ioncore/mplexpholder.c

   1 /*
   2  * ion/ioncore/mplexpholder.c
   3  *
   4  * Copyright (c) Tuomo Valkonen 2005-2009.
   5  *
   6  * See the included file LICENSE for details.
   7  */
   8
   9 #include <libtu/objp.h>
  10 #include <libtu/obj.h>
  11 #include <libtu/pointer.h>
  12 #include <libmainloop/defer.h>
  13
  14 #include "common.h"
  15 #include "mplex.h"
  16 #include "mplexpholder.h"
  17 #include "llist.h"
  18 #include "framedpholder.h"
  19 #include "basicpholder.h"
  20
  21
  22 /*{{{ Primitives */
  23
  24
  25 static bool on_ph_list(WMPlexPHolder *ll, WMPlexPHolder *ph)
  26 {
  27     return ph->prev!=NULL;
  28 }
  29
  30
  31 static void mplexpholder_do_link(WMPlexPHolder *ph,
  32                                  WMPlex *mplex,
  33                                  WMPlexPHolder *after,
  34                                  WLListNode *or_after)
  35 {
  36     assert(mplex==(WMPlex*)ph->mplex && mplex!=NULL);
  37
  38     if(after!=NULL){
  39         assert(after->after==or_after);
  40
  41         if(after->after!=NULL){
  42             LINK_ITEM_AFTER(after->after->phs, after, ph, next, prev);
  43         }else{
  44             assert(on_ph_list(mplex->misc_phs, after));
  45             LINK_ITEM_AFTER(mplex->misc_phs, after, ph, next, prev);
  46         }
  47         ph->after=after->after;
  48     }else if(or_after!=NULL){
  49         LINK_ITEM_FIRST(or_after->phs, ph, next, prev);
  50         ph->after=or_after;
  51     }else{
  52         LINK_ITEM_FIRST(mplex->misc_phs, ph, next, prev);
  53         ph->after=NULL;
  54     }
  55 }
  56
  57
  58 static WMPlexPHolder *get_head(WMPlexPHolder *ph)
  59 {
  60     while(1){
  61         /* ph->prev==NULL should not happen.. */
  62         if(ph->prev==NULL || ph->prev->next==NULL)
  63             break;
  64         ph=ph->prev;
  65     }
  66
  67     return ph;
  68 }
  69
  70
  71 void mplexpholder_do_unlink(WMPlexPHolder *ph, WMPlex *mplex)
  72 {
  73     if(ph->recreate_pholder!=NULL){
  74         if(ph->next!=NULL){
  75             ph->next->recreate_pholder=ph->recreate_pholder;
  76         }else{
  77             /* It might be in use in attach chain! So defer. */
  78             mainloop_defer_destroy((Obj*)ph->recreate_pholder);
  79         }
  80         ph->recreate_pholder=NULL;
  81     }
  82
  83     if(ph->after!=NULL){
  84         UNLINK_ITEM(ph->after->phs, ph, next, prev);
  85     }else if(mplex!=NULL && on_ph_list(mplex->misc_phs, ph)){
  86         UNLINK_ITEM(mplex->misc_phs, ph, next, prev);
  87     }else if(ph->prev!=NULL){
  88         WMPlexPHolder *next=ph->next;
  89
  90         ph->prev->next=next;
  91
  92         if(next==NULL){
  93             next=get_head(ph);
  94             assert(next->prev==ph);
  95         }
  96         next->prev=ph->prev;
  97     }else{
  98         /* ph should not be on a list, if prev pointer is NULL (whereas
  99          * next alone can be NULL in our semi-doubly-linked lists).
 100          */
 101         assert(ph->next==NULL);
 102     }
 103
 104     ph->after=NULL;
 105     ph->next=NULL;
 106     ph->prev=NULL;
 107 }
 108
 109
 110 /*}}}*/
 111
 112
 113 /*{{{ Init/deinit */
 114
 115
 116 static void mplex_get_attach_params(WMPlex *mplex, WStacking *st,
 117                                     WMPlexAttachParams *param)
 118 {
 119     param->flags=(MPLEX_ATTACH_SIZEPOLICY|
 120                   MPLEX_ATTACH_GEOM|
 121                   MPLEX_ATTACH_LEVEL|
 122                   (st->hidden ? MPLEX_ATTACH_HIDDEN : 0)|
 123                   (st->lnode==NULL ? MPLEX_ATTACH_UNNUMBERED : 0));
 124     param->szplcy=st->szplcy;
 125     param->geom=REGION_GEOM(st->reg);
 126     param->level=st->level;
 127 }
 128
 129
 130 bool mplexpholder_init(WMPlexPHolder *ph, WMPlex *mplex, WStacking *st,
 131                        WMPlexAttachParams *param)
 132 {
 133     WLListNode *or_after=NULL;
 134     WMPlexPHolder *after=NULL;
 135
 136     pholder_init(&(ph->ph));
 137
 138     ph->mplex=mplex;
 139     ph->after=NULL;
 140     ph->next=NULL;
 141     ph->prev=NULL;
 142     ph->param.flags=0;
 143     ph->recreate_pholder=NULL;
 144
 145     if(st!=NULL){
 146         mplex_get_attach_params(mplex, st, &ph->param);
 147
 148         if(st->lnode!=NULL){
 149             after=LIST_LAST(st->lnode->phs, next, prev);
 150             or_after=st->lnode;
 151         }
 152     }else{
 153         static WMPlexAttachParams dummy_param={0, 0, {0, 0, 0, 0}, 0, 0};
 154
 155         if(param==NULL)
 156             param=&dummy_param;
 157
 158         ph->param=*param;
 159
 160         if(!(param->flags&MPLEX_ATTACH_UNNUMBERED)){
 161             int index=(param->flags&MPLEX_ATTACH_INDEX
 162                        ? param->index
 163                        : mplex_default_index(mplex));
 164             or_after=llist_index_to_after(mplex->mx_list,
 165                                           mplex->mx_current, index);
 166             after=(index==LLIST_INDEX_LAST
 167                    ? (or_after!=NULL
 168                       ? LIST_LAST(or_after->phs, next, prev)
 169                       : LIST_LAST(mplex->misc_phs, next, prev))
 170                    : NULL);
 171         }
 172     }
 173
 174     mplexpholder_do_link(ph, mplex, after, or_after);
 175
 176     return TRUE;
 177 }
 178
 179
 180 WMPlexPHolder *create_mplexpholder(WMPlex *mplex,
 181                                    WStacking *st,
 182                                    WMPlexAttachParams *param)
 183 {
 184     CREATEOBJ_IMPL(WMPlexPHolder, mplexpholder, (p, mplex, st, param));
 185 }
 186
 187
 188 void mplexpholder_deinit(WMPlexPHolder *ph)
 189 {
 190     mplexpholder_do_unlink(ph, ph->mplex);
 191     pholder_deinit(&(ph->ph));
 192 }
 193
 194
 195 /*}}}*/
 196
 197
 198 /*{{{ Move, attach */
 199
 200
 201 typedef struct{
 202     WMPlexPHolder *ph, *ph_head;
 203     WRegionAttachData *data;
 204     WFramedParam *param;
 205     WRegion *reg_ret;
 206 } RP;
 207
 208
 209 static WRegion *recreate_handler(WWindow *par,
 210                                  const WFitParams *fp,
 211                                  void *rp_)
 212 {
 213     RP *rp=(RP*)rp_;
 214     WMPlexPHolder *ph=rp->ph, *ph_head=rp->ph_head, *phtmp;
 215     WFramedParam *param=rp->param;
 216     WFrame *frame;
 217
 218     frame=create_frame(par, fp, param->mode);
 219
 220     if(frame==NULL)
 221         return NULL;
 222
 223     /* Move pholders to frame */
 224     frame->mplex.misc_phs=ph_head;
 225
 226     for(phtmp=frame->mplex.misc_phs; phtmp!=NULL; phtmp=phtmp->next)
 227         phtmp->mplex=&frame->mplex;
 228
 229     /* Attach */
 230     if(fp->mode&(REGION_FIT_BOUNDS|REGION_FIT_WHATEVER))
 231         ph->param.flags|=MPLEX_ATTACH_WHATEVER;
 232
 233     rp->reg_ret=mplex_do_attach_pholder(&frame->mplex, ph, rp->data);
 234
 235     ph->param.flags&=~MPLEX_ATTACH_WHATEVER;
 236
 237     if(rp->reg_ret==NULL){
 238         /* Try to recover */
 239         for(phtmp=frame->mplex.misc_phs; phtmp!=NULL; phtmp=phtmp->next)
 240             phtmp->mplex=NULL;
 241
 242         frame->mplex.misc_phs=NULL;
 243
 244         destroy_obj((Obj*)frame);
 245
 246         return NULL;
 247     }else{
 248         frame_adjust_to_initial(frame, fp, param, rp->reg_ret);
 249
 250         return (WRegion*)frame;
 251     }
 252 }
 253
 254
 255 static WFramedPHolder *get_recreate_ph(WMPlexPHolder *ph)
 256 {
 257     return get_head(ph)->recreate_pholder;
 258 }
 259
 260
 261 static WRegion *mplexpholder_attach_recreate(WMPlexPHolder *ph, int flags,
 262                                              WRegionAttachData *data)
 263 {
 264     WRegionAttachData data2;
 265     WFramedPHolder *fph;
 266     WPHolder *root;
 267     WRegion *res;
 268     RP rp;
 269
 270     rp.ph_head=get_head(ph);
 271
 272     assert(rp.ph_head!=NULL);
 273
 274     fph=rp.ph_head->recreate_pholder;
 275
 276     if(fph==NULL)
 277         return NULL;
 278
 279     rp.ph=ph;
 280     rp.data=data;
 281     rp.param=&fph->param;
 282     rp.reg_ret=NULL;
 283
 284     data2.type=REGION_ATTACH_NEW;
 285     data2.u.n.fn=recreate_handler;
 286     data2.u.n.param=&rp;
 287
 288     res=pholder_do_attach(fph->cont, flags, &data2);
 289
 290     if(res!=NULL){
 291         rp.ph_head->recreate_pholder=NULL;
 292         /* It might be in use in attach chain! So defer. */
 293         mainloop_defer_destroy((Obj*)fph);
 294     }
 295
 296     return (flags&PHOLDER_ATTACH_RETURN_CREATEROOT
 297             ? (WRegion*)res
 298             : rp.reg_ret);
 299 }
 300
 301
 302 WRegion *mplexpholder_do_attach(WMPlexPHolder *ph, int flags,
 303                                 WRegionAttachData *data)
 304 {
 305     WMPlex *mplex=ph->mplex;
 306
 307     if(mplex==NULL)
 308         return mplexpholder_attach_recreate(ph, flags, data);
 309
 310     if(flags&PHOLDER_ATTACH_SWITCHTO)
 311         ph->param.flags|=MPLEX_ATTACH_SWITCHTO;
 312     else
 313         ph->param.flags&=~MPLEX_ATTACH_SWITCHTO;
 314
 315     return mplex_do_attach_pholder(mplex, ph, data);
 316 }
 317
 318
 319 bool mplexpholder_move(WMPlexPHolder *ph, WMPlex *mplex,
 320                        WMPlexPHolder *after,
 321                        WLListNode *or_after)
 322 {
 323     mplexpholder_do_unlink(ph, ph->mplex);
 324
 325     ph->mplex=mplex;
 326
 327     if(mplex==NULL)
 328         return TRUE;
 329
 330     mplexpholder_do_link(ph, mplex, after, or_after);
 331
 332     return TRUE;
 333 }
 334
 335
 336 bool mplexpholder_do_goto(WMPlexPHolder *ph)
 337 {
 338     WRegion *reg=(WRegion*)ph->mplex;
 339
 340     if(reg!=NULL){
 341         return region_goto(reg);
 342     }else{
 343         WFramedPHolder *fph=get_recreate_ph(ph);
 344
 345         return (fph!=NULL
 346                 ? pholder_do_goto((WPHolder*)fph)
 347                 : FALSE);
 348     }
 349 }
 350
 351
 352 WRegion *mplexpholder_do_target(WMPlexPHolder *ph)
 353 {
 354     WRegion *reg=(WRegion*)ph->mplex;
 355
 356     if(reg!=NULL){
 357         return reg;
 358     }else{
 359         WFramedPHolder *fph=get_recreate_ph(ph);
 360
 361         return (fph!=NULL
 362                 ? pholder_do_target((WPHolder*)fph)
 363                 : NULL);
 364     }
 365 }
 366
 367
 368 bool mplexpholder_stale(WMPlexPHolder *ph)
 369 {
 370     WRegion *reg=(WRegion*)ph->mplex;
 371
 372     if(reg!=NULL){
 373         return FALSE;
 374     }else{
 375         WFramedPHolder *fph=get_recreate_ph(ph);
 376
 377         return (fph==NULL || pholder_stale((WPHolder*)fph));
 378     }
 379 }
 380
 381
 382 /*}}}*/
 383
 384
 385 /*{{{ WMPlex routines */
 386
 387
 388 void mplex_move_phs(WMPlex *mplex, WLListNode *node,
 389                     WMPlexPHolder *after,
 390                     WLListNode *or_after)
 391 {
 392     WMPlexPHolder *ph;
 393
 394     assert(node!=or_after);
 395
 396     while(node->phs!=NULL){
 397         ph=node->phs;
 398
 399         mplexpholder_do_unlink(ph, mplex);
 400         mplexpholder_do_link(ph, mplex, after, or_after);
 401
 402         after=ph;
 403     }
 404 }
 405
 406 void mplex_move_phs_before(WMPlex *mplex, WLListNode *node)
 407 {
 408     WMPlexPHolder *after=NULL;
 409     WLListNode *or_after;
 410
 411     or_after=LIST_PREV(mplex->mx_list, node, next, prev);
 412
 413     after=(or_after!=NULL
 414            ? LIST_LAST(or_after->phs, next, prev)
 415            : LIST_LAST(mplex->misc_phs, next, prev));
 416
 417     mplex_move_phs(mplex, node, after, or_after);
 418 }
 419
 420
 421 WMPlexPHolder *mplex_managed_get_pholder(WMPlex *mplex, WRegion *mgd)
 422 {
 423     WStacking *st=mplex_find_stacking(mplex, mgd);
 424
 425     if(st==NULL)
 426         return NULL;
 427     else
 428         return create_mplexpholder(mplex, st, NULL);
 429 }
 430
 431
 432 void mplex_flatten_phs(WMPlex *mplex)
 433 {
 434     WLListNode *node;
 435     WLListIterTmp tmp;
 436
 437     FOR_ALL_NODES_ON_LLIST(node, mplex->mx_list, tmp){
 438         WMPlexPHolder *last=(mplex->misc_phs==NULL ? NULL : mplex->misc_phs->prev);
 439         mplex_move_phs(mplex, node, last, NULL);
 440     }
 441 }
 442
 443
 444 void mplex_migrate_phs(WMPlex *src, WMPlex *dst)
 445 {
 446     WLListNode *or_after=LIST_LAST(dst->mx_list, next, prev);
 447     WMPlexPHolder *after=(or_after!=NULL
 448                           ? LIST_LAST(or_after->phs, next, prev)
 449                           : LIST_LAST(dst->misc_phs, next, prev));
 450
 451     while(src->misc_phs!=NULL){
 452         WMPlexPHolder *ph=src->misc_phs;
 453         mplexpholder_move(ph, dst, after, or_after);
 454         after=ph;
 455     }
 456 }
 457
 458
 459 /*}}}*/
 460
 461
 462 /*{{ Rescue */
 463
 464
 465 WRegion *mplex_rescue_attach(WMPlex *mplex, int flags, WRegionAttachData *data)
 466 {
 467     WMPlexAttachParams param;
 468
 469     param.flags=0;
 470
 471     /* Improved attach parametrisation hack for WMPlex source */
 472     if(data->type==REGION_ATTACH_REPARENT){
 473         WRegion *reg=data->u.reg;
 474         WMPlex *src_mplex=REGION_MANAGER_CHK(reg, WMPlex);
 475         if(src_mplex!=NULL){
 476             WStacking *st=ioncore_find_stacking(reg);
 477             if(st!=NULL)
 478                 mplex_get_attach_params(src_mplex, st, &param);
 479         }
 480     }
 481
 482     param.flags|=(MPLEX_ATTACH_INDEX|
 483                   (flags&PHOLDER_ATTACH_SWITCHTO ? MPLEX_ATTACH_SWITCHTO : 0));
 484     param.index=LLIST_INDEX_LAST;
 485
 486     return mplex_do_attach(mplex, &param, data);
 487 }
 488
 489
 490 WPHolder *mplex_get_rescue_pholder_for(WMPlex *mplex, WRegion *mgd)
 491 {
 492 #if 0
 493     WStacking *st=mplex_find_stacking(mplex, mgd);
 494     WMPlexAttachParams param;
 495
 496     param.flags=MPLEX_ATTACH_INDEX;
 497     param.index=LLIST_INDEX_LAST;
 498
 499     return create_mplexpholder(mplex, st, &param);
 500 #else
 501     return (WPHolder*)create_basicpholder((WRegion*)mplex,
 502                                           (WBasicPHolderHandler*)mplex_rescue_attach);
 503 #endif
 504 }
 505
 506
 507 /*}}}*/
 508
 509
 510 /*{{{ Class information */
 511
 512
 513 static DynFunTab mplexpholder_dynfuntab[]={
 514     {(DynFun*)pholder_do_attach,
 515      (DynFun*)mplexpholder_do_attach},
 516
 517     {(DynFun*)pholder_do_goto,
 518      (DynFun*)mplexpholder_do_goto},
 519
 520     {(DynFun*)pholder_do_target,
 521      (DynFun*)mplexpholder_do_target},
 522
 523     {(DynFun*)pholder_stale,
 524      (DynFun*)mplexpholder_stale},
 525
 526     END_DYNFUNTAB
 527 };
 528
 529
 530 IMPLCLASS(WMPlexPHolder, WPHolder, mplexpholder_deinit,
 531           mplexpholder_dynfuntab);
 532
 533
 534 /*}}}*/
 535