From 9fdd72a767f806fefe751dfb6a7208cac2030399 Mon Sep 17 00:00:00 2001 From: vincents Date: Wed, 20 Feb 2008 16:04:51 +0000 Subject: + initial version of TReader.FindComponentClass, works with a simple LCL application git-svn-id: http://svn.freepascal.org/svn/fpc/branches/cleanroom@10369 3ad0048d-3df7-0310-abae-a5850022a9f2 --- rtl/objpas/classes/reader.inc | 44 ++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 43 insertions(+), 1 deletion(-) diff --git a/rtl/objpas/classes/reader.inc b/rtl/objpas/classes/reader.inc index 390111ece8..fc786a8a8a 100644 --- a/rtl/objpas/classes/reader.inc +++ b/rtl/objpas/classes/reader.inc @@ -1353,8 +1353,50 @@ begin end; function TReader.FindComponentClass(const AClassName: String): TComponentClass; + +var + PersistentClass: TPersistentClass; + UClassName: shortstring; + + procedure FindInFieldTable(RootComponent: TComponent); + var + FieldClassTable: PFieldClassTable; + Entry: TPersistentClass; + i: Integer; + begin + FieldClassTable := + PFieldTable((Pointer(RootComponent.ClassType)+vmtFieldTable)^)^.ClassTable; + if assigned(FieldClassTable) then begin + for i := 0 to FieldClassTable^.Count -1 do begin + Entry := FieldClassTable^.Entries[i]; + if (UpperCase(Entry.ClassName)=UClassName) and + (Entry.InheritsFrom(TComponent)) then begin + Result := TComponentClass(Entry); + Break; + end; + end; + end; + end; + begin - // Tainted + Result := nil; + UClassName:=UpperCase(AClassName); + FindInFieldTable(Root); + + if (Result=nil) and assigned(LookupRoot) and (LookupRoot<>Root) then + FindInFieldTable(LookupRoot); + + if (Result=nil) then begin + PersistentClass := GetClass(AClassName); + if PersistentClass.InheritsFrom(TComponent) then + Result := TComponentClass(PersistentClass); + end; + + if (Result=nil) and assigned(OnFindComponentClass) then + OnFindComponentClass(Self, AClassName, Result); + + if (Result=nil) or (not Result.InheritsFrom(TComponent)) then + raise EClassNotFound.CreateFmt(SClassNotFound, [AClassName]); end; -- cgit v1.2.1