/// <summary>
/// Explores given variable initializer using C# lookuper
/// </summary>
protected virtual void Explore(AbstractBatchCommand parentCommand, CodeVariable2 codeVariable, CodeNamespace parentNamespace, CodeElement2 codeClassOrStruct, Predicate <CodeElement> exploreable, bool isLocalizableFalse)
{
if (codeVariable.InitExpression == null)
{
return; // variable must have an initializer
}
if (codeClassOrStruct.Kind == vsCMElement.vsCMElementStruct && !codeVariable.IsShared)
{
return; // instance variable of structs cannot have initializers
}
if (!exploreable(codeVariable as CodeElement))
{
return; // predicate must evaluate to true
}
string initExpression = codeVariable.GetText(); // get text of initializer
if (string.IsNullOrEmpty(initExpression))
{
return;
}
TextPoint startPoint = codeVariable.StartPoint;
// is variable decorated with Localizable(false)
bool variableLocalizableFalse = (codeVariable as CodeElement).HasLocalizableFalseAttribute();
// run lookuper using parent command
var list = parentCommand.LookupInCSharp(initExpression, startPoint, parentNamespace, codeClassOrStruct, null, codeVariable.Name, isLocalizableFalse || variableLocalizableFalse);
// add context to result items (surounding few lines of code)
EditPoint2 editPoint = (EditPoint2)startPoint.CreateEditPoint();
foreach (AbstractResultItem item in list)
{
item.IsConst = codeVariable.ConstKind == vsCMConstKind.vsCMConstKindConst;
item.CodeModelSource = codeVariable;
AddContextToItem(item, editPoint);
}
}
/// <summary>
/// Used by C# ad-hoc methods (move and inline) to get information about the block of code, where right-click was performed.
/// This methods makes use of document's FileCodeModel, which is not available for ASP .NET files - these files are thus
/// handled by their own parser.
/// </summary>
/// <param name="text">Text of the block (e.g. code of a method, declaration of a variable...)</param>
/// <param name="startPoint">Beginning of the text</param>
/// <param name="codeFunctionName">Name of the function, where right-click was performed, null if right-click was performed on a variable.</param>
/// <param name="codeVariableName">Name of the variable, where right-click was performed, null otherwise.</param>
/// <param name="codeClass">Name of the class, where the code block is located.</param>
/// <param name="selectionSpan">Current selection span.</param>
/// <returns>True, if all necessary information was succesfully obtained, false otherwise.</returns>
protected bool GetCodeBlockFromSelection(out string text, out TextPoint startPoint, out string codeFunctionName, out string codeVariableName, out CodeElement2 codeClass, out TextSpan selectionSpan, out bool isConst, out object codeModelSource)
{
// get current selection span
TextSpan[] spans = new TextSpan[1];
int hr = textView.GetSelectionSpan(spans);
Marshal.ThrowExceptionForHR(hr);
selectionSpan = spans[0];
object o;
hr = textLines.CreateTextPoint(selectionSpan.iStartLine, selectionSpan.iStartIndex, out o);
Marshal.ThrowExceptionForHR(hr);
TextPoint selectionPoint = (TextPoint)o;
startPoint = null;
text = null;
bool ok = false;
codeFunctionName = null;
codeVariableName = null;
codeClass = null;
isConst = false;
codeModelSource = null;
// It is impossible to find out the code block, where right-click was performed. Following code
// assumes that valid string literals or references can only be found in a method, in a class variable (as initializers)
// or in a property code. C# syntax permits more locations (attributes, default argument values in .NET 4+) but we can ignore
// these, because they are all evaluated at compile-time, making resource references impossible.
// assume we are in a function (method)
try {
CodeFunction2 codeFunction = (CodeFunction2)currentCodeModel.CodeElementFromPoint(selectionPoint, vsCMElement.vsCMElementFunction);
codeFunctionName = codeFunction.Name;
codeClass = codeFunction.GetClass(); // extension
codeModelSource = codeFunction;
text = codeFunction.GetText();
if (!string.IsNullOrEmpty(text))
{
startPoint = codeFunction.GetStartPoint(vsCMPart.vsCMPartBody);
ok = true;
}
} catch (Exception) {
// it's not a method - maybe a property?
try {
CodeProperty codeProperty = (CodeProperty)currentCodeModel.CodeElementFromPoint(selectionPoint, vsCMElement.vsCMElementProperty);
codeFunctionName = codeProperty.Name;
codeClass = codeProperty.GetClass();
codeModelSource = codeProperty;
text = codeProperty.GetText();
if (!string.IsNullOrEmpty(text))
{
startPoint = codeProperty.GetStartPoint(vsCMPart.vsCMPartBody);
ok = true;
}
} catch (Exception) {
// not a property, either. It must be a variable - or there's no valid code block
try {
CodeVariable2 codeVariable = (CodeVariable2)currentCodeModel.CodeElementFromPoint(selectionPoint, vsCMElement.vsCMElementVariable);
if (codeVariable.InitExpression != null)
{
codeVariableName = codeVariable.Name;
codeClass = codeVariable.GetClass();
isConst = codeVariable.ConstKind == vsCMConstKind.vsCMConstKindConst;
codeModelSource = codeVariable;
startPoint = codeVariable.StartPoint;
text = codeVariable.GetText();
if ((codeClass.Kind == vsCMElement.vsCMElementStruct && codeVariable.IsShared) ||
(codeClass.Kind == vsCMElement.vsCMElementClass || codeClass.Kind == vsCMElement.vsCMElementModule) &&
!string.IsNullOrEmpty(text))
{
ok = true;
}
}
} catch (Exception) {
return(false);
}
}
}
return(ok);
}