public void GetItems(DkmVisualizedExpression visualizedExpression, DkmEvaluationResultEnumContext enumContext, int startIndex, int count, out DkmChildVisualizedExpression[] items)
{
if (count == 0)
{
items = new DkmChildVisualizedExpression[0];
return;
}
var rawContextData = enumContext.GetDataItem <RawEnumContextData>();
var rawContext = rawContextData != null ? rawContextData.RawContext : enumContext;
var result = new List <DkmChildVisualizedExpression>(count);
if (rawContextData != null && rawContextData.PythonView != null)
{
if (startIndex == 0)
{
result.Add(rawContextData.PythonView);
--count;
}
else
{
--startIndex;
}
}
DkmEvaluationResult[] rawItems;
visualizedExpression.GetItemsCallback(rawContext, startIndex, count, out rawItems);
for (int i = 0; i < rawItems.Length; ++i)
{
var rawItem = rawItems[i];
var rawSuccessItem = rawItem as DkmSuccessEvaluationResult;
DkmExpressionValueHome home = null;
if (rawSuccessItem != null && rawSuccessItem.Address != null)
{
home = DkmPointerValueHome.Create(rawSuccessItem.Address.Value);
}
else
{
home = DkmFakeValueHome.Create(0);
}
var item = DkmChildVisualizedExpression.Create(
visualizedExpression.InspectionContext,
visualizedExpression.VisualizerId,
visualizedExpression.SourceId,
visualizedExpression.StackFrame,
home,
rawItem,
visualizedExpression,
(uint)(startIndex + i),
rawItem.GetDataItem <RawEvaluationResultHolder>());
result.Add(item);
}
items = result.ToArray();
}
public override void GetChildItems(DkmEvaluationResultEnumContext enumContext, int start, int count, out DkmChildVisualizedExpression[] items)
{
var props = GetAllProperties();
int total_num_props = props.Length;
int end_idx = Math.Min(start + count, total_num_props);
int num_to_return = end_idx - start;
items = new DkmChildVisualizedExpression[num_to_return];
for (int idx = start, out_idx = 0; idx < end_idx; ++idx, ++out_idx)
{
// We want to construct our own visualized expression from the eval.
var eval = props[idx] as DkmSuccessEvaluationResult;
// @TODO: Perhaps allow for failed evaluations and display anyway with unknown value??
Debug.Assert(eval != null);
DkmExpressionValueHome home;
if (eval.Address != null)
{
home = DkmPointerValueHome.Create(eval.Address.Value);
}
else
{
home = DkmFakeValueHome.Create(0);
}
var expr = DkmChildVisualizedExpression.Create(
expression_.InspectionContext,
// @TODO: This is weird... seems to affect whether we get callback.
// Obviously the properties can be of any type, UObject or not.
// Perhaps best to put back the guid for PropertyValue, even though we don't really need to use it.
Guids.Visualizer.PropertyValue, //Guids.Visualizer.UObject,//Guids.Visualizer.PropertyList,
// Seems that in order for these to be passed back to the EE for default expansion, they need to be given
// the SourceId from the originally received root expression.
PropListExpression.Parent.SourceId,
expression_.StackFrame,
home,
eval,
expression_,
(uint)idx,
null // Don't associate any data with the expression. If the EE calls back to us to expand it, we'll just tell it to use default expansion.
);
items[out_idx] = expr;
}
}
public void EvaluateChildren(DkmChildVisualizedExpression[] output, int startIndex, out int numWritten)
{
numWritten = 0;
if (mode_ == ChildDisplayMode.Inline)
{
CreateDefaultEnumContext();
int count = ChildCount;
DkmEvaluationResult[] results = new DkmEvaluationResult[count];
expression_.GetItemsCallback(defEnumContext_, 0, count, out results);
for (int i = 0; i < count; ++i)
{
DkmSuccessEvaluationResult successResult = results[i] as DkmSuccessEvaluationResult;
DkmExpressionValueHome home = null;
if (successResult != null && successResult.Address != null)
{
home = DkmPointerValueHome.Create(successResult.Address.Value);
}
else
{
home = DkmFakeValueHome.Create(0);
}
output[startIndex + i] = DkmChildVisualizedExpression.Create(
defEnumContext_.InspectionContext,
Guids.CustomVisualizer.ForceDefault,
expression_.SourceId,
defEnumContext_.StackFrame,
home,
results[i],
expression_,
(uint)startIndex,
null);
EvaluationDataItem originalDataItem = results[i].GetDataItem <EvaluationDataItem>();
}
numWritten = count;
}
else
{
numWritten = 1;
}
}
/* public override DkmChildVisualizedExpression GetMostDerived()
* {
* foreach (var child in MemberExpressions)
* {
* var eval = child.Value.EvaluationResult as DkmSuccessEvaluationResult;
* if (eval != null && eval.Category == DkmEvaluationResultCategory.MostDerivedClass)
* {
* return child.Value;
* }
* }
*
* return null;
* }
*/
private DkmChildVisualizedExpression CreateNewExpression(string expr_str)
{
DkmSuccessEvaluationResult result_eval = null;
try
{
result_eval = DefaultEE.DefaultEval(expr_str, callback_expr_, true) as DkmSuccessEvaluationResult;
}
catch (Exception e)
{ }
if (result_eval == null)
{
return(null);
}
DkmExpressionValueHome home;
if (result_eval.Address != null)
{
home = DkmPointerValueHome.Create(result_eval.Address.Value);
}
else
{
home = DkmFakeValueHome.Create(0);
}
// @TODO: This is weird. Can I perhaps construct a DkmRootVisualizedExpression instead??
// Not sure about a couple of the parameters needed to do so, Module especially...
return(DkmChildVisualizedExpression.Create(
result_eval.InspectionContext,
expr_.VisualizerId,
expr_.SourceId,
result_eval.StackFrame,
home,
result_eval,
callback_expr_, //expr_,
0, // ??
null
));
}
/// <summary>
/// Returns child elements of previous evaluation.
/// </summary>
public void GetItems(DkmVisualizedExpression visualizedExpression, DkmEvaluationResultEnumContext enumContext, int startIndex, int count, out DkmChildVisualizedExpression[] items)
{
// Check if we want to use passthrough visualizer
PassThroughVisualizer passThroughVisualizer = enumContext.GetDataItem <PassThroughVisualizer>();
if (passThroughVisualizer != null)
{
passThroughVisualizer.GetItems(visualizedExpression, enumContext, startIndex, count, out items);
return;
}
// Execute our regular visualizer
VSCustomVisualizerEvaluator evaluator = visualizedExpression.GetDataItem <VSCustomVisualizerEvaluator>();
IResultVisualizer[] itemsAsResults = evaluator.ResultVisualizer.Children.Skip(startIndex).Take(count).ToArray();
items = new DkmChildVisualizedExpression[itemsAsResults.Length];
for (int i = 0; i < items.Length; i++)
{
IResultVisualizer item = itemsAsResults[i];
DkmEvaluationResultCategory category;
switch (item.DataType)
{
case CompletionDataType.Class:
category = DkmEvaluationResultCategory.Class;
break;
case CompletionDataType.Property:
case CompletionDataType.StaticProperty:
category = DkmEvaluationResultCategory.Property;
break;
case CompletionDataType.Event:
category = DkmEvaluationResultCategory.Event;
break;
case CompletionDataType.Method:
category = DkmEvaluationResultCategory.Method;
break;
case CompletionDataType.Enum:
case CompletionDataType.EnumValue:
case CompletionDataType.Keyword:
case CompletionDataType.Namespace:
case CompletionDataType.StaticClass:
case CompletionDataType.StaticEvent:
case CompletionDataType.StaticMethod:
case CompletionDataType.StaticVariable:
case CompletionDataType.Unknown:
case CompletionDataType.Variable:
default:
category = DkmEvaluationResultCategory.Data;
break;
}
DkmExpressionValueHome valueHome = visualizedExpression.ValueHome;
ulong address = 0;
string fullName = string.Empty;
string typeName = null;
try
{
if (item.Value is Variable variable)
{
address = variable.GetPointerAddress();
typeName = variable.GetCodeType().Name;
fullName = $"*(({typeName}*)0x{address:X})";
valueHome = DkmPointerValueHome.Create(address);
}
}
catch
{
}
DkmEvaluationResult result;
DkmDataItem dataItem = null;
if (item.ShouldForceDefaultVisualizer && !string.IsNullOrEmpty(fullName))
{
using (DkmLanguageExpression languageExpression = DkmLanguageExpression.Create(visualizedExpression.InspectionContext.Language, DkmEvaluationFlags.TreatAsExpression, fullName, null))
{
visualizedExpression.EvaluateExpressionCallback(visualizedExpression.InspectionContext, languageExpression, visualizedExpression.StackFrame, out result);
}
if (result is DkmSuccessEvaluationResult successResult)
{
dataItem = new PassThroughVisualizer(successResult);
result = DkmSuccessEvaluationResult.Create(
successResult.InspectionContext,
successResult.StackFrame,
item.Name, // Name - Left column
successResult.FullName,
successResult.Flags,
successResult.Value, // Value - Middle column
successResult.EditableValue,
successResult.Type, // Type - Right column
category,
successResult.Access,
successResult.StorageType,
successResult.TypeModifierFlags,
successResult.Address,
successResult.CustomUIVisualizers,
successResult.ExternalModules,
successResult.RefreshButtonText,
dataItem);
}
}
else
{
result = DkmSuccessEvaluationResult.Create(
visualizedExpression.InspectionContext,
visualizedExpression.StackFrame,
item.Name, // Name - Left column
fullName, // FullName - What is being copied when "Add to watch"
DkmEvaluationResultFlags.ReadOnly | (item.IsExpandable ? DkmEvaluationResultFlags.Expandable : DkmEvaluationResultFlags.None),
item.ValueString, // Value - Middle column
"",
item.Type ?? "", // Type - Right column
category,
DkmEvaluationResultAccessType.None,
DkmEvaluationResultStorageType.None,
DkmEvaluationResultTypeModifierFlags.None,
null,
VSUIVisualizerService.GetUIVisualizers(item),
null,
null);
dataItem = new VSCustomVisualizerEvaluator(result, item);
}
items[i] = DkmChildVisualizedExpression.Create(
visualizedExpression.InspectionContext,
visualizedExpression.VisualizerId,
visualizedExpression.SourceId,
visualizedExpression.StackFrame,
valueHome,
result,
visualizedExpression,
(uint)(startIndex + i),
dataItem);
}
}
/* public override DkmChildVisualizedExpression GetMostDerived()
* {
* foreach (var child in MemberExpressions)
* {
* var eval = child.Value.EvaluationResult as DkmSuccessEvaluationResult;
* if (eval != null && eval.Category == DkmEvaluationResultCategory.MostDerivedClass)
* {
* return child.Value;
* }
* }
*
* return null;
* }
*/
private void EvaluateChildren()
{
MemberExpressions = new Dictionary <string, DkmChildVisualizedExpression>();
// @TODO: Am assuming that if expr_ is a child expression, it would be more
// efficient to use its EvaluationResult property instead of invoking the default
// evaluator again. However, doing this results in using child UObject expressions which
// have been generated using the custom visualization (since ! specifier is not recursive).
// We really don't want this since we just want the default expansion so we can navigate
// through the members and bases of the class.
// Problem is, don't know how to communicate to the 'UseDefaultEvaluationBehavior'
// implementation to use a default expansion in this particular case. Setting the data
// item on expr_ before calling GetItemsCallback doesn't work, since the expression that
// gets passed through is not actually expr_, but a root visualized expression that was
// created by the EE when visualizing the parent, which we don't have access to.
// As it is, now that we inline the default expansion alongside the addition of the
// 'UE4 Properties' child, this does seem to work. However, not obvious there is any
// performance improvement, also not 100% sure it's safe to use the stored evaluation.
DkmEvaluationResult uobj_eval = null;
if (expr_.TagValue == DkmVisualizedExpression.Tag.ChildVisualizedExpression)
{
uobj_eval = ((DkmChildVisualizedExpression)expr_).EvaluationResult;
}
else
{
uobj_eval = DefaultEE.DefaultEval(callback_expr_, true);
}
eval_ = (DkmSuccessEvaluationResult)uobj_eval;
DkmEvaluationResult[] children;
DkmEvaluationResultEnumContext enum_context;
try
{
callback_expr_.GetChildrenCallback(uobj_eval, 0, callback_expr_.InspectionContext, out children, out enum_context);
// @NOTE: Assuming count will not be large here!!
callback_expr_.GetItemsCallback(enum_context, 0, enum_context.Count, out children);
}
catch
{
return;
}
uint idx = 0;
foreach (var child_eval in children)
{
if (child_eval.TagValue == DkmEvaluationResult.Tag.SuccessResult)
{
var success_eval = child_eval as DkmSuccessEvaluationResult;
Debug.Assert(success_eval != null);
DkmExpressionValueHome home;
if (success_eval.Address != null)
{
home = DkmPointerValueHome.Create(success_eval.Address.Value);
}
else
{
home = DkmFakeValueHome.Create(0);
}
DkmChildVisualizedExpression child = DkmChildVisualizedExpression.Create(
child_eval.InspectionContext,
callback_expr_.VisualizerId,
callback_expr_.SourceId,
child_eval.StackFrame,
home,
child_eval,
expr_,
idx,
null
);
MemberExpressions[child_eval.Name] = child;
}
++idx;
}
}
public override void GetChildItems(DkmEvaluationResultEnumContext enumContext, int start, int count, out DkmChildVisualizedExpression[] items)
{
// Cap the requested number to the total remaining from startIndex
count = Math.Min(count, enumContext.Count - start);
items = new DkmChildVisualizedExpression[count];
uint idx = 0;
// Retrieve the default expansion enum context
var default_data = enumContext.GetDataItem <DefaultEnumContextDataItem>();
if (start < default_data.Context.Count)
{
// Requesting default children
int default_count = Math.Min(count, default_data.Context.Count - start);
DkmEvaluationResult[] default_evals;
expression_.GetItemsCallback(default_data.Context, start, default_count, out default_evals);
for (int dft_idx = 0; dft_idx < default_count; ++dft_idx, ++idx)
{
DkmSuccessEvaluationResult success_eval = default_evals[dft_idx] as DkmSuccessEvaluationResult;
DkmExpressionValueHome home = null;
if (success_eval != null && success_eval.Address != null)
{
home = DkmPointerValueHome.Create(success_eval.Address.Value);
}
else
{
home = DkmFakeValueHome.Create(0);
}
items[idx] = DkmChildVisualizedExpression.Create(
enumContext.InspectionContext,
expression_.VisualizerId, // @TODO: Check this is what we want. Will we get callbacks for it, regardless of its type?
expression_.SourceId,
enumContext.StackFrame,
home,
default_evals[dft_idx],
expression_,
(uint)start,
null
);
}
}
if (start + count > default_data.Context.Count)
{
// Requesting custom children
// @NOTE: Currently just assuming only 1 custom child (prop list) and hard coding as such.
// DkmSuccessEvaluationResult.ExtractFromProperty(IDebugProperty3!!!!!!!) ...............................................
// @NOTE: Had thought could just create an expression with a null evaluation
// inside it, and by giving it a visualizer guid, the system would call back
// to us to evaluate the expression. Seems not to work though, I guess because the
// visualizer guid identifies the visualizer but not the containing component,
// and since the expression itself doesn't have a type, it can't know that it
// should call our component.
DkmEvaluationResult eval = DkmSuccessEvaluationResult.Create(
enumContext.InspectionContext,
enumContext.StackFrame,
Resources.UE4PropVis.IDS_DISP_BLUEPRINTPROPERTIES,
Resources.UE4PropVis.IDS_DISP_BLUEPRINTPROPERTIES,
DkmEvaluationResultFlags.ReadOnly | DkmEvaluationResultFlags.Expandable,
"", // @TODO: something like "[<count> properties]"
null,
"", // Type column
DkmEvaluationResultCategory.Other,
DkmEvaluationResultAccessType.None,
DkmEvaluationResultStorageType.None,
DkmEvaluationResultTypeModifierFlags.None,
null,
null,
null,
null
);
// This child is just for organization and does not correspond to anything in memory.
DkmExpressionValueHome valueHome = DkmFakeValueHome.Create(0);
var prop_list_expr = DkmChildVisualizedExpression.Create(
enumContext.InspectionContext,
Guids.Visualizer.PropertyList,
// Associate the expression with ourselves, since we created it
Guids.Component.VisualizerComponent,
enumContext.StackFrame,
valueHome,
eval,
expression_,
idx,
null
);
// Create a visualizer for the property list, and attach it to the expression.
var prop_list_visualizer = new PropertyListVisualizer(prop_list_expr, access_ctx_);
prop_list_expr.SetDataItem(DkmDataCreationDisposition.CreateAlways, new ExpressionDataItem(prop_list_visualizer));
items[idx] = prop_list_expr;
}
}