// Token: 0x06001C86 RID: 7302 RVA: 0x000860FC File Offset: 0x000842FC
private void ChooseActiveBindingExpression(DependencyObject target)
{
int count = this.MutableBindingExpressions.Count;
int i;
for (i = 0; i < count; i++)
{
BindingExpressionBase bindingExpressionBase = this.MutableBindingExpressions[i];
if (bindingExpressionBase.StatusInternal == BindingStatusInternal.Inactive)
{
bindingExpressionBase.Activate();
}
if (bindingExpressionBase.StatusInternal == BindingStatusInternal.Active || bindingExpressionBase.UsingFallbackValue)
{
break;
}
}
int num = (i < count) ? i : -1;
if (num != this._activeIndex)
{
int activeIndex = this._activeIndex;
this._activeIndex = num;
base.AdoptProperties(this.ActiveBindingExpression);
WeakDependencySource[] newSources = BindingExpressionBase.CombineSources(-1, this.MutableBindingExpressions, this.AttentiveBindingExpressions, null, null);
base.ChangeSources(newSources);
if (num != -1)
{
for (i = activeIndex; i > num; i--)
{
this.MutableBindingExpressions[i].Deactivate();
}
}
}
}
// Re-evaluate the choice of active BindingExpression
void ChooseActiveBindingExpression(DependencyObject target)
{
int i, count = MutableBindingExpressions.Count;
for (i = 0; i < count; ++i)
{
BindingExpressionBase bindExpr = MutableBindingExpressions[i];
// Try to activate the BindingExpression if it isn't already activate
if (bindExpr.StatusInternal == BindingStatusInternal.Inactive)
{
bindExpr.Activate();
}
if (bindExpr.StatusInternal == BindingStatusInternal.Active || bindExpr.UsingFallbackValue)
{
break;
}
}
int newActiveIndex = (i < count) ? i : NoActiveBindingExpressions;
// if active changes, adjust state
if (newActiveIndex != _activeIndex)
{
int oldActiveIndex = _activeIndex;
_activeIndex = newActiveIndex;
// adopt the properties of the active binding
AdoptProperties(ActiveBindingExpression);
// tell the property engine the new list of sources
WeakDependencySource[] newSources = CombineSources(-1, MutableBindingExpressions, AttentiveBindingExpressions, null);
ChangeSources(newSources);
// deactivate BindingExpressions that don't need to be attentive
// BUG: only those with (StatusInternal == BindingStatusInternal.Active) will be deactivated
if (newActiveIndex != NoActiveBindingExpressions)
{
for (i = oldActiveIndex; i > newActiveIndex; --i)
{
MutableBindingExpressions[i].Deactivate();
}
}
}
}