ioncore/names.c

   1 /*
   2  * ion/ioncore/names.c
   3  *
   4  * Copyright (c) Tuomo Valkonen 1999-2009.
   5  *
   6  * See the included file LICENSE for details.
   7  */
   8
   9
  10 #include <string.h>
  11 #include <limits.h>
  12
  13 #include <libtu/rb.h>
  14 #include <libtu/minmax.h>
  15 #include <libtu/objp.h>
  16 #include <libextl/extl.h>
  17
  18 #include "common.h"
  19 #include "global.h"
  20 #include "region.h"
  21 #include "clientwin.h"
  22 #include "names.h"
  23 #include "strings.h"
  24 #include "gr.h"
  25
  26
  27 /*{{{ Implementation */
  28
  29
  30 WNamespace ioncore_internal_ns={NULL, FALSE};
  31 WNamespace ioncore_clientwin_ns={NULL, FALSE};
  32
  33
  34 static bool initialise_ns(WNamespace *ns)
  35 {
  36     if(ns->initialised)
  37         return TRUE;
  38
  39     if(ns->rb==NULL)
  40         ns->rb=make_rb();
  41
  42     ns->initialised=(ns->rb!=NULL);
  43
  44     return ns->initialised;
  45 }
  46
  47
  48 static int parseinst(const char *name, const char **startinst)
  49 {
  50     const char *p2, *p3=NULL;
  51     int inst;
  52     int l=strlen(name);
  53
  54     *startinst=name+l;
  55
  56     if(name[l-1]!='>')
  57         return -1;
  58
  59     p2=strrchr(name, '<');
  60     if(p2==NULL)
  61         return -1;
  62
  63     inst=strtoul(p2+1, (char**)&p3, 10);
  64
  65     if(inst<0 || p3!=name+l-1)
  66         return -1;
  67
  68     *startinst=p2;
  69     return inst;
  70 }
  71
  72
  73 static int parseinst_simple(const char *inststr)
  74 {
  75     const char *end=NULL;
  76     int inst;
  77
  78     if(*inststr=='\0')
  79         return 0;
  80
  81     if(*inststr=='<'){
  82         inst=strtoul(inststr+1, (char**)&end, 10);
  83
  84         if(inst>=0 && end!=NULL && *end=='>')
  85             return inst;
  86     }
  87
  88     warn(TR("Corrupt instance number %s."), inststr);
  89     return -1;
  90 }
  91
  92
  93 #define COMPARE_FN ((Rb_compfn*)compare_nameinfos)
  94
  95 static int compare_nameinfos(const WRegionNameInfo *ni1,
  96                              const WRegionNameInfo *ni2)
  97 {
  98     int l1=0, l2=0;
  99     int i1=0, i2=0;
 100     int mc=0;
 101
 102     /* Handle unnamed regions. */
 103
 104     if(ni1->name==NULL){
 105         if(ni2->name!=NULL)
 106             return 1;
 107         return (ni1==ni2 ? 0 : (ni1<ni2 ? -1 : 1));
 108     }else if(ni2->name==NULL){
 109         return -1;
 110     }
 111
 112     /* Special case: inst_off<0 means that -inst_off-1 is the actual
 113      * instance number and the name does not contain it.
 114      */
 115
 116     if(ni1->inst_off>=0)
 117         l1=ni1->inst_off;
 118     else
 119         l1=strlen(ni1->name);
 120
 121     if(ni2->inst_off>=0)
 122         l2=ni2->inst_off;
 123     else
 124         l2=strlen(ni2->name);
 125
 126     /* Check name part first */
 127
 128     mc=strncmp(ni1->name, ni2->name, minof(l1, l2));
 129
 130     if(mc!=0)
 131         return mc;
 132
 133     if(l1!=l2)
 134         return (l1<l2 ? -1 : 1);
 135
 136     /* Same name, different instance */
 137
 138     if(ni1->inst_off>=0)
 139         i1=parseinst_simple(ni1->name+ni1->inst_off);
 140     else
 141         i1=-ni1->inst_off-1; /*???*/
 142
 143     if(ni2->inst_off>=0)
 144         i2=parseinst_simple(ni2->name+ni2->inst_off);
 145     else
 146         i2=-ni2->inst_off-1; /*???*/
 147
 148     if(i1!=i2)
 149         return (i1<i2 ? -1 : 1);
 150
 151     /* Same name and instance */
 152
 153     return 0;
 154 }
 155
 156 static bool insert_reg(Rb_node tree, WRegion *reg)
 157 {
 158     assert(reg->ni.node==NULL);
 159     reg->ni.node=(void*)rb_insertg(tree, &(reg->ni), reg, COMPARE_FN);
 160     return (reg->ni.node!=NULL);
 161 }
 162
 163 static bool separated(const WRegionNameInfo *ni1,
 164                       const WRegionNameInfo *ni2, int *i1ret)
 165 {
 166     int l1, l2;
 167     int i1, i2;
 168     int mc;
 169
 170     assert(ni1->name!=NULL);
 171
 172     if(ni2->name==NULL){
 173         /* Shouldn't happen the way this function is called below; unnamed
 174          * regions are before others in the traversal order of the tree.
 175          */
 176         *i1ret=parseinst_simple(ni1->name+ni1->inst_off);
 177         return TRUE;
 178     }
 179
 180     assert(ni1->inst_off>=0 && ni2->inst_off>=0);
 181
 182     l1=ni1->inst_off;
 183     l2=ni2->inst_off;
 184
 185     i1=parseinst_simple(ni1->name+ni1->inst_off);
 186     *i1ret=i1;
 187
 188     if(l1!=l2)
 189         return TRUE;
 190
 191     if(memcmp(ni1->name, ni2->name, l1)!=0)
 192         return TRUE;
 193
 194     i2=parseinst_simple(ni2->name+ni2->inst_off);
 195
 196     return (i2>(i1+1));
 197 }
 198
 199
 200
 201 void region_unregister(WRegion *reg)
 202 {
 203     if(reg->ni.node!=NULL){
 204         rb_delete_node((Rb_node)reg->ni.node);
 205         reg->ni.node=NULL;
 206     }
 207
 208     if(reg->ni.name!=NULL){
 209         free(reg->ni.name);
 210         reg->ni.name=NULL;
 211         reg->ni.inst_off=0;
 212     }
 213 }
 214
 215
 216 static bool make_full_name(WRegionNameInfo *ni, const char *name, int inst,
 217                            bool append_always)
 218 {
 219     assert(ni->name==NULL);
 220
 221     if(inst==0 && !append_always)
 222         ni->name=scopy(name);
 223     else
 224         libtu_asprintf(&(ni->name), "%s<%d>", name, inst);
 225
 226     if(ni->name==NULL)
 227         return FALSE;
 228
 229     ni->inst_off=strlen(name);
 230
 231     return TRUE;
 232 }
 233
 234
 235 static bool do_use_name(WRegion *reg, WNamespace *ns, const char *name,
 236                         int instrq, bool failchange)
 237 {
 238     int parsed_inst=-1;
 239     WRegionNameInfo ni={NULL, 0, NULL};
 240     const char *dummy=NULL;
 241     Rb_node node;
 242     int inst=-1;
 243     int found=0;
 244
 245     parsed_inst=parseinst(name, &dummy);
 246
 247     if(!ns->initialised)
 248         return FALSE;
 249
 250     /* If there's something that looks like an instance at the end of
 251      * name, we will append the instance number.
 252      */
 253     if(parsed_inst>=0 && inst==0 && failchange)
 254         return FALSE;
 255
 256     if(instrq>=0){
 257         WRegionNameInfo tmpni;
 258         tmpni.name=(char*)name;
 259         tmpni.inst_off=-instrq-1;
 260         node=rb_find_gkey_n(ns->rb, &tmpni, COMPARE_FN, &found);
 261         if(found){
 262             if(rb_val(node)==(void*)reg){
 263                 /* The region already has the requested name */
 264                 return TRUE;
 265             }
 266             if(failchange)
 267                 return FALSE;
 268         }else{
 269             inst=instrq;
 270         }
 271     }
 272
 273     if(inst<0){
 274         WRegionNameInfo tmpni;
 275
 276         found=0;
 277         inst=0;
 278
 279         tmpni.name=(char*)name;
 280         tmpni.inst_off=-1;
 281         node=rb_find_gkey_n(ns->rb, &tmpni, COMPARE_FN, &found);
 282
 283         if(found){
 284             while(1){
 285                 Rb_node next=rb_next(node);
 286
 287                 if(rb_val(node)==(void*)reg){
 288                     /* The region already has a name of requested form */
 289                     return TRUE;
 290                 }
 291
 292                 if(next==rb_nil(ns->rb) ||
 293                    separated((const WRegionNameInfo*)node->k.key,
 294                              (const WRegionNameInfo*)next->k.key, &inst)){
 295                     /* 'inst' should be next free instance after increment
 296                      * as separation was greater then one.
 297                      */
 298                     inst++;
 299                     break;
 300                 }
 301
 302                 /* 'inst' should be instance of next after increment
 303                  * as separation was one.
 304                  */
 305                 inst++;
 306                 node=next;
 307             }
 308         }
 309     }
 310
 311     if(!make_full_name(&ni, name, inst, parsed_inst>=0))
 312         return FALSE;
 313
 314     /*
 315     rb_find_gkey_n(ns->rb, &ni, COMPARE_FN, &found);
 316
 317     assert(!found);
 318      */
 319
 320     region_unregister(reg);
 321
 322     reg->ni.name=ni.name;
 323     reg->ni.inst_off=ni.inst_off;
 324
 325     if(!insert_reg(ns->rb, reg)){
 326         free(reg->ni.name);
 327         reg->ni.name=NULL;
 328         reg->ni.inst_off=0;
 329         return FALSE;
 330     }
 331
 332     return TRUE;
 333 }
 334
 335
 336 static bool use_name_anyinst(WRegion *reg, WNamespace *ns, const char *name)
 337 {
 338     return do_use_name(reg, ns, name, -1, FALSE);
 339 }
 340
 341
 342 static bool use_name_exact(WRegion *reg, WNamespace *ns, const char *name)
 343 {
 344     return do_use_name(reg, ns, name, 0, TRUE);
 345 }
 346
 347
 348 static bool use_name_parseany(WRegion *reg, WNamespace *ns, const char *name)
 349 {
 350     int l, inst;
 351     const char *startinst;
 352
 353     l=strlen(name);
 354
 355     inst=parseinst(name, &startinst);
 356     if(inst>=0){
 357         bool retval=FALSE;
 358         int realnamelen=startinst-name;
 359         char *realname=ALLOC_N(char, realnamelen+1);
 360         if(realname!=NULL){
 361             memcpy(realname, name, realnamelen);
 362             realname[realnamelen]='\0';
 363             retval=do_use_name(reg, ns, realname, inst, FALSE);
 364             free(realname);
 365         }
 366         return retval;
 367     }
 368
 369     return do_use_name(reg, ns, name, 0, FALSE);
 370 }
 371
 372
 373
 374 /*}}}*/
 375
 376
 377 /*{{{ Interface */
 378
 379
 380 /*EXTL_DOC
 381  * Returns the name for \var{reg}.
 382  */
 383 EXTL_SAFE
 384 EXTL_EXPORT_MEMBER
 385 const char *region_name(WRegion *reg)
 386 {
 387     return reg->ni.name;
 388 }
 389
 390
 391 static bool do_set_name(bool (*fn)(WRegion *reg, WNamespace *ns, const char *p),
 392                         WRegion *reg, WNamespace *ns, const char *p)
 393 {
 394     bool ret=TRUE;
 395     char *nm=NULL;
 396
 397     if(!initialise_ns(ns))
 398         return FALSE;
 399
 400     if(p!=NULL){
 401         nm=scopy(p);
 402         if(nm==NULL)
 403             return FALSE;
 404         str_stripws(nm);
 405     }
 406
 407     if(nm==NULL || *nm=='\0'){
 408         region_unregister(reg);
 409         ret=insert_reg(ns->rb, reg);
 410     }else{
 411         ret=fn(reg, ns, nm);
 412     }
 413
 414     if(nm!=NULL)
 415         free(nm);
 416
 417     region_notify_change(reg, ioncore_g.notifies.name);
 418
 419     return ret;
 420 }
 421
 422
 423 bool region_register(WRegion *reg)
 424 {
 425     assert(reg->ni.name==NULL);
 426
 427     if(!initialise_ns(&ioncore_internal_ns))
 428         return FALSE;
 429
 430     return use_name_anyinst(reg, &ioncore_internal_ns, OBJ_TYPESTR(reg));
 431 }
 432
 433
 434 bool clientwin_register(WClientWin *cwin)
 435 {
 436     WRegion *reg=(WRegion*)cwin;
 437
 438     assert(reg->ni.name==NULL);
 439
 440     if(!initialise_ns(&ioncore_clientwin_ns))
 441         return FALSE;
 442
 443     return insert_reg(ioncore_clientwin_ns.rb, (WRegion*)cwin);
 444 }
 445
 446
 447 /*EXTL_DOC
 448  * Set the name of \var{reg} to \var{p}. If the name is already in use,
 449  * an instance number suffix \codestr{<n>} will be attempted. If \var{p} has
 450  * such a suffix, it will be modified, otherwise such a suffix will be
 451  * added. Setting \var{p} to nil will cause current name to be removed.
 452  */
 453 EXTL_EXPORT_MEMBER
 454 bool region_set_name(WRegion *reg, const char *p)
 455 {
 456 /*    return do_set_name(use_name_parseany, reg, &ioncore_internal_ns, p);*/
 457     return do_set_name(use_name_parseany, reg,
 458             OBJ_IS(reg, WClientWin) ? &ioncore_clientwin_ns : &ioncore_internal_ns,
 459             p);
 460 }
 461
 462
 463 /*EXTL_DOC
 464  * Similar to \fnref{WRegion.set_name} except if the name is already in use,
 465  * other instance numbers will not be attempted. The string \var{p} should
 466  * not contain a \codestr{<n>} suffix or this function will fail.
 467  */
 468 EXTL_EXPORT_MEMBER
 469 bool region_set_name_exact(WRegion *reg, const char *p)
 470 {
 471     return do_set_name(use_name_exact, reg, &ioncore_internal_ns, p);
 472 }
 473
 474
 475 bool clientwin_set_name(WClientWin *cwin, const char *p)
 476 {
 477     return do_set_name(use_name_anyinst, (WRegion*)cwin,
 478                        &ioncore_clientwin_ns, p);
 479 }
 480
 481
 482 /*}}}*/
 483
 484
 485 /*{{{ Lookup and list */
 486
 487
 488 static WRegion *do_lookup_region(WNamespace *ns, const char *cname,
 489                                  const char *typenam)
 490 {
 491     WRegionNameInfo ni;
 492     Rb_node node;
 493     int found=0;
 494     const char *instptr=NULL;
 495
 496     if(cname==NULL || !ns->initialised)
 497         return NULL;
 498
 499     parseinst(cname, &instptr);
 500     assert(instptr!=NULL);
 501
 502     ni.name=(char*)cname;
 503     ni.inst_off=instptr-cname;
 504
 505     node=rb_find_gkey_n(ns->rb, &ni, COMPARE_FN, &found);
 506
 507     if(!found)
 508         return NULL;
 509
 510     if(typenam!=NULL && !obj_is_str((Obj*)node->v.val, typenam))
 511         return NULL;
 512
 513     return (WRegion*)node->v.val;
 514 }
 515
 516
 517 /*EXTL_DOC
 518  * Attempt to find a non-client window region with name \var{name} and type
 519  * inheriting \var{typenam}.
 520  */
 521 EXTL_SAFE
 522 EXTL_EXPORT
 523 WRegion *ioncore_lookup_region(const char *name, const char *typenam)
 524 {
 525     return do_lookup_region(&ioncore_internal_ns, name, typenam);
 526 }
 527
 528
 529 /*EXTL_DOC
 530  * Attempt to find a client window with name \var{name}.
 531  */
 532 EXTL_SAFE
 533 EXTL_EXPORT
 534 WClientWin *ioncore_lookup_clientwin(const char *name)
 535 {
 536     return (WClientWin*)do_lookup_region(&ioncore_clientwin_ns, name,
 537                                          "WClientWin");
 538 }
 539
 540
 541 static bool do_list(ExtlFn fn, WNamespace *ns, const char *typenam)
 542 {
 543     Rb_node node;
 544     int n=0;
 545
 546     if(!ns->initialised)
 547         return FALSE;
 548
 549     rb_traverse(node, ns->rb){
 550         WRegion *reg=(WRegion*)node->v.val;
 551
 552         assert(reg!=NULL);
 553
 554         if(typenam!=NULL && !obj_is_str((Obj*)reg, typenam))
 555             continue;
 556
 557         if(!extl_iter_obj(fn, (Obj*)reg))
 558             return FALSE;
 559     }
 560
 561     return TRUE;
 562 }
 563
 564
 565 /*EXTL_DOC
 566  * Iterate over all non-client window regions with (inherited) class
 567  * \var{typenam} until \var{iterfn} returns \code{false}.
 568  * The function is called in protected mode.
 569  * This routine returns \code{true} if it reaches the end of list
 570  * without this happening.
 571  */
 572 EXTL_SAFE
 573 EXTL_EXPORT
 574 bool ioncore_region_i(ExtlFn fn, const char *typenam)
 575 {
 576     return do_list(fn, &ioncore_internal_ns, typenam);
 577 }
 578
 579
 580 /*EXTL_DOC
 581  * Iterate over client windows until \var{iterfn} returns \code{false}.
 582  * The function is called in protected mode.
 583  * This routine returns \code{true} if it reaches the end of list
 584  * without this happening.
 585  */
 586 EXTL_SAFE
 587 EXTL_EXPORT
 588 bool ioncore_clientwin_i(ExtlFn fn)
 589 {
 590     return do_list(fn, &ioncore_clientwin_ns, NULL);
 591 }
 592
 593
 594 /*}}}*/
 595
 596
 597 /*{{{ Displayname */
 598
 599
 600 const char *region_displayname(WRegion *reg)
 601 {
 602     const char *ret=NULL;
 603     CALL_DYN_RET(ret, const char *, region_displayname, reg, (reg));
 604     return ret;
 605 }
 606
 607
 608 char *region_make_label(WRegion *reg, int maxw, GrBrush *brush)
 609 {
 610     const char *name=region_displayname(reg);
 611
 612     if(name==NULL)
 613         return NULL;
 614
 615     return grbrush_make_label(brush, name, maxw);
 616 }
 617
 618
 619 /*}}}*/