internal static void UpdateSourceDependentLists(DependencyObject d, DependencyProperty dp, DependencySource[] sources, Expression expr, bool add)
{
// Sources already validated to be on the same thread as Dependent (d)
if (sources != null)
{
// don't hold a reference on the dependent if the expression is doing
// the invalidations. This helps avoid memory leaks (bug 871139)
if (expr.ForwardsInvalidations)
{
d = null;
dp = null;
}
for (int i = 0; i < sources.Length; i++)
{
DependencySource source = sources[i];
// A Sealed DependencyObject does not have a Dependents list
// so don't bother updating it (or attempt to add one).
Debug.Assert((!source.DependencyObject.IsSealed) ||
(DependentListMapField.GetValue(source.DependencyObject) == default(object)));
if (!source.DependencyObject.IsSealed)
{
// Retrieve the DependentListMap for this source
// The list of dependents to invalidate is stored using a special negative key
FrugalMap dependentListMap;
object value = DependentListMapField.GetValue(source.DependencyObject);
if (value != null)
{
dependentListMap = (FrugalMap)value;
}
else
{
dependentListMap = new FrugalMap();
}
// Get list of DependentList off of ID map of Source
object dependentListObj = dependentListMap[source.DependencyProperty.GlobalIndex];
Debug.Assert(dependentListObj != null, "dependentList should either be unset or non-null");
// Add/Remove new Dependent (this) to Source's list
if (add)
{
DependentList dependentList;
if (dependentListObj == DependencyProperty.UnsetValue)
{
dependentListMap[source.DependencyProperty.GlobalIndex] = dependentList = new DependentList();
}
else
{
dependentList = (DependentList)dependentListObj;
}
dependentList.Add(d, dp, expr);
}
else
{
if (dependentListObj != DependencyProperty.UnsetValue)
{
DependentList dependentList = (DependentList)dependentListObj;
dependentList.Remove(d, dp, expr);
if (dependentList.IsEmpty)
{
// No more dependencies for this property; reclaim the space if we can.
dependentListMap[source.DependencyProperty.GlobalIndex] = DependencyProperty.UnsetValue;
}
}
}
// Set the updated struct back into the source's _localStore.
DependentListMapField.SetValue(source.DependencyObject, dependentListMap);
}
}
}
}
/// <summary>
/// Constructor for EventHandlersStore
/// </summary>
public EventHandlersStore()
{
_entries = new FrugalMap();
}
// Called during Style/Template Seal when encountering a property trigger that
// has associated TriggerActions.
internal static void AddPropertyTriggerWithAction(TriggerBase triggerBase,
DependencyProperty property, ref FrugalMap triggersWithActions)
{
object existing = triggersWithActions[property.GlobalIndex];
if( existing == DependencyProperty.UnsetValue )
{
// No existing trigger, we put given trigger as entry.
triggersWithActions[property.GlobalIndex] = triggerBase;
}
else
{
TriggerBase existingTriggerBase = existing as TriggerBase;
if( existingTriggerBase != null )
{
List<TriggerBase> newList = new List<TriggerBase>();
newList.Add(existingTriggerBase);
newList.Add(triggerBase);
triggersWithActions[property.GlobalIndex] = newList;
}
else
{
Debug.Assert( existing is List<TriggerBase>,
"FrugalMap for holding List<TriggerBase> is holding an instance of unexpected type " + existing.GetType() );
List<TriggerBase> existingList = (List<TriggerBase>)existing;
existingList.Add(triggerBase);
}
}
// Note the order in which we processed this trigger.
triggerBase.EstablishLayer();
}
//
// This method
// 1. Adds shared table entries for property values set via Triggers
//
private static void ProcessTemplateTriggers(
TriggerCollection triggers,
FrameworkTemplate frameworkTemplate,
ref FrugalStructList<ChildRecord> childRecordFromChildIndex,
ref FrugalStructList<ItemStructMap<TriggerSourceRecord>> triggerSourceRecordFromChildIndex,
ref FrugalStructList<ContainerDependent> containerDependents,
ref FrugalStructList<ChildPropertyDependent> resourceDependents,
ref ItemStructList<ChildEventDependent> eventDependents,
ref HybridDictionary dataTriggerRecordFromBinding,
HybridDictionary childIndexFromChildID,
ref bool hasInstanceValues,
ref HybridDictionary triggerActions,
FrameworkElementFactory templateRoot,
ref EventHandlersStore eventHandlersStore,
ref FrugalMap propertyTriggersWithActions,
ref HybridDictionary dataTriggersWithActions,
ref bool hasLoadedChangeHandler)
{
if (triggers != null)
{
int triggerCount = triggers.Count;
for (int i = 0; i < triggerCount; i++)
{
TriggerBase triggerBase = triggers[i];
Trigger trigger;
MultiTrigger multiTrigger;
DataTrigger dataTrigger;
MultiDataTrigger multiDataTrigger;
EventTrigger eventTrigger;
DetermineTriggerType( triggerBase, out trigger, out multiTrigger, out dataTrigger, out multiDataTrigger, out eventTrigger );
if ( trigger != null || multiTrigger != null||
dataTrigger != null || multiDataTrigger != null )
{
// Update the SourceChildIndex for each of the conditions for this trigger
TriggerCondition[] conditions = triggerBase.TriggerConditions;
for (int k=0; k<conditions.Length; k++)
{
conditions[k].SourceChildIndex = StyleHelper.QueryChildIndexFromChildName(conditions[k].SourceName, childIndexFromChildID);
}
// Set things up to handle Setter values
for (int j = 0; j < triggerBase.PropertyValues.Count; j++)
{
PropertyValue propertyValue = triggerBase.PropertyValues[j];
// Check for trigger rules that act on template children
if (propertyValue.ChildName == StyleHelper.SelfName)
{
// "Self" (container) trigger
// Track properties on the container that are being driven by
// the Template so that they can be invalidated during Template changes
StyleHelper.AddContainerDependent(propertyValue.Property, true /*fromVisualTrigger*/, ref containerDependents);
}
StyleHelper.UpdateTables(ref propertyValue, ref childRecordFromChildIndex,
ref triggerSourceRecordFromChildIndex, ref resourceDependents, ref dataTriggerRecordFromBinding,
childIndexFromChildID, ref hasInstanceValues);
}
// Set things up to handle TriggerActions
if( triggerBase.HasEnterActions || triggerBase.HasExitActions )
{
if( trigger != null )
{
StyleHelper.AddPropertyTriggerWithAction( triggerBase, trigger.Property, ref propertyTriggersWithActions );
}
else if( multiTrigger != null )
{
for( int k = 0; k < multiTrigger.Conditions.Count; k++ )
{
Condition triggerCondition = multiTrigger.Conditions[k];
StyleHelper.AddPropertyTriggerWithAction( triggerBase, triggerCondition.Property, ref propertyTriggersWithActions );
}
}
else if( dataTrigger != null )
{
StyleHelper.AddDataTriggerWithAction( triggerBase, dataTrigger.Binding, ref dataTriggersWithActions );
}
else if( multiDataTrigger != null )
{
for( int k = 0; k < multiDataTrigger.Conditions.Count; k++ )
{
Condition dataCondition = multiDataTrigger.Conditions[k];
StyleHelper.AddDataTriggerWithAction( triggerBase, dataCondition.Binding, ref dataTriggersWithActions );
}
}
else
{
throw new InvalidOperationException(SR.Get(SRID.UnsupportedTriggerInTemplate, triggerBase.GetType().Name));
}
}
}
else if( eventTrigger != null )
{
StyleHelper.ProcessEventTrigger(eventTrigger,
childIndexFromChildID,
ref triggerActions,
ref eventDependents,
templateRoot,
frameworkTemplate,
ref eventHandlersStore,
ref hasLoadedChangeHandler);
}
else
{
throw new InvalidOperationException(SR.Get(SRID.UnsupportedTriggerInTemplate, triggerBase.GetType().Name));
}
}
}
}
//
// This method
// 1. Is invoked when Styled/Templated container property invalidation
// is propagated to its dependent properties from Style/Template.
//
internal static void OnTriggerSourcePropertyInvalidated(
Style ownerStyle,
FrameworkTemplate frameworkTemplate,
DependencyObject container,
DependencyProperty dp,
DependencyPropertyChangedEventArgs changedArgs,
bool invalidateOnlyContainer,
ref FrugalStructList<ItemStructMap<TriggerSourceRecord>> triggerSourceRecordFromChildIndex,
ref FrugalMap propertyTriggersWithActions,
int sourceChildIndex)
{
Debug.Assert(ownerStyle != null || frameworkTemplate != null );
///////////////////////////////////////////////////////////////////
// Update all values affected by property trigger Setters
// Check if this Child Index is represented in given data-structure
if ((0 <= sourceChildIndex) && (sourceChildIndex < triggerSourceRecordFromChildIndex.Count))
{
// Fetch the triggerSourceRecordMap for the given childIndex
ItemStructMap<TriggerSourceRecord> triggerSourceRecordMap = triggerSourceRecordFromChildIndex[sourceChildIndex];
// Check if this Container property is represented in style
int mapIndex = triggerSourceRecordMap.Search(dp.GlobalIndex);
if (mapIndex >= 0)
{
// Container's property is represented in style
TriggerSourceRecord record = triggerSourceRecordMap.Entries[mapIndex].Value;
// Invalidate all Self/Child-Index/Property dependents
InvalidateDependents(ownerStyle, frameworkTemplate, container, dp,
ref record.ChildPropertyDependents, invalidateOnlyContainer);
}
}
///////////////////////////////////////////////////////////////////
// Find all TriggerActions that may need to execute in response to
// the property change.
object candidateTrigger = propertyTriggersWithActions[dp.GlobalIndex];
if( candidateTrigger != DependencyProperty.UnsetValue )
{
// One or more trigger objects need to be evaluated. The candidateTrigger
// object may be a single trigger or a collection of them.
TriggerBase triggerBase = candidateTrigger as TriggerBase;
if( triggerBase != null )
{
InvokePropertyTriggerActions( triggerBase, container, dp, changedArgs, sourceChildIndex,
ownerStyle, frameworkTemplate );
}
else
{
Debug.Assert(candidateTrigger is List<TriggerBase>, "Internal data structure error: The FrugalMap [Style/Template].PropertyTriggersWithActions " +
"is expected to hold a single TriggerBase or a List<T> of them. An object of type " +
candidateTrigger.GetType().ToString() + " is not expected. Where did this object come from?");
List<TriggerBase> triggerList = (List<TriggerBase>)candidateTrigger;
for( int i = 0; i < triggerList.Count; i++ )
{
InvokePropertyTriggerActions( triggerList[i], container, dp, changedArgs, sourceChildIndex,
ownerStyle, frameworkTemplate );
}
}
}
}
