internal static void OnVisualChildChanged(DependencyObject parent, DependencyObject child, bool isAdded)
{
EventHandler <VisualTreeChangeEventArgs> visualTreeChanged = VisualDiagnostics.s_visualTreeChanged;
if (visualTreeChanged != null && EnableHelper.IsVisualTreeChangeEnabled)
{
int index;
VisualTreeChangeType changeType;
if (isAdded)
{
index = VisualDiagnostics.GetChildIndex(parent, child);
changeType = VisualTreeChangeType.Add;
}
else
{
// We cannot reliably get correct child index for a removed child. We'll force it to be -1;
index = -1;
changeType = VisualTreeChangeType.Remove;
}
RaiseVisualTreeChangedEvent(
visualTreeChanged,
new VisualTreeChangeEventArgs(parent, child, index, changeType),
// see EnableHelper.IsChangePermitted
isPotentialOuterChange: (changeType == VisualTreeChangeType.Add && index == 0 && VisualTreeHelper.GetParent(parent) == null));
}
}
static ResourceDictionaryDiagnostics()
{
IsEnabled = VisualDiagnostics.IsEnabled &&
VisualDiagnostics.IsEnvironmentVariableSet(null, "ENABLE_XAML_DIAGNOSTICS_SOURCE_INFO");
// internal property, not visible to user
IgnorableProperties.Add(typeof(ResourceDictionary).GetProperty("DeferrableContent"));
}
// Calls critical method IsEnvironmentVariableSet, but doesn't expose data
static ResourceDictionaryDiagnostics()
{
IsEnabled = VisualDiagnostics.IsEnabled &&
VisualDiagnostics.IsEnvironmentVariableSet(null, XamlSourceInfoHelper.XamlSourceInfoEnvironmentVariable);
// internal property, not visible to user
IgnorableProperties.Add(typeof(ResourceDictionary).GetProperty("DeferrableContent"));
}
// this method is (also) called via private reflection from test code
private static void InitializeEnableXamlSourceInfo(string value)
{
if (VisualDiagnostics.IsEnabled &&
VisualDiagnostics.IsEnvironmentVariableSet(value, "ENABLE_XAML_DIAGNOSTICS_SOURCE_INFO") &&
InitializeXamlObjectEventArgs())
{
s_sourceInfoTable = new ConditionalWeakTable <object, XamlSourceInfo>();
}
else
{
s_sourceInfoTable = null;
}
}
// this method is (also) called via private reflection from test code
private static void InitializeEnableXamlSourceInfo(string value)
{
if (VisualDiagnostics.IsEnabled &&
VisualDiagnostics.IsEnvironmentVariableSet(value, XamlSourceInfoHelper.XamlSourceInfoEnvironmentVariable) &&
InitializeXamlObjectEventArgs())
{
s_sourceInfoTable = new ConditionalWeakTable <object, XamlSourceInfo>();
}
else
{
s_sourceInfoTable = null;
}
}
static BindingDiagnostics()
{
IsEnabled = VisualDiagnostics.IsEnabled && VisualDiagnostics.IsEnvironmentVariableSet(null, XamlSourceInfoHelper.XamlSourceInfoEnvironmentVariable);
if (IsEnabled)
{
// Listeners may miss the initial set of binding failures, so cache events until the first listener attaches.
// Normally there will only be one listener added soon after the process starts,
// and it will want to know about any binding failures that already happened.
s_pendingEvents = new List <BindingFailedEventArgs>();
s_pendingEventsLock = new object();
}
}
internal static void OnVisualChildChanged(DependencyObject parent, DependencyObject child, bool isAdded)
{
EventHandler <VisualTreeChangeEventArgs> visualTreeChanged = VisualDiagnostics.s_visualTreeChanged;
if (visualTreeChanged != null && VisualDiagnostics.IsVisualTreeChangeEnabled)
{
int index;
VisualTreeChangeType changeType;
if (isAdded)
{
index = VisualDiagnostics.GetChildIndex(parent, child);
changeType = VisualTreeChangeType.Add;
}
else
{
// We cannot reliably get correct child index for a removed child. We'll force it to be -1;
index = -1;
changeType = VisualTreeChangeType.Remove;
}
VisualTreeChangeEventArgs args = new VisualTreeChangeEventArgs(parent, child, index, changeType);
visualTreeChanged(null, args);
}
}
