ioncore/regbind.c

   1 /*
   2  * ion/regbind.c
   3  *
   4  * Copyright (c) Tuomo Valkonen 1999-2009.
   5  *
   6  * See the included file LICENSE for details.
   7  */
   8
   9 #include <string.h>
  10 #include <libtu/objp.h>
  11 #include <libmainloop/defer.h>
  12 #include "common.h"
  13 #include "region.h"
  14 #include "binding.h"
  15 #include "regbind.h"
  16
  17
  18 /*{{{ Grab/ungrab */
  19
  20
  21 static void do_binding_grab_on_ungrab_on(const WRegion *reg,
  22                                          const WBinding *binding,
  23                                          const WBindmap *bindmap, bool grab)
  24 {
  25     Window win=region_xwindow(reg);
  26     WRegBindingInfo *r;
  27
  28     for(r=reg->bindings; r!=NULL; r=r->next){
  29         if(r->bindmap==bindmap)
  30             continue;
  31         if(bindmap_lookup_binding(r->bindmap, binding->act, binding->state,
  32                                   binding->kcb)!=NULL)
  33             break;
  34     }
  35     if(r==NULL && binding->area==0){
  36         if(grab)
  37             binding_grab_on(binding, win);
  38         else
  39             binding_ungrab_on(binding, win);
  40     }
  41 }
  42
  43
  44 static void do_binding_grab_on_ungrab_ons(const WRegion *reg,
  45                                           const WBindmap *bindmap,
  46                                           bool grab)
  47 {
  48     Rb_node node=NULL;
  49     WBinding *binding=NULL;
  50
  51     if(!(reg->flags&REGION_BINDINGS_ARE_GRABBED) ||
  52        bindmap->bindings==NULL){
  53         return;
  54     }
  55
  56     FOR_ALL_BINDINGS(binding, node, bindmap->bindings){
  57         do_binding_grab_on_ungrab_on(reg, binding, bindmap, grab);
  58     }
  59 }
  60
  61
  62 static void grab_ungrabbed_bindings(const WRegion *reg, const WBindmap *bindmap)
  63 {
  64     do_binding_grab_on_ungrab_ons(reg, bindmap, TRUE);
  65 }
  66
  67
  68 static void ungrab_freed_bindings(const WRegion *reg, const WBindmap *bindmap)
  69 {
  70     do_binding_grab_on_ungrab_ons(reg, bindmap, FALSE);
  71 }
  72
  73
  74 void rbind_binding_added(const WRegBindingInfo *rbind,
  75                          const WBinding *binding,
  76                          const WBindmap *bindmap)
  77 {
  78     if(binding->area==0 && rbind->reg->flags&REGION_BINDINGS_ARE_GRABBED)
  79         do_binding_grab_on_ungrab_on(rbind->reg, binding, rbind->bindmap, TRUE);
  80 }
  81
  82
  83 void rbind_binding_removed(const WRegBindingInfo *rbind,
  84                            const WBinding *binding,
  85                            const WBindmap *bindmap)
  86 {
  87     if(binding->area==0 && rbind->reg->flags&REGION_BINDINGS_ARE_GRABBED)
  88         do_binding_grab_on_ungrab_on(rbind->reg, binding, rbind->bindmap, FALSE);
  89 }
  90
  91
  92 /*}}}*/
  93
  94
  95 /*{{{ Find */
  96
  97
  98 static WRegBindingInfo *find_rbind(WRegion *reg, WBindmap *bindmap,
  99                                    WRegion *owner)
 100 {
 101     WRegBindingInfo *rbind;
 102
 103     for(rbind=(WRegBindingInfo*)reg->bindings; rbind!=NULL; rbind=rbind->next){
 104         if(rbind->bindmap==bindmap && rbind->owner==owner)
 105             return rbind;
 106     }
 107
 108     return NULL;
 109 }
 110
 111
 112 /*}}}*/
 113
 114
 115 /*{{{ Interface */
 116
 117
 118 static WRegBindingInfo *region_do_add_bindmap_owned(WRegion *reg,
 119                                                     WBindmap *bindmap,
 120                                                     WRegion *owner,
 121                                                     bool first)
 122 {
 123     WRegBindingInfo *rbind;
 124
 125     if(bindmap==NULL)
 126         return NULL;
 127
 128     rbind=ALLOC(WRegBindingInfo);
 129
 130     if(rbind==NULL)
 131         return NULL;
 132
 133     rbind->bindmap=bindmap;
 134     rbind->owner=owner;
 135     rbind->reg=reg;
 136     rbind->tmp=0;
 137
 138     LINK_ITEM(bindmap->rbind_list, rbind, bm_next, bm_prev);
 139
 140     if(region_xwindow(reg)!=None && !(reg->flags&REGION_GRAB_ON_PARENT))
 141         grab_ungrabbed_bindings(reg, bindmap);
 142
 143     /* Link to reg's rbind list*/ {
 144         WRegBindingInfo *b=reg->bindings;
 145         if(first){
 146             LINK_ITEM_FIRST(b, rbind, next, prev);
 147         }else{
 148             LINK_ITEM_LAST(b, rbind, next, prev);
 149         }
 150         reg->bindings=b;
 151     }
 152
 153     return rbind;
 154 }
 155
 156
 157 bool region_add_bindmap(WRegion *reg, WBindmap *bindmap)
 158 {
 159     if(find_rbind(reg, bindmap, NULL)!=NULL)
 160         return FALSE;
 161     return (region_do_add_bindmap_owned(reg, bindmap, NULL, TRUE)!=NULL);
 162 }
 163
 164
 165 static void remove_rbind(WRegion *reg, WRegBindingInfo *rbind)
 166 {
 167     UNLINK_ITEM(rbind->bindmap->rbind_list, rbind, bm_next, bm_prev);
 168
 169     /* Unlink from reg's rbind list*/ {
 170         WRegBindingInfo *b=reg->bindings;
 171         UNLINK_ITEM(b, rbind, next, prev);
 172         reg->bindings=b;
 173     }
 174
 175     if(region_xwindow(reg)!=None && !(reg->flags&REGION_GRAB_ON_PARENT))
 176         ungrab_freed_bindings(reg, rbind->bindmap);
 177
 178     free(rbind);
 179 }
 180
 181
 182 void region_remove_bindmap(WRegion *reg, WBindmap *bindmap)
 183 {
 184     WRegBindingInfo *rbind=find_rbind(reg, bindmap, NULL);
 185     if(rbind!=NULL)
 186         remove_rbind(reg, rbind);
 187 }
 188
 189
 190 void region_remove_bindings(WRegion *reg)
 191 {
 192     WRegBindingInfo *rbind;
 193
 194     while((rbind=(WRegBindingInfo*)reg->bindings)!=NULL)
 195         remove_rbind(reg, rbind);
 196 }
 197
 198
 199 WBinding *region_lookup_keybinding(WRegion *reg,
 200                                    int act, uint state, uint kcb,
 201                                    const WSubmapState *sc,
 202                                    WRegion **binding_owner_ret)
 203 {
 204     WRegBindingInfo *rbind=NULL;
 205     WBinding *binding=NULL;
 206     const WSubmapState *s=NULL;
 207     WBindmap *bindmap=NULL;
 208     int i;
 209
 210     *binding_owner_ret=reg;
 211
 212     for(rbind=(WRegBindingInfo*)reg->bindings; rbind!=NULL; rbind=rbind->next){
 213         bindmap=rbind->bindmap;
 214
 215         for(s=sc; s!=NULL && bindmap!=NULL; s=s->next){
 216             binding=bindmap_lookup_binding(bindmap, BINDING_KEYPRESS, s->state, s->key);
 217
 218             if(binding==NULL){
 219                 bindmap=NULL;
 220                 break;
 221             }
 222
 223             bindmap=binding->submap;
 224         }
 225
 226         if(bindmap==NULL){
 227             /* There may be no next iteration so we must reset binding here
 228              * because we have not found a proper binding.
 229              */
 230             binding=NULL;
 231             continue;
 232         }
 233
 234         binding=bindmap_lookup_binding(bindmap, act, state, kcb);
 235
 236         if(binding!=NULL)
 237             break;
 238     }
 239
 240     if(binding!=NULL && rbind->owner!=NULL)
 241         *binding_owner_ret=rbind->owner;
 242
 243     return binding;
 244 }
 245
 246
 247 WBinding *region_lookup_binding(WRegion *reg, int act, uint state,
 248                                 uint kcb, int area)
 249 {
 250     WRegBindingInfo *rbind;
 251     WBinding *binding=NULL;
 252
 253     for(rbind=(WRegBindingInfo*)reg->bindings; rbind!=NULL; rbind=rbind->next){
 254         if(rbind->owner!=NULL)
 255             continue;
 256         binding=bindmap_lookup_binding_area(rbind->bindmap, act, state, kcb, area);
 257         if(binding!=NULL)
 258             break;
 259     }
 260
 261     return binding;
 262 }
 263
 264
 265 /*}}}*/
 266
 267
 268 /*{{{ Update */
 269
 270
 271 static void add_bindings(WRegion *reg, WRegion *r2)
 272 {
 273     WRegion *rx=REGION_MANAGER(r2);
 274     WRegBindingInfo *rbind, *rb2;
 275     WBinding *binding=NULL;
 276
 277     if(rx!=NULL && REGION_PARENT_REG(rx)==reg){
 278         /* The recursion is here to get the bindmaps correctly ordered. */
 279         add_bindings(reg, rx);
 280     }
 281
 282     if(r2->flags&REGION_GRAB_ON_PARENT){
 283         for(rb2=(WRegBindingInfo*)r2->bindings; rb2!=NULL; rb2=rb2->next){
 284             rbind=find_rbind(reg, rb2->bindmap, r2);
 285             if(rbind==NULL){
 286                 rbind=region_do_add_bindmap_owned(reg, rb2->bindmap,
 287                                                   r2, TRUE);
 288             }
 289             if(rbind!=NULL)
 290                 rbind->tmp=1;
 291         }
 292     }
 293 }
 294
 295
 296 void region_do_update_owned_grabs(WRegion *reg)
 297 {
 298     WRegBindingInfo *rbind, *rb2;
 299
 300     reg->flags&=~REGION_BINDING_UPDATE_SCHEDULED;
 301
 302     /* clear flags */
 303     for(rbind=(WRegBindingInfo*)reg->bindings; rbind!=NULL; rbind=rbind->next)
 304         rbind->tmp=0;
 305
 306     /* make new grabs */
 307     if(reg->active_sub!=NULL)
 308         add_bindings(reg, reg->active_sub);
 309
 310     /* remove old grabs */
 311     for(rbind=(WRegBindingInfo*)reg->bindings; rbind!=NULL; rbind=rb2){
 312         rb2=rbind->next;
 313         if(rbind->tmp!=1 && rbind->owner!=NULL)
 314             remove_rbind(reg, rbind);
 315     }
 316 }
 317
 318 void region_update_owned_grabs(WRegion *reg)
 319 {
 320     if(reg->flags&REGION_BINDING_UPDATE_SCHEDULED
 321        || OBJ_IS_BEING_DESTROYED(reg)
 322        || ioncore_g.opmode==IONCORE_OPMODE_DEINIT){
 323         return;
 324     }
 325
 326     if(mainloop_defer_action((Obj*)reg,
 327                              (WDeferredAction*)region_do_update_owned_grabs)){
 328         reg->flags|=REGION_BINDING_UPDATE_SCHEDULED;
 329     }else{
 330         region_do_update_owned_grabs(reg);
 331     }
 332 }
 333
 334
 335 /*}}}*/