DeepStyleWalker::DeepStyleWalker (Style **styles, Types *types)
{
// Create a list of all Setters in the style sorted by their DP.
// Use the hashtable to ensure that we only take the first setter
// declared for each DP (i.e. if the BasedOn style and main style
// have setters for the same DP, we ignore the BasedOn one
// NOTE: This can be pre-computed and cached as once a style is
// sealed it can never be changed.
this->offset = 0;
this->types = types || !styles[0] ? types : styles[0]->GetDeployment ()->GetTypes ();
this->setter_list = g_ptr_array_new ();
if (!styles)
return;
GHashTable *styles_seen = g_hash_table_new (g_direct_hash, g_direct_equal);
GHashTable *dps = g_hash_table_new (g_direct_hash, g_direct_equal);
for (int i = 0; styles[i]; i ++) {
Style *style = styles[i];
while (style != NULL) {
if (g_hash_table_lookup (styles_seen, style))
continue;
SetterBaseCollection *setters = style->GetSetters ();
int count = setters ? setters->GetCount () : 0;
for (int i = count-1; i >= 0; i--) {
Value *v = setters->GetValueAt (i);
if (Value::IsNull (v) || !types->IsSubclassOf (v->GetKind (), Type::SETTER))
continue;
Setter *setter = v->AsSetter ();
Value* dpVal = setter->GetValue (Setter::PropertyProperty);
if (Value::IsNull (dpVal))
continue;
DependencyProperty *prop = dpVal->AsDependencyProperty ();
if (!g_hash_table_lookup_extended (dps, prop, NULL, NULL)) {
g_hash_table_insert (dps, prop, setter);
g_ptr_array_add (setter_list, setter);
}
}
g_hash_table_insert (styles_seen, style, style);
style = style->GetBasedOn ();
}
}
g_hash_table_destroy (dps);
g_hash_table_destroy (styles_seen);
g_ptr_array_sort (setter_list, SetterComparer);
}
