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ncplane_reparent_family: fix up z-axes #1078

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nick black 2020-11-24 03:15:55 -05:00
parent 3ce7d36eed
commit a7c7b8ff0b
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GPG Key ID: 5F43400C21CBFACC
1 changed files with 41 additions and 18 deletions
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59
src/lib/notcurses.c
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@ -391,6 +391,7 @@ ncplane* ncplane_new_internal(notcurses* nc, ncplane* n,
if(nc == NULL){ // fake ncplane backing ncdirect object
p->above = NULL;
p->below = NULL;
p->pile = NULL;
}else{
pthread_mutex_lock(&nc->pilelock);
ncpile* pile = n ? ncplane_pile(n) : NULL;
@ -2203,6 +2204,43 @@ ncplane* ncplane_reparent(ncplane* n, ncplane* newparent){
return ncplane_reparent_family(n, newparent);
}
// unsplice self from the z-axis, and then unsplice all children, recursively.
// to be called before unbinding 'n' from old pile.
static void
unsplice_zaxis_recursive(ncplane* n){
if(ncplane_pile(n)->top == n){
ncplane_pile(n)->top = n->below;
}else{
n->above->below = n->below;
}
if(ncplane_pile(n)->bottom == n){
ncplane_pile(n)->bottom = n->above;
}else{
n->below->above = n->above;
}
for(ncplane* child = n->blist ; child ; child = child->bnext){
unsplice_zaxis_recursive(child);
}
}
// recursively splice 'n' and children into the z-axis, above 'n->boundto'.
// handles 'n' == 'n->boundto'. to be called after binding 'n' into new pile.
static void
splice_zaxis_recursive(ncplane* n){
if(n != n->boundto){
if((n->above = n->boundto->above) == NULL){
n->pile->top = n;
}else{
n->boundto->above->below = n;
}
n->below = n->boundto;
n->boundto->above = n;
}
for(ncplane* child = n->blist ; child ; child = child->bnext){
splice_zaxis_recursive(child);
}
}
ncplane* ncplane_reparent_family(ncplane* n, ncplane* newparent){
if(n == ncplane_notcurses(n)->stdplane){
return NULL; // can't reparent standard plane
@ -2222,17 +2260,7 @@ ncplane* ncplane_reparent_family(ncplane* n, ncplane* newparent){
}
// if leaving a pile, extract n from the old zaxis
if(n == newparent || ncplane_pile(n) != ncplane_pile(newparent)){
// FIXME need remove full family from z-axis, not just n!
if(ncplane_pile(n)->top == n){
ncplane_pile(n)->top = n->below;
}else{
n->above->below = n->below;
}
if(ncplane_pile(n)->bottom == n){
ncplane_pile(n)->bottom = n->above;
}else{
n->below->above = n->above;
}
unsplice_zaxis_recursive(n);
}
n->boundto = newparent;
if(n == n->boundto){ // we're a new root plane
@ -2244,6 +2272,7 @@ ncplane* ncplane_reparent_family(ncplane* n, ncplane* newparent){
}
make_ncpile(ncplane_notcurses(n), n);
pthread_mutex_unlock(&ncplane_notcurses(n)->pilelock);
splice_zaxis_recursive(n);
}else{ // establish ourselves as a sibling of new parent's children
n->absx += n->boundto->absx;
n->absy += n->boundto->absy;
@ -2255,13 +2284,7 @@ ncplane* ncplane_reparent_family(ncplane* n, ncplane* newparent){
// place it immediately above the new binding plane if crossing piles
if(n->pile != ncplane_pile(n->boundto)){
n->pile = ncplane_pile(n->boundto);
if((n->above = n->boundto->above) == NULL){
n->pile->top = n;
}else{
n->boundto->above->below = n;
}
n->below = n->boundto;
n->boundto->above = n;
splice_zaxis_recursive(n);
}
}
return n;