra, int p, int s, int op, int os,
1344                    bool any)
1345 {
1346     ra->any=any;
1347     ra->tl=op-p;
1348     ra->br=(p+s)-(op+os);
1349     if(any){
1350         ra->br+=ra->tl;
1351         ra->tl=0;
1352     }
1353 }
1354
1355
1356 void split_do_rqgeom_(WSplit *node, const WRectangle *ng,
1357                       bool hany, bool vany, WRectangle *rg,
1358                       bool tryonly)
1359 {
1360     RootwardAmount ha, va;
1361
1362     if(node->parent==NULL){
1363         if(node->ws_if_root!=NULL)
1364             *rg=REGION_GEOM((WTiling*)(node->ws_if_root));
1365         else
1366             *rg=*ng;
1367     }else{
1368         initra(&ha, ng->x, ng->w, node->geom.x, node->geom.w, hany);
1369         initra(&va, ng->y, ng->h, node->geom.y, node->geom.h, vany);
1370
1371         splitinner_do_rqsize(node->parent, node, &ha, &va, rg, tryonly);
1372     }
1373 }
1374
1375
1376 /*}}}*/
1377
1378
1379 /*{{{ Resize interface */
1380
1381
1382 static void bnd(int *pos, int *sz, int opos, int osz, int minsz, int maxsz)
1383 {
1384     int ud=abs(*pos-opos);
1385     int dd=abs((*pos+*sz)-(opos+osz));
1386     int szrq=*sz;
1387
1388     if(ud+dd!=0){
1389         bound(sz, minsz, maxsz);
1390         *pos+=(szrq-*sz)*ud/(ud+dd);
1391     }
1392 }
1393
1394
1395 WSplit *split_find_root(WSplit *split)
1396 {
1397     if(split->parent==NULL)
1398         return split;
1399     return split_find_root((WSplit*)split->parent);
1400 }
1401
1402
1403 void splittree_rqgeom(WSplit *sub, int flags, const WRectangle *geom_,
1404                       WRectangle *geomret)
1405 {
1406     bool hany=flags&REGION_RQGEOM_WEAK_X;
1407     bool vany=flags&REGION_RQGEOM_WEAK_Y;
1408     bool tryonly=flags&REGION_RQGEOM_TRYONLY;
1409     WRectangle geom=*geom_;
1410     WRectangle retg;
1411     WSplit *root=split_find_root(sub);
1412
1413     if(geomret==NULL)
1414         geomret=&retg;
1415
1416     split_update_bounds(root, TRUE);
1417
1418     if(OBJ_IS(sub, WSplitST)){
1419         WSplitST *sub_as_stdisp=(WSplitST*)sub;
1420
1421         if(flags&REGION_RQGEOM_TRYONLY){
1422             warn(TR("REGION_RQGEOM_TRYONLY unsupported for status display."));
1423             *geomret=sub->geom;
1424             return;
1425         }
1426         split_regularise_stdisp(sub_as_stdisp);
1427         geom=sub->geom;
1428         if(sub_as_stdisp->orientation==REGION_ORIENTATION_HORIZONTAL){
1429             if(geom_->h==geom.h)
1430                 return;
1431             geom.h=geom_->h;
1432         }else{
1433             if(geom_->w==geom.w)
1434                 return;
1435             geom.w=geom_->w;
1436         }
1437         split_update_bounds(root, TRUE);
1438     }
1439
1440     /* Handle internal size bounds */
1441     bnd(&(geom.x), &(geom.w), sub->geom.x, sub->geom.w,
1442         sub->min_w, sub->max_w);
1443     bnd(&(geom.y), &(geom.h), sub->geom.y, sub->geom.h,
1444         sub->min_h, sub->max_h);
1445
1446     /* Check if we should resize to both tl and br */
1447
1448     if(hany){
1449         geom.w+=sub->geom.x-geom.x;
1450         geom.x=sub->geom.x;
1451     }
1452
1453     if(vany){
1454         geom.h+=sub->geom.y-geom.y;
1455         geom.y=sub->geom.y;
1456     }
1457
1458     splittree_begin_resize();
1459
1460     split_do_rqgeom_(sub, &geom, hany, vany, geomret, tryonly);
1461
1462     if(!tryonly){
1463         split_do_resize(sub, geomret, hany, vany, FALSE);
1464         splittree_end_resize();
1465         *geomret=sub->geom;
1466     }else{
1467         saw_stdisp=NULL;
1468     }
1469 }
1470
1471
1472 /*EXTL_DOC
1473  * Attempt to resize and/or move the split tree starting at \var{node}.
1474  * Behaviour and the \var{g} parameter are as for \fnref{WRegion.rqgeom}
1475  * operating on \var{node} (if it were a \type{WRegion}).
1476  */
1477 EXTL_EXPORT_MEMBER
1478 ExtlTab split_rqgeom(WSplit *node, ExtlTab g)
1479 {
1480     WRectangle geom, ogeom;
1481     int flags=REGION_RQGEOM_WEAK_ALL;
1482
1483     geom=node->geom;
1484     ogeom=geom;
1485
1486     if(extl_table_gets_i(g, "x", &(geom.x)))
1487         flags&=~REGION_RQGEOM_WEAK_X;
1488     if(extl_table_gets_i(g, "y", &(geom.y)))
1489         flags&=~REGION_RQGEOM_WEAK_Y;
1490     if(extl_table_gets_i(g, "w", &(geom.w)))
1491         flags&=~REGION_RQGEOM_WEAK_W;
1492     if(extl_table_gets_i(g, "h", &(geom.h)))
1493         flags&=~REGION_RQGEOM_WEAK_H;
1494
1495     geom.w=maxof(1, geom.w);
1496     geom.h=maxof(1, geom.h);
1497
1498     splittree_rqgeom(node, flags, &geom, &ogeom);
1499
1500     return extl_table_from_rectangle(&ogeom);
1501 }
1502
1503
1504 /*}}}*/
1505
1506
1507 /*{{{ Split */
1508
1509
1510 void splittree_changeroot(WSplit *root, WSplit *node)
1511 {
1512     WTiling *ws=(WTiling*)(root->ws_if_root);
1513
1514     assert(ws!=NULL);
1515     assert(ws->split_tree==root);
1516     root->ws_if_root=NULL;
1517     ws->split_tree=node;
1518     if(node!=NULL){
1519         node->ws_if_root=ws;
1520         node->parent=NULL;
1521     }
1522 }
1523
1524
1525 static void splitsplit_replace(WSplitSplit *split, WSplit *child,
1526                                WSplit *what)
1527 {
1528     assert(split->tl==child || split->br==child);
1529
1530     if(split->tl==child)
1531         split->tl=what;
1532     else
1533         split->br=what;
1534
1535     child->parent=NULL;
1536
1537     what->parent=(WSplitInner*)split;
1538     what->ws_if_root=NULL; /* May not be needed. */
1539 }
1540
1541
1542 void splitinner_replace(WSplitInner *split, WSplit *child, WSplit *what)
1543 {
1544     CALL_DYN(splitinner_replace, split, (split, child, what));
1545 }
1546
1547
1548 WSplitRegion *splittree_split(WSplit *node, int dir, WPrimn primn,
1549                               int minsize, WRegionSimpleCreateFn *fn,
1550                               WWindow *parent)
1551 {
1552     int objmin;
1553     int s, sn, so;
1554     WSplitSplit *nsplit;
1555     WSplitRegion *nnode;
1556     WSplitInner *psplit;
1557     WRegion *nreg;
1558     WFitParams fp;
1559     WRectangle ng, rg;
1560
1561     assert(node!=NULL && parent!=NULL);
1562
1563     splittree_begin_resize();
1564
1565     node=dodge_stdisp(node, FALSE);
1566
1567     if(node==NULL)
1568         return NULL;
1569
1570     if(OBJ_IS(node, WSplitST)){
1571         warn(TR("Splitting the status display is not allowed."));
1572         return NULL;
1573     }
1574
1575     if(primn!=PRIMN_TL && primn!=PRIMN_BR)
1576         primn=PRIMN_BR;
1577     if(dir!=SPLIT_HORIZONTAL && dir!=SPLIT_VERTICAL)
1578         dir=SPLIT_VERTICAL;
1579
1580     split_update_bounds(split_find_root(node), TRUE);
1581     objmin=(dir==SPLIT_VERTICAL ? node->min_h : node->min_w);
1582
1583     s=split_size(node, dir);
1584     sn=maxof(minsize, s/2);
1585     so=maxof(objmin, s-sn);
1586
1587     if(sn+so!=s){
1588         int rs;
1589         ng=node->geom;
1590         if(dir==SPLIT_VERTICAL)
1591             ng.h=sn+so;
1592         else
1593             ng.w=sn+so;
1594         split_do_rqgeom_(node, &ng, TRUE, TRUE, &rg, TRUE);
1595         rs=(dir==SPLIT_VERTICAL ? rg.h : rg.w);
1596         if(rs<minsize+objmin){
1597             warn(TR("Unable to split: not enough free space."));
1598             return NULL;
1599         }
1600         split_do_rqgeom_(node, &ng, TRUE, TRUE, &rg, FALSE);
1601         rs=(dir==SPLIT_VERTICAL ? rg.h : rg.w);
1602         if(minsize>rs/2){
1603             sn=minsize;
1604             so=rs-sn;
1605         }else{
1606             so=maxof(rs/2, objmin);
1607             sn=rs-so;
1608         }
1609     }else{
1610         rg=node->geom;
1611         splittree_scan_stdisp_rootward(node);
1612     }
1613
1614     /* Create split and new window
1615      */
1616     fp.mode=REGION_FIT_EXACT;
1617     fp.g=rg;
1618
1619     nsplit=create_splitsplit(&(fp.g), dir);
1620
1621     if(nsplit==NULL)
1622         return NULL;
1623
1624     if(dir==SPLIT_VERTICAL){
1625         if(primn==PRIMN_BR)
1626             fp.g.y+=so;
1627         fp.g.h=sn;
1628     }else{
1629         if(primn==PRIMN_BR)
1630             fp.g.x+=so;
1631         fp.g.w=sn;
1632     }
1633
1634     nreg=fn(parent, &fp);
1635
1636     if(nreg==NULL){
1637         destroy_obj((Obj*)nsplit);
1638         return NULL;
1639     }
1640
1641     nnode=create_splitregion(&(fp.g), nreg);
1642     if(nnode==NULL){
1643         destroy_obj((Obj*)nreg);
1644         destroy_obj((Obj*)nsplit);
1645         return NULL;
1646     }
1647
1648     /* Now that everything's ok, resize and move original node.
1649      */
1650     ng=rg;
1651     if(dir==SPLIT_VERTICAL){
1652         ng.h=so;
1653         if(primn==PRIMN_TL)
1654             ng.y+=sn;
1655     }else{
1656         ng.w=so;
1657         if(primn==PRIMN_TL)
1658             ng.x+=sn;
1659     }
1660
1661     split_do_resize(node, &ng,
1662                     (dir==SPLIT_HORIZONTAL ? primn : PRIMN_ANY),
1663                     (dir==SPLIT_VERTICAL ? primn : PRIMN_ANY),
1664                     FALSE);
1665
1666     /* Set up split structure
1667      */
1668     psplit=node->parent;
1669
1670     if(psplit!=NULL)
1671         splitinner_replace(psplit, node, (WSplit*)nsplit);
1672     else
1673         splittree_changeroot(node, (WSplit*)nsplit);
1674
1675     node->parent=(WSplitInner*)nsplit;
1676     ((WSplit*)nnode)->parent=(WSplitInner*)nsplit;
1677
1678     if(primn==PRIMN_BR){
1679         nsplit->tl=node;
1680         nsplit->br=(WSplit*)nnode;
1681         nsplit->current=SPLIT_CURRENT_TL;
1682     }else{
1683         nsplit->tl=(WSplit*)nnode;
1684         nsplit->br=node;
1685         nsplit->current=SPLIT_CURRENT_BR;
1686     }
1687
1688     splittree_end_resize();
1689
1690     return nnode;
1691 }
1692
1693
1694 /*}}}*/
1695
1696
1697 /*{{{ Remove */
1698
1699
1700 static void splitsplit_remove(WSplitSplit *node, WSplit *child,
1701                               bool reclaim_space)
1702 {
1703     static int nstdisp=0;
1704     WSplitInner *parent;
1705     WSplit *other;
1706     int hprimn=PRIMN_ANY, vprimn=PRIMN_ANY;
1707
1708     assert(node->tl==child || node->br==child);
1709
1710     if(node->tl==child){
1711         other=node->br;
1712         if(node->dir==SPLIT_VERTICAL)
1713             vprimn=PRIMN_TL;
1714         else
1715             hprimn=PRIMN_TL;
1716     }else{
1717         other=node->tl;
1718         if(node->dir==SPLIT_VERTICAL)
1719             vprimn=PRIMN_BR;
1720         else
1721             hprimn=PRIMN_BR;
1722     }
1723
1724     assert(other!=NULL);
1725
1726     if(nstdisp==0 && reclaim_space && OBJ_IS(other, WSplitST)){
1727         /* Try to move stdisp out of the way. */
1728         split_try_unsink_stdisp(node, FALSE, TRUE);
1729         assert(child->parent!=NULL);
1730         nstdisp++;
1731         splitinner_remove(child->parent, child, reclaim_space);
1732         nstdisp--;
1733         return;
1734     }
1735
1736     parent=((WSplit*)node)->parent;
1737
1738     if(parent!=NULL)
1739         splitinner_replace(parent, (WSplit*)node, other);
1740     else
1741         splittree_changeroot((WSplit*)node, other);
1742
1743     if(reclaim_space)
1744         split_resize(other, &(((WSplit*)node)->geom), hprimn, vprimn);
1745
1746     child->parent=NULL;
1747
1748     node->tl=NULL;
1749     node->br=NULL;
1750     ((WSplit*)node)->parent=NULL;
1751     destroy_obj((Obj*)node);
1752 }
1753
1754
1755 void splitinner_remove(WSplitInner *node, WSplit *child, bool reclaim_space)
1756 {
1757     CALL_DYN(splitinner_remove, node, (node, child, reclaim_space));
1758 }
1759
1760
1761 void splittree_remove(WSplit *node, bool reclaim_space)
1762 {
1763     if(node->parent!=NULL)
1764         splitinner_remove(node->parent, node, reclaim_space);
1765     else if(node->ws_if_root!=NULL)
1766         splittree_changeroot(node, NULL);
1767
1768     destroy_obj((Obj*)node);
1769 }
1770
1771
1772 /*}}}*/
1773
1774
1775 /*{{{ Tree traversal */
1776
1777
1778 static bool defaultfilter(WSplit *node)
1779 {
1780     return (OBJ_IS(node, WSplitRegion) &&
1781             ((WSplitRegion*)node)->reg!=NULL);
1782 }
1783
1784
1785 static WSplit *split_current_todir_default(WSplit *node,
1786                                            WPrimn hprimn, WPrimn vprimn,
1787                                            WSplitFilter *filter)
1788 {
1789     if(filter==NULL)
1790         filter=defaultfilter;
1791
1792     return (filter(node) ? node : NULL);
1793 }
1794
1795
1796 static WSplit *splitsplit_current_todir(WSplitSplit *node,
1797                                         WPrimn hprimn, WPrimn vprimn,
1798                                         WSplitFilter *filter)
1799 {
1800     WPrimn primn=(node->dir==SPLIT_HORIZONTAL ? hprimn : vprimn);
1801     WSplit *first, *second, *ret;
1802
1803     if(primn==PRIMN_TL ||
1804        (primn==PRIMN_ANY && node->current==SPLIT_CURRENT_TL)){
1805         first=node->tl;
1806         second=node->br;
1807     }else if(primn==PRIMN_BR ||
1808        (primn==PRIMN_ANY && node->current==SPLIT_CURRENT_BR)){
1809         first=node->br;
1810         second=node->tl;
1811     }else{
1812         return NULL;
1813     }
1814
1815     ret=split_current_todir(first, hprimn, vprimn, filter);
1816     if(ret==NULL)
1817         ret=split_current_todir(second, hprimn, vprimn, filter);
1818     if(ret==NULL && filter!=NULL){
1819         if(filter((WSplit*)node))
1820             ret=(WSplit*)node;
1821     }
1822
1823     return ret;
1824 }
1825
1826
1827 WSplit *split_current_todir(WSplit *node, WPrimn hprimn, WPrimn vprimn,
1828                             WSplitFilter *filter)
1829 {
1830     WSplit *ret=NULL;
1831     CALL_DYN_RET(ret, WSplit*, split_current_todir, node,
1832                  (node, hprimn, vprimn, filter));
1833     return ret;
1834 }
1835
1836
1837 /* Note: both hprimn and vprimn are inverted when descending.  Therefore
1838  * one should be either PRIMN_NONE or PRIMN_ANY for sensible geometric
1839  * navigation. (Both are PRIMN_TL or PRIMN_BR for pseudo-linear
1840  * next/previous navigation.)
1841  */
1842 WSplit *splitsplit_nextto(WSplitSplit *node, WSplit *child,
1843                           WPrimn hprimn, WPrimn vprimn,
1844                           WSplitFilter *filter)
1845 {
1846     WPrimn primn=(node->dir==SPLIT_HORIZONTAL ? hprimn : vprimn);
1847     WSplit *split=NULL, *nnode=NULL;
1848
1849     if(node->tl==child && (primn==PRIMN_BR || primn==PRIMN_ANY))
1850         split=node->br;
1851     else if(node->br==child && (primn==PRIMN_TL || primn==PRIMN_ANY))
1852         split=node->tl;
1853
1854     if(split!=NULL){
1855         nnode=split_current_todir(split,
1856                                   primn_none2any(primn_invert(hprimn)),
1857                                   primn_none2any(primn_invert(vprimn)),
1858                                   filter);
1859     }
1860
1861     if(nnode==NULL)
1862         nnode=split_nextto((WSplit*)node, hprimn, vprimn, filter);
1863
1864     return nnode;
1865 }
1866
1867
1868 WSplit *splitinner_nextto(WSplitInner *node, WSplit *child,
1869                           WPrimn hprimn, WPrimn vprimn,
1870                           WSplitFilter *filter)
1871 {
1872     WSplit *ret=NULL;
1873     CALL_DYN_RET(ret, WSplit*, splitinner_nextto, node,
1874                  (node, child, hprimn, vprimn, filter));
1875     return ret;
1876 }
1877
1878
1879 WSplit *split_nextto(WSplit *node, WPrimn hprimn, WPrimn vprimn,
1880                      WSplitFilter *filter)
1881 {
1882     while(node->parent!=NULL){
1883         WSplit *ret=splitinner_nextto(node->parent, node,
1884                                       hprimn, vprimn, filter);
1885         if(ret!=NULL)
1886             return ret;
1887         node=(WSplit*)node->parent;
1888     }
1889     return NULL;
1890 }
1891
1892
1893 void splitinner_mark_current_default(WSplitInner *split, WSplit *child)
1894 {
1895     if(((WSplit*)split)->parent!=NULL)
1896         splitinner_mark_current(((WSplit*)split)->parent, (WSplit*)split);
1897 }
1898
1899
1900 void splitsplit_mark_current(WSplitSplit *split, WSplit *child)
1901 {
1902     assert(child==split->tl || child==split->br);
1903
1904     split->current=(split->tl==child ? SPLIT_CURRENT_TL : SPLIT_CURRENT_BR);
1905
1906     splitinner_mark_current_default(&(split->isplit), child);
1907 }
1908
1909
1910 void splitinner_mark_current(WSplitInner *split, WSplit *child)
1911 {
1912     CALL_DYN(splitinner_mark_current, split, (split, child));
1913 }
1914
1915
1916 static void splitsplit_forall(WSplitSplit *node, WSplitFn *fn)
1917 {
1918     fn(node->tl);
1919     fn(node->br);
1920 }
1921
1922
1923 void splitinner_forall(WSplitInner *node, WSplitFn *fn)
1924 {
1925     CALL_DYN(splitinner_forall, node, (node, fn));
1926 }
1927
1928
1929 static WSplit *splitsplit_current(WSplitSplit *split)
1930 {
1931     return (split->current==SPLIT_CURRENT_TL ? split->tl : split->br);
1932 }
1933
1934
1935 /*EXTL_DOC
1936  * Returns the most previously active child node of \var{split}.
1937  */
1938 EXTL_SAFE
1939 EXTL_EXPORT_MEMBER
1940 WSplit *splitinner_current(WSplitInner *node)
1941 {
1942     WSplit *ret=NULL;
1943     CALL_DYN_RET(ret, WSplit*, splitinner_current, node, (node));
1944     return ret;
1945 }
1946
1947
1948 /*}}}*/
1949
1950
1951 /*{{{ X window handling */
1952
1953
1954 static void splitregion_stacking(WSplitRegion *split,
1955                                  Window *bottomret, Window *topret)
1956 {
1957     *bottomret=None;
1958     *topret=None;
1959     if(split->reg!=NULL)
1960         region_stacking(split->reg, bottomret, topret);
1961 }
1962
1963
1964 void splitsplit_stacking(WSplitSplit *split,
1965                          Window *bottomret, Window *topret)
1966 {
1967     Window tlb=None, tlt=None;
1968     Window brb=None, brt=None;
1969
1970     split_stacking(split->tl, &tlb, &tlt);
1971     split_stacking(split->br, &brb, &brt);
1972
1973     /* To make sure that this condition holds is left to the workspace
1974      * code to do after a split tree has been loaded or modified.
1975      */
1976     if(split->current==SPLIT_CURRENT_TL){
1977         *topret=(tlt!=None ? tlt : brt);
1978         *bottomret=(brb!=None ? brb : tlb);
1979     }else{
1980         *topret=(brt!=None ? brt : tlt);
1981         *bottomret=(tlb!=None ? tlb : brb);
1982     }
1983 }
1984
1985 void split_stacking(WSplit *split, Window *bottomret, Window *topret)
1986 {
1987     *bottomret=None;
1988     *topret=None;
1989     {
1990         CALL_DYN(split_stacking, split, (split, bottomret, topret));
1991     }
1992 }
1993
1994
1995 static void splitregion_restack(WSplitRegion *split, Window other, int mode)
1996 {
1997     if(split->reg!=NULL)
1998         region_restack(split->reg, other, mode);
1999 }
2000
2001 void splitsplit_restack(WSplitSplit *split, Window other, int mode)
2002 {
2003     Window bottom=None, top=None;
2004     WSplit *first, *second;
2005
2006     if(split->current==SPLIT_CURRENT_TL){
2007         first=split->br;
2008         second=split->tl;
2009     }else{
2010         first=split->tl;
2011         second=split->br;
2012     }
2013
2014     split_restack(first, other, mode);
2015     split_stacking(first, &bottom, &top);
2016     if(top!=None){
2017         other=top;
2018         mode=Above;
2019     }
2020     split_restack(second, other, mode);
2021 }
2022
2023 void split_restack(WSplit *split, Window other, int mode)
2024 {
2025     CALL_DYN(split_restack, split, (split, other, mode));
2026 }
2027
2028
2029 static void splitregion_map(WSplitRegion *split)
2030 {
2031     if(split->reg!=NULL)
2032         region_map(split->reg);
2033 }
2034
2035 static void splitinner_map(WSplitInner *split)
2036 {
2037     splitinner_forall(split, split_map);
2038 }
2039
2040 void split_map(WSplit *split)
2041 {
2042     CALL_DYN(split_map, split, (split));
2043 }
2044
2045
2046 static void splitregion_unmap(WSplitRegion *split)
2047 {
2048     if(split->reg!=NULL)
2049         region_unmap(split->reg);
2050 }
2051
2052 static void splitinner_unmap(WSplitInner *split)
2053 {
2054     splitinner_forall(split, split_unmap);
2055 }
2056
2057 void split_unmap(WSplit *split)
2058 {
2059     CALL_DYN(split_unmap, split, (split));
2060 }
2061
2062
2063 static void splitregion_reparent(WSplitRegion *split, WWindow *wwin)
2064 {
2065     if(split->reg!=NULL){
2066         WRectangle g=split->split.geom;
2067         region_reparent(split->reg, wwin, &g, REGION_FIT_EXACT);
2068     }
2069 }
2070
2071
2072 static void splitsplit_reparent(WSplitSplit *split, WWindow *wwin)
2073 {
2074     if(split->current==SPLIT_CURRENT_TL){
2075         split_reparent(split->br, wwin);
2076         split_reparent(split->tl, wwin);
2077     }else{
2078         split_reparent(split->tl, wwin);
2079         split_reparent(split->br, wwin);
2080     }
2081 }
2082
2083
2084 void split_reparent(WSplit *split, WWindow *wwin)
2085 {
2086     CALL_DYN(split_reparent, split, (split, wwin));
2087 }
2088
2089
2090 /*}}}*/
2091
2092
2093 /*{{{ Transpose, flip, rotate */
2094
2095
2096 void splitsplit_flip_default(WSplitSplit *split)
2097 {
2098     WRectangle tlng, brng;
2099     WRectangle *sg=&((WSplit*)split)->geom;
2100     WSplit *tmp;
2101
2102     assert(split->tl!=NULL && split->br!=NULL);
2103
2104     split_update_bounds((WSplit*)split, TRUE);
2105
2106     tlng=split->tl->geom;
2107     brng=split->br->geom;
2108
2109     if(split->dir==SPLIT_HORIZONTAL){
2110         brng.x=sg->x;
2111         tlng.x=sg->x+sg->w-tlng.w;
2112     }else{
2113         brng.y=sg->y;
2114         tlng.y=sg->y+sg->h-tlng.h;
2115     }
2116
2117     tmp=split->tl;
2118     split->tl=split->br;
2119     split->br=tmp;
2120     split->current=(split->current==SPLIT_CURRENT_TL
2121                     ? SPLIT_CURRENT_BR
2122                     : SPLIT_CURRENT_TL);
2123
2124     split_do_resize(split->tl, &brng, PRIMN_ANY, PRIMN_ANY, FALSE);
2125     split_do_resize(split->br, &tlng, PRIMN_ANY, PRIMN_ANY, FALSE);
2126 }
2127
2128
2129 static void splitsplit_flip_(WSplitSplit *split)
2130 {
2131     CALL_DYN(splitsplit_flip, split, (split));
2132 }
2133
2134
2135 /*EXTL_DOC
2136  * Flip contents of \var{split}.
2137  */
2138 EXTL_EXPORT_MEMBER
2139 void splitsplit_flip(WSplitSplit *split)
2140 {
2141     splittree_begin_resize();
2142
2143     split=OBJ_CAST(dodge_stdisp((WSplit*)split, FALSE), WSplitSplit);
2144
2145     if(split==NULL)
2146         return;
2147
2148     splitsplit_flip_(split);
2149
2150     splittree_end_resize();
2151 }
2152
2153 typedef enum{
2154     FLIP_VERTICAL,
2155     FLIP_HORIZONTAL,
2156     FLIP_NONE,
2157     FLIP_ANY
2158 } FlipDir;
2159
2160
2161 static FlipDir flipdir=FLIP_VERTICAL;
2162
2163
2164 static void do_flip(WSplit *split)
2165 {
2166     WSplitSplit *ss=OBJ_CAST(split, WSplitSplit);
2167
2168     if(ss!=NULL){
2169         if((flipdir==FLIP_ANY
2170             || (ss->dir==SPLIT_VERTICAL && flipdir==FLIP_VERTICAL)
2171             || (ss->dir==SPLIT_HORIZONTAL && flipdir==FLIP_HORIZONTAL))
2172            && !OBJ_IS(ss->tl, WSplitST)
2173            && !OBJ_IS(ss->br, WSplitST)){
2174             splitsplit_flip_(ss);
2175         }
2176     }
2177
2178     if(OBJ_IS(ss, WSplitInner))
2179         splitinner_forall((WSplitInner*)ss, do_flip);
2180 }
2181
2182
2183 static void splittree_flip_dir(WSplit *splittree, FlipDir dir)
2184 {
2185     /* todo stdisp outta way */
2186     if(OBJ_IS(splittree, WSplitInner)){
2187         flipdir=dir;
2188         splitinner_forall((WSplitInner*)splittree, do_flip);
2189     }
2190 }
2191
2192
2193 static bool split_fliptrans_to(WSplit *node, const WRectangle *geom,
2194                               bool trans, FlipDir flip)
2195 {
2196     WRectangle rg;
2197     WSplit *node2;
2198
2199     splittree_begin_resize();
2200
2201     /* split_do_resize can do things right if 'node' has stdisp as child,
2202      * but otherwise transpose will put the stdisp in a bad split
2203      * configuration if it is contained within 'node', so we must
2204      * first move it and its fixed parent split below node. For correct
2205      * geometry calculation we move it immediately below node, and
2206      * resize stdisp's fixed parent node instead.
2207      */
2208     node2=dodge_stdisp(node, TRUE);
2209
2210     if(node==NULL || node2!=node)
2211         return FALSE;
2212
2213     split_update_bounds(node, TRUE);
2214
2215     split_do_rqgeom_(node, geom, PRIMN_ANY, PRIMN_ANY, &rg, FALSE);
2216
2217     split_do_resize(node, &rg, PRIMN_ANY, PRIMN_ANY, trans);
2218
2219     if(flip!=FLIP_NONE)
2220         splittree_flip_dir(node, flip);
2221
2222     splittree_end_resize();
2223
2224     return TRUE;
2225 }
2226
2227
2228 bool split_transpose_to(WSplit *node, const WRectangle *geom)
2229 {
2230     return split_fliptrans_to(node, geom, TRUE, FLIP_ANY);
2231 }
2232
2233
2234 /*EXTL_DOC
2235  * Transpose contents of \var{node}.
2236  */
2237 EXTL_EXPORT_MEMBER
2238 void split_transpose(WSplit *node)
2239 {
2240     WRectangle g=node->geom;
2241
2242     split_transpose_to(node, &g);
2243 }
2244
2245
2246 bool split_rotate_to(WSplit *node, const WRectangle *geom, int rotation)
2247 {
2248     FlipDir flip=FLIP_NONE;
2249     bool trans=FALSE;
2250
2251     if(rotation==SCREEN_ROTATION_90){
2252         flip=FLIP_HORIZONTAL;
2253         trans=TRUE;
2254     }else if(rotation==SCREEN_ROTATION_180){
2255         flip=FLIP_ANY;
2256     }else if(rotation==SCREEN_ROTATION_270){
2257         flip=FLIP_VERTICAL;
2258         trans=TRUE;
2259     }
2260
2261     return split_fliptrans_to(node, geom, trans, flip);
2262 }
2263
2264 /*}}}*/
2265
2266
2267 /*{{{ Exports */
2268
2269
2270 /*EXTL_DOC
2271  * Return parent split for \var{split}.
2272  */
2273 EXTL_SAFE
2274 EXTL_EXPORT_MEMBER
2275 WSplitInner *split_parent(WSplit *split)
2276 {
2277     return split->parent;
2278 }
2279
2280
2281 /*EXTL_DOC
2282  * Returns the area of workspace used by the regions under \var{split}.
2283  */
2284 EXTL_SAFE
2285 EXTL_EXPORT_MEMBER
2286 ExtlTab split_geom(WSplit *split)
2287 {
2288     return extl_table_from_rectangle(&(split->geom));
2289 }
2290
2291
2292 /*EXTL_DOC
2293  * Returns the top or left child node of \var{split} depending
2294  * on the direction of the split.
2295  */
2296 EXTL_SAFE
2297 EXTL_EXPORT_MEMBER
2298 WSplit *splitsplit_tl(WSplitSplit *split)
2299 {
2300     return split->tl;
2301 }
2302
2303
2304 /*EXTL_DOC
2305  * Returns the bottom or right child node of \var{split} depending
2306  * on the direction of the split.
2307  */
2308 EXTL_SAFE
2309 EXTL_EXPORT_MEMBER
2310 WSplit *splitsplit_br(WSplitSplit *split)
2311 {
2312     return split->br;
2313 }
2314
2315 /*EXTL_DOC
2316  * Returns the direction of \var{split}; either \codestr{vertical} or
2317  * \codestr{horizontal}.
2318  */
2319 EXTL_SAFE
2320 EXTL_EXPORT_MEMBER
2321 const char *splitsplit_dir(WSplitSplit *split)
2322 {
2323     return (split->dir==SPLIT_VERTICAL ? "vertical" : "horizontal");
2324 }
2325
2326
2327 /*EXTL_DOC
2328  * Returns the region contained in \var{node}.
2329  */
2330 EXTL_SAFE
2331 EXTL_EXPORT_MEMBER
2332 WRegion *splitregion_reg(WSplitRegion *node)
2333 {
2334     return node->reg;
2335 }
2336
2337
2338 /*}}}*/
2339
2340
2341 /*{{{ Save support */
2342
2343
2344 ExtlTab split_base_config(WSplit *node)
2345 {
2346     ExtlTab t=extl_create_table();
2347     extl_table_sets_s(t, "type", OBJ_TYPESTR(node));
2348     return t;
2349 }
2350
2351
2352 static bool splitregion_get_config(WSplitRegion *node, ExtlTab *ret)
2353 {
2354     ExtlTab rt, t;
2355
2356     if(node->reg==NULL)
2357         return FALSE;
2358
2359     if(!region_supports_save(node->reg)){
2360         warn(TR("Unable to get configuration for %s."),
2361              region_name(node->reg));
2362         return FALSE;
2363     }
2364
2365     rt=region_get_configuration(node->reg);
2366     t=split_base_config(&(node->split));
2367     extl_table_sets_t(t, "regparams", rt);
2368     extl_unref_table(rt);
2369     *ret=t;
2370
2371     return TRUE;
2372 }
2373
2374
2375 static bool splitst_get_config(WSplitST *node, ExtlTab *ret)
2376 {
2377     *ret=split_base_config((WSplit*)node);
2378     return TRUE;
2379 }
2380
2381
2382 static bool splitsplit_get_config(WSplitSplit *node, ExtlTab *ret)
2383 {
2384     ExtlTab tab, tltab, brtab;
2385     int tls, brs;
2386
2387     if(!split_get_config(node->tl, &tltab))
2388         return split_get_config(node->br, ret);
2389
2390     if(!split_get_config(node->br, &brtab)){
2391         *ret=tltab;
2392         return TRUE;
2393     }
2394
2395     tab=split_base_config((WSplit*)node);
2396
2397     tls=split_size(node->tl, node->dir);
2398     brs=split_size(node->br, node->dir);
2399
2400     extl_table_sets_s(tab, "dir", (node->dir==SPLIT_VERTICAL
2401                                    ? "vertical" : "horizontal"));
2402
2403     extl_table_sets_i(tab, "tls", tls);
2404     extl_table_sets_t(tab, "tl", tltab);
2405     extl_unref_table(tltab);
2406
2407     extl_table_sets_i(tab, "brs", brs);
2408     extl_table_sets_t(tab, "br", brtab);
2409     extl_unref_table(brtab);
2410
2411     *ret=tab;
2412
2413     return TRUE;
2414 }
2415
2416
2417 bool split_get_config(WSplit *node, ExtlTab *tabret)
2418 {
2419     bool ret=FALSE;
2420     CALL_DYN_RET(ret, bool, split_get_config, node, (node, tabret));
2421     return ret;
2422 }
2423
2424
2425 /*}}}*/
2426
2427
2428 /*{{{ The classes */
2429
2430
2431 static DynFunTab split_dynfuntab[]={
2432     {split_do_resize, split_do_resize_default},
2433     {(DynFun*)split_current_todir, (DynFun*)split_current_todir_default},
2434     END_DYNFUNTAB,
2435 };
2436
2437 static DynFunTab splitinner_dynfuntab[]={
2438     {splitinner_mark_current, splitinner_mark_current_default},
2439     {split_map, splitinner_map},
2440     {split_unmap, splitinner_unmap},
2441     END_DYNFUNTAB,
2442 };
2443
2444 static DynFunTab splitsplit_dynfuntab[]={
2445     {split_update_bounds, splitsplit_update_bounds},
2446     {split_do_resize, splitsplit_do_resize},
2447     {split_do_maxhelper, splitsplit_do_maxhelper},
2448     {(DynFun*)split_do_restore, (DynFun*)splitsplit_do_restore},
2449     {(DynFun*)split_do_verify, (DynFun*)splitsplit_do_verify},
2450     {splitinner_do_rqsize, splitsplit_do_rqsize},
2451     {splitinner_replace, splitsplit_replace},
2452     {splitinner_remove, splitsplit_remove},
2453     {(DynFun*)split_current_todir, (DynFun*)splitsplit_current_todir},
2454     {(DynFun*)splitinner_current, (DynFun*)splitsplit_current},
2455     {(DynFun*)splitinner_nextto, (DynFun*)splitsplit_nextto},
2456     {splitinner_mark_current, splitsplit_mark_current},
2457     {(DynFun*)split_get_config, (DynFun*)splitsplit_get_config},
2458     {splitinner_forall, splitsplit_forall},
2459     {split_restack, splitsplit_restack},
2460     {split_stacking, splitsplit_stacking},
2461     {split_reparent, splitsplit_reparent},
2462     {splitsplit_flip, splitsplit_flip_default},
2463     END_DYNFUNTAB,
2464 };
2465
2466 static DynFunTab splitregion_dynfuntab[]={
2467     {split_update_bounds, splitregion_update_bounds},
2468     {split_do_resize, splitregion_do_resize},
2469     {split_do_maxhelper, splitregion_do_maxhelper},
2470     {(DynFun*)split_do_restore, (DynFun*)splitregion_do_restore},
2471     {(DynFun*)split_do_verify, (DynFun*)splitregion_do_verify},
2472     {(DynFun*)split_get_config, (DynFun*)splitregion_get_config},
2473     {split_map, splitregion_map},
2474     {split_unmap, splitregion_unmap},
2475     {split_restack, splitregion_restack},
2476     {split_stacking, splitregion_stacking},
2477     {split_reparent, splitregion_reparent},
2478     END_DYNFUNTAB,
2479 };
2480
2481 static DynFunTab splitst_dynfuntab[]={
2482     {split_update_bounds, splitst_update_bounds},
2483     {split_do_resize, splitst_do_resize},
2484     {split_do_maxhelper, splitst_do_maxhelper},
2485     {(DynFun*)split_do_restore, (DynFun*)splitst_do_restore},
2486     {(DynFun*)split_do_verify, (DynFun*)splitst_do_verify},
2487     {(DynFun*)split_get_config, (DynFun*)splitst_get_config},
2488     END_DYNFUNTAB,
2489 };
2490
2491
2492 EXTL_EXPORT
2493 IMPLCLASS(WSplit, Obj, split_deinit, split_dynfuntab);
2494
2495 EXTL_EXPORT
2496 IMPLCLASS(WSplitInner, WSplit, splitinner_deinit, splitinner_dynfuntab);
2497
2498 EXTL_EXPORT
2499 IMPLCLASS(WSplitSplit, WSplitInner, splitsplit_deinit, splitsplit_dynfuntab);
2500
2501 EXTL_EXPORT
2502 IMPLCLASS(WSplitRegion, WSplit, splitregion_deinit, splitregion_dynfuntab);
2503
2504 EXTL_EXPORT
2505 IMPLCLASS(WSplitST, WSplitRegion, splitst_deinit, splitst_dynfuntab);
2506
2507
2508 /*}}}*/
2509