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#include <fitz.h>
fz_error *
fz_newtree(fz_tree **treep)
{
fz_tree *tree;
tree = *treep = fz_malloc(sizeof (fz_tree));
if (!tree)
return fz_outofmem;
tree->refs = 1;
tree->root = nil;
tree->head = nil;
return nil;
}
fz_tree *
fz_keeptree(fz_tree *tree)
{
tree->refs ++;
return tree;
}
void
fz_droptree(fz_tree *tree)
{
if (--tree->refs == 0)
{
if (tree->root)
fz_dropnode(tree->root);
fz_free(tree);
}
}
fz_rect
fz_boundtree(fz_tree *tree, fz_matrix ctm)
{
if (tree->root)
return fz_boundnode(tree->root, ctm);
return fz_emptyrect;
}
void
fz_insertnodefirst(fz_node *parent, fz_node *child)
{
child->parent = parent;
child->next = parent->first;
parent->first = child;
if (!parent->last)
parent->last = child;
}
void
fz_insertnodelast(fz_node *parent, fz_node *child)
{
child->parent = parent;
if (!parent->first)
parent->first = child;
else
parent->last->next = child;
parent->last = child;
}
void
fz_insertnodeafter(fz_node *prev, fz_node *child)
{
fz_node *parent = prev->parent;
child->parent = parent;
if (parent->last == prev)
parent->last = child;
child->next = prev->next;
prev->next = child;
}
void
fz_removenode(fz_node *child)
{
fz_node *parent = child->parent;
fz_node *prev;
fz_node *node;
if (parent->first == child)
{
parent->first = child->next;
if (parent->last == child)
parent->last = nil;
return;
}
prev = parent->first;
node = prev->next;
while (node)
{
if (node == child)
{
prev->next = child->next;
}
prev = node;
node = node->next;
}
parent->last = prev;
}
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