implemented context help for OI properties

git-svn-id: trunk@8916 -

components/codetools/codetoolmanager.pas

@@ -306,13 +306,20 @@ type
           out NewX, NewY, NewTopLine: integer): boolean;
     function FindSmartHint(Code: TCodeBuffer; X,Y: integer): string;
     function FindDeclarationInInterface(Code: TCodeBuffer;
-          const Identifier: string; var NewCode: TCodeBuffer;
-          var NewX, NewY, NewTopLine: integer): boolean;
+          const Identifier: string; out NewCode: TCodeBuffer;
+          out NewX, NewY, NewTopLine: integer): boolean;
+    function FindDeclarationWithMainUsesSection(Code: TCodeBuffer;
+          const Identifier: string;
+          out NewCode: TCodeBuffer;
+          out NewX, NewY, NewTopLine: integer): Boolean;
     function FindDeclarationAndOverload(Code: TCodeBuffer; X,Y: integer;
           var ListOfPCodeXYPosition: TFPList): boolean;
     function FindMainDeclaration(Code: TCodeBuffer; X,Y: integer;
-          var NewCode: TCodeBuffer;
-          var NewX, NewY, NewTopLine: integer): boolean;
+          out NewCode: TCodeBuffer;
+          out NewX, NewY, NewTopLine: integer): boolean;
+    function FindDeclarationOfPropertyPath(Code: TCodeBuffer;
+          const PropertyPath: string; out NewCode: TCodeBuffer;
+          out NewX, NewY, NewTopLine: integer): Boolean;
 
     // get code context
     function FindCodeContext(Code: TCodeBuffer; X,Y: integer;
@@ -419,6 +426,8 @@ type
           var FoundInUnits, MissingInUnits, NormalUnits: TStrings): boolean;
     function CommentUnitsInUsesSections(Code: TCodeBuffer;
           MissingUnits: TStrings): boolean;
+    function FindUnit(Code: TCodeBuffer;
+                      var AnUnitName, AnUnitInFilename: string): string;
 
     // resources
     property OnFindDefinePropertyForContext: TOnFindDefinePropertyForContext
@@ -1422,7 +1431,7 @@ begin
 end;
 
 function TCodeToolManager.FindDeclarationInInterface(Code: TCodeBuffer;
-  const Identifier: string; var NewCode: TCodeBuffer; var NewX, NewY,
+  const Identifier: string; out NewCode: TCodeBuffer; out NewX, NewY,
   NewTopLine: integer): boolean;
 var
   NewPos: TCodeXYPosition;
@@ -1451,6 +1460,33 @@ begin
   {$ENDIF}
 end;
 
+function TCodeToolManager.FindDeclarationWithMainUsesSection(Code: TCodeBuffer;
+  const Identifier: string; out NewCode: TCodeBuffer;
+  out NewX, NewY, NewTopLine: integer): Boolean;
+var
+  NewPos: TCodeXYPosition;
+begin
+  Result:=false;
+  {$IFDEF CTDEBUG}
+  DebugLn('TCodeToolManager.FindDeclarationWithMainUsesSection A ',Code.Filename,' Identifier=',Identifier);
+  {$ENDIF}
+  if not InitCurCodeTool(Code) then exit;
+  try
+    Result:=FCurCodeTool.FindDeclarationWithMainUsesSection(Identifier,NewPos,
+                                                            NewTopLine);
+    if Result then begin
+      NewX:=NewPos.X;
+      NewY:=NewPos.Y;
+      NewCode:=NewPos.Code;
+    end;
+  except
+    on e: Exception do HandleException(e);
+  end;
+  {$IFDEF CTDEBUG}
+  DebugLn('TCodeToolManager.FindDeclarationInInterface END ');
+  {$ENDIF}
+end;
+
 function TCodeToolManager.FindDeclarationAndOverload(Code: TCodeBuffer; X,
   Y: integer; var ListOfPCodeXYPosition: TFPList): boolean;
 var
@@ -1479,7 +1515,7 @@ begin
 end;
 
 function TCodeToolManager.FindMainDeclaration(Code: TCodeBuffer; X, Y: integer;
-  var NewCode: TCodeBuffer; var NewX, NewY, NewTopLine: integer): boolean;
+  out NewCode: TCodeBuffer; out NewX, NewY, NewTopLine: integer): boolean;
 var
   CursorPos: TCodeXYPosition;
   NewPos: TCodeXYPosition;
@@ -1507,6 +1543,33 @@ begin
   {$ENDIF}
 end;
 
+function TCodeToolManager.FindDeclarationOfPropertyPath(Code: TCodeBuffer;
+  const PropertyPath: string; out NewCode: TCodeBuffer; out NewX, NewY,
+  NewTopLine: integer): Boolean;
+var
+  NewPos: TCodeXYPosition;
+begin
+  Result:=false;
+  {$IFDEF CTDEBUG}
+  DebugLn('TCodeToolManager.FindDeclarationOfPropertyPath A ',Code.Filename,' Path="',PropertyPath,'"');
+  {$ENDIF}
+  if not InitCurCodeTool(Code) then exit;
+  try
+    Result:=FCurCodeTool.FindDeclarationOfPropertyPath(PropertyPath,
+                                                       NewPos,NewTopLine);
+    if Result then begin
+      NewX:=NewPos.X;
+      NewY:=NewPos.Y;
+      NewCode:=NewPos.Code;
+    end;
+  except
+    on e: Exception do Result:=HandleException(e);
+  end;
+  {$IFDEF CTDEBUG}
+  DebugLn('TCodeToolManager.FindDeclarationOfPropertyPath END ');
+  {$ENDIF}
+end;
+
 function TCodeToolManager.FindCodeContext(Code: TCodeBuffer; X, Y: integer; out
   CodeContexts: TCodeContextInfo): boolean;
 var
@@ -1632,6 +1695,7 @@ begin
     DebugLn('TCodeToolManager.FindReferences unable to FindMainDeclaration ',IdentifierCode.Filename,' x=',dbgs(x),' y=',dbgs(y));
     exit;
   end;
+  if NewTopLine=0 then ;
   if not InitCurCodeTool(TargetCode) then exit;
   CursorPos.X:=NewX;
   CursorPos.Y:=NewY;
@@ -2744,6 +2808,21 @@ begin
   end;
 end;
 
+function TCodeToolManager.FindUnit(Code: TCodeBuffer; var AnUnitName,
+  AnUnitInFilename: string): string;
+begin
+  Result:='';
+  {$IFDEF CTDEBUG}
+  DebugLn('TCodeToolManager.FindUnit A ',Code.Filename,' TheUnitName="',TheUnitName,'"');
+  {$ENDIF}
+  if not InitCurCodeTool(Code) then exit;
+  try
+    Result:=FCurCodeTool.FindUnitCaseInsensitive(AnUnitName,AnUnitInFilename);
+  except
+    on e: Exception do HandleException(e);
+  end;
+end;
+
 function TCodeToolManager.FindLFMFileName(Code: TCodeBuffer): string;
 var LinkIndex: integer;
   CurCode: TCodeBuffer;

components/codetools/finddeclarationtool.pas

@@ -682,16 +682,29 @@ type
       var NewPos: TCodeXYPosition; var NewTopLine: integer): boolean;
     function FindDeclarationInInterface(const Identifier: string;
       var NewPos: TCodeXYPosition; var NewTopLine: integer): boolean;
+    function FindDeclarationWithMainUsesSection(const Identifier: string;
+      var NewPos: TCodeXYPosition; var NewTopLine: integer): boolean;
+    function FindDeclarationOfPropertyPath(const PropertyPath: string;
+      var NewPos: TCodeXYPosition; var NewTopLine: integer): boolean;
+    function FindDeclarationNodeInInterface(const Identifier: string;
+      BuildTheTree: Boolean): TCodeTreeNode;
+
+    function FindMainUsesSection: TCodeTreeNode;
+    function FindImplementationUsesSection: TCodeTreeNode;
+
     function FindUnitSource(const AnUnitName,
       AnUnitInFilename: string; ExceptionOnNotFound: boolean): TCodeBuffer;
     function FindUnitCaseInsensitive(var AnUnitName,
                                      AnUnitInFilename: string): string;
     procedure GatherUnitAndSrcPath(var UnitPath, SrcPath: string);
     function SearchUnitInUnitLinks(const TheUnitName: string): string;
+    
     function FindSmartHint(const CursorPos: TCodeXYPosition): string;
+    
     function BaseTypeOfNodeHasSubIdents(ANode: TCodeTreeNode): boolean;
     function FindBaseTypeOfNode(Params: TFindDeclarationParams;
       Node: TCodeTreeNode): TFindContext;
+      
     function FindDeclarationAndOverload(const CursorPos: TCodeXYPosition;
       out ListOfPCodeXYPosition: TFPList): boolean;
     function FindClassAndAncestors(ClassNode: TCodeTreeNode;
@@ -700,6 +713,7 @@ type
       var ListOfPFindContext: TFPList): boolean;
     function FindReferences(const CursorPos: TCodeXYPosition;
       SkipComments: boolean; out ListOfPCodeXYPosition: TFPList): boolean;
+      
     function CleanPosIsDeclarationIdentifier(CleanPos: integer;
                                  Node: TCodeTreeNode): boolean;
     function FindCodeContext(const CursorPos: TCodeXYPosition;
@@ -715,17 +729,17 @@ type
     function NodeIsForwardDeclaration(Node: TCodeTreeNode): boolean;
 
     property InterfaceIdentifierCache: TInterfaceIdentifierCache
-      read FInterfaceIdentifierCache;
+                                                 read FInterfaceIdentifierCache;
     property OnGetUnitSourceSearchPath: TOnGetSearchPath
-      read FOnGetUnitSourceSearchPath write FOnGetUnitSourceSearchPath;
+               read FOnGetUnitSourceSearchPath write FOnGetUnitSourceSearchPath;
     property OnFindUsedUnit: TOnFindUsedUnit
-      read FOnFindUsedUnit write FOnFindUsedUnit;
+                                     read FOnFindUsedUnit write FOnFindUsedUnit;
     property OnGetSrcPathForCompiledUnit: TOnGetSrcPathForCompiledUnit
-      read FOnGetSrcPathForCompiledUnit write FOnGetSrcPathForCompiledUnit;
+           read FOnGetSrcPathForCompiledUnit write FOnGetSrcPathForCompiledUnit;
     property OnGetCodeToolForBuffer: TOnGetCodeToolForBuffer
-      read FOnGetCodeToolForBuffer write FOnGetCodeToolForBuffer;
+                     read FOnGetCodeToolForBuffer write FOnGetCodeToolForBuffer;
     property AdjustTopLineDueToComment: boolean
-        read FAdjustTopLineDueToComment write FAdjustTopLineDueToComment;
+               read FAdjustTopLineDueToComment write FAdjustTopLineDueToComment;
   end;
 
 function ExprTypeToString(const ExprType: TExpressionType): string;
@@ -1307,6 +1321,123 @@ end;
 function TFindDeclarationTool.FindDeclarationInInterface(
   const Identifier: string; var NewPos: TCodeXYPosition; var NewTopLine: integer
   ): boolean;
+var
+  Node: TCodeTreeNode;
+begin
+  Result:=false;
+  if Identifier='' then exit;
+  Node:=FindDeclarationNodeInInterface(Identifier,true);
+  if Node<>nil then
+    Result:=JumpToNode(Node,NewPos,NewTopLine,false);
+end;
+
+function TFindDeclarationTool.FindDeclarationWithMainUsesSection(
+  const Identifier: string; var NewPos: TCodeXYPosition; var NewTopLine: integer
+  ): boolean;
+var
+  UsesNode: TCodeTreeNode;
+  Params: TFindDeclarationParams;
+begin
+  Result:=false;
+  if Identifier='' then exit;
+  BuildTree(false);
+  UsesNode:=FindMainUsesSection;
+  if UsesNode=nil then exit;
+
+  Params:=TFindDeclarationParams.Create;
+  try
+    Params.Flags:=[fdfExceptionOnNotFound];
+    Params.SetIdentifier(Self,PChar(Identifier),nil);
+    if FindIdentifierInUsesSection(UsesNode,Params) then begin
+      if Params.NewNode=nil then exit;
+      Result:=Params.NewCodeTool.JumpToNode(Params.NewNode,NewPos,
+                                            NewTopLine,false);
+    end;
+  finally
+    Params.Free;
+  end;
+end;
+
+function TFindDeclarationTool.FindDeclarationOfPropertyPath(
+  const PropertyPath: string; var NewPos: TCodeXYPosition;
+  var NewTopLine: integer): boolean;
+// example: PropertyPath='TForm1.Font.Color'
+var
+  StartPos: Integer;
+
+  function GetNextIdentifier: string;
+  var
+    EndPos: LongInt;
+  begin
+    EndPos:=StartPos;
+    while (EndPos<=length(PropertyPath)) and (IsIdentChar[PropertyPath[EndPos]])
+    do inc(EndPos);
+    if (EndPos<=length(PropertyPath)) and (PropertyPath[EndPos]<>'.') then
+      Result:=''
+    else begin
+      Result:=copy(PropertyPath,StartPos,EndPos-StartPos);
+      StartPos:=EndPos+1;
+    end;
+  end;
+  
+var
+  Params: TFindDeclarationParams;
+  Identifier: String;
+  IsLastProperty: Boolean;
+  Context: TFindContext;
+begin
+  Result:=false;
+  //DebugLn('TFindDeclarationTool.FindDeclarationOfPropertyPath PropertyPath="',PropertyPath,'"');
+  if PropertyPath='' then exit;
+  BuildTree(false);
+
+  // first search the class in the interface
+  StartPos:=1;
+  Identifier:=GetNextIdentifier;
+  if Identifier='' then exit;
+  Context.Tool:=Self;
+  Context.Node:=FindDeclarationNodeInInterface(Identifier,true);
+  if Context.Node=nil then exit;
+  Context.Node:=FindTypeNodeOfDefinition(Context.Node);
+  if Context.Node=nil then exit;
+  Params:=TFindDeclarationParams.Create;
+  try
+    // then search the properties
+    repeat
+      //DebugLn('TFindDeclarationTool.FindDeclarationOfPropertyPath ',Context.Node.DescAsString);
+      if (not (Context.Node.Desc in [ctnClass,ctnClassInterface,ctnRecordType]))
+      then
+        exit;
+      Params.Flags:=[fdfExceptionOnNotFound,fdfSearchInAncestors];
+      Identifier:=GetNextIdentifier;
+      //DebugLn('TFindDeclarationTool.FindDeclarationOfPropertyPath Identifier="',identifier,'"');
+      if Identifier='' then exit;
+      Params.SetIdentifier(Self,PChar(Identifier),nil);
+      Params.ContextNode:=Context.Node;
+      IsLastProperty:=StartPos>length(PropertyPath);
+      if IsLastProperty then
+        Params.Flags:=Params.Flags+[fdfFindVariable]
+      else
+        Params.Flags:=Params.Flags-[fdfFindVariable]+[fdfFunctionResult];
+      if not Context.Tool.FindIdentifierInContext(Params) then exit;
+      Context.Tool:=Params.NewCodeTool;
+      Context.Node:=Params.NewNode;
+      if Context.Node=nil then exit;
+      if IsLastProperty then begin
+        Result:=Context.Tool.JumpToNode(Context.Node,NewPos,NewTopLine,false);
+        break;
+      end else begin
+        Context:=Context.Tool.FindBaseTypeOfNode(Params,Context.Node);
+        if Context.Node=nil then exit;
+      end;
+     until false;
+  finally
+    Params.Free;
+  end;
+end;
+
+function TFindDeclarationTool.FindDeclarationNodeInInterface(
+  const Identifier: string; BuildTheTree: Boolean): TCodeTreeNode;
 var
   StartNode: TCodeTreeNode;
   SectionNode: TCodeTreeNode;
@@ -1315,10 +1446,14 @@ var
   CurNodeIsForwardDeclaration: Boolean;
   BestNode: TCodeTreeNode;
 begin
-  Result:=false;
+  Result:=nil;
   if Identifier='' then exit;
-  BuildTree(true);
-  StartNode:=FindInterfaceNode;
+  if BuildTheTree then BuildTree(true);
+  if Tree.Root=nil then exit;
+  if Tree.Root.Desc=ctnUnit then
+    StartNode:=FindInterfaceNode
+  else
+    StartNode:=Tree.Root;
   if StartNode=nil then exit;
   SectionNode:=StartNode.FirstChild;
   if SectionNode=nil then exit;
@@ -1342,8 +1477,32 @@ begin
     end;
     SectionNode:=SectionNode.NextBrother;
   end;
-  if BestNode<>nil then
-    Result:=JumpToNode(BestNode,NewPos,NewTopLine,false);
+  Result:=BestNode;
+end;
+
+function TFindDeclarationTool.FindMainUsesSection: TCodeTreeNode;
+begin
+  Result:=Tree.Root;
+  if Result=nil then exit;
+  if Result.Desc=ctnUnit then begin
+    Result:=Result.NextBrother;
+    if Result=nil then exit;
+  end;
+  Result:=Result.FirstChild;
+  if (Result=nil) then exit;
+  if (Result.Desc<>ctnUsesSection) then Result:=nil;
+end;
+
+function TFindDeclarationTool.FindImplementationUsesSection: TCodeTreeNode;
+begin
+  Result:=Tree.Root;
+  if Result=nil then exit;
+  while (Result<>nil) and (Result.Desc<>ctnImplementation) do
+    Result:=Result.NextBrother;
+  if Result=nil then exit;
+  Result:=Result.FirstChild;
+  if (Result=nil) then exit;
+  if (Result.Desc<>ctnUsesSection) then Result:=nil;
 end;
 
 function TFindDeclarationTool.FindDeclarationInUsesSection(

components/codetools/stdcodetools.pas

@@ -84,8 +84,6 @@ type
           var NamePos, InPos: TAtomPosition): boolean;
     function FindUnitInAllUsesSections(const UpperUnitName: string;
           var NamePos, InPos: TAtomPosition): boolean;
-    function FindMainUsesSection: TCodeTreeNode;
-    function FindImplementationUsesSection: TCodeTreeNode;
     function RenameUsedUnit(const OldUpperUnitName, NewUnitName,
           NewUnitInFile: string;
           SourceChangeCache: TSourceChangeCache): boolean;
@@ -413,31 +411,6 @@ begin
   end;
 end;
 
-function TStandardCodeTool.FindMainUsesSection: TCodeTreeNode;
-begin
-  Result:=Tree.Root;
-  if Result=nil then exit;
-  if Result.Desc=ctnUnit then begin
-    Result:=Result.NextBrother;
-    if Result=nil then exit;
-  end;
-  Result:=Result.FirstChild;
-  if (Result=nil) then exit;
-  if (Result.Desc<>ctnUsesSection) then Result:=nil;
-end;
-
-function TStandardCodeTool.FindImplementationUsesSection: TCodeTreeNode;
-begin
-  Result:=Tree.Root;
-  if Result=nil then exit;
-  while (Result<>nil) and (Result.Desc<>ctnImplementation) do
-    Result:=Result.NextBrother;
-  if Result=nil then exit;
-  Result:=Result.FirstChild;
-  if (Result=nil) then exit;
-  if (Result.Desc<>ctnUsesSection) then Result:=nil;
-end;
-
 function TStandardCodeTool.RenameUsedUnit(const OldUpperUnitName,
   NewUnitName, NewUnitInFile: string;
   SourceChangeCache: TSourceChangeCache): boolean;

designer/objinspext.pas

@@ -23,9 +23,11 @@ unit ObjInspExt;
 interface
 
 uses
-  Classes, SysUtils, ObjectInspector, Forms, Controls, Buttons, StdCtrls,
-  ExtCtrls, Dialogs, LCLProc,
-  FileUtil, LazConf, ConfigStorage, LazarusIDEStrConsts;
+  Classes, SysUtils, LCLProc, Forms, Controls, Buttons, StdCtrls, TypInfo,
+  ExtCtrls, Dialogs, Menus,
+  CodeToolManager, CodeCache,
+  LazIDEIntf, ProjectIntf, ObjectInspector, PropEdits,
+  DialogProcs, FileUtil, LazConf, ConfigStorage, LazarusIDEStrConsts;
   
 type
   { TOIAddRemoveFavouriteDlg }
@@ -67,6 +69,9 @@ function LoadOIFavouriteProperties: TOIFavouriteProperties;
 procedure SaveOIFavouriteProperties(Favourites: TOIFavouriteProperties);
 function GetOIFavouriteConfigFilename: string;
 
+function FindDeclarationOfOIProperty(AnInspector: TObjectInspector;
+  Row: TOIPropertyGridRow; out Code: TCodeBuffer; out Caret: TPoint): Boolean;
+
 implementation
 
 function CreateDefaultOIFavouriteProperties: TOIFavouriteProperties;
@@ -81,7 +86,7 @@ begin
   // TControl
   Add(TComponent,'Name');
   Add(TControl,'Anchors');
-  Add(TControl,'Caption');
+  Add(TComponent,'Caption');
   Add(TControl,'OnClick');
   // miscellaneous
   Add(TCustomGroupBox,'Align');
@@ -184,6 +189,67 @@ begin
   Result:=AppendPathDelim(GetPrimaryConfigPath)+DefaultOIFavouriteConfigFilename;
 end;
 
+function FindDeclarationOfOIProperty(AnInspector: TObjectInspector;
+  Row: TOIPropertyGridRow; out Code: TCodeBuffer; out Caret: TPoint): Boolean;
+var
+  PropPath: String;
+  LookupRoot: TPersistent;
+  AFile: TLazProjectFile;
+  NewCode: TCodeBuffer;
+  NewX, NewY, NewTopLine: integer;
+begin
+  Result:=false;
+  Code:=nil;
+  Caret:=Point(0,0);
+  if AnInspector=nil then begin
+    DebugLn('FindDeclarationOfOIProperty AnInspector=nil');
+    exit;
+  end;
+  if Row=nil then
+    Row:=AnInspector.GetActivePropertyRow;
+  if Row=nil then begin
+    DebugLn('FindDeclarationOfOIProperty Row=nil');
+    exit;
+  end;
+  // get the unit filename of the LookupRoot
+  if AnInspector.PropertyEditorHook=nil then begin
+    DebugLn('FindDeclarationOfOIProperty AnInspector.PropertyEditorHook=nil');
+    exit;
+  end;
+  LookupRoot:=AnInspector.PropertyEditorHook.LookupRoot;
+  if not (LookupRoot is TComponent) then begin
+    DebugLn('FindDeclarationOfOIProperty not (LookupRoot is TComponent)');
+    exit;
+  end;
+  AFile:=LazarusIDE.GetProjectFileWithRootComponent(TComponent(LookupRoot));
+  if AFile=nil then begin
+    DebugLn('FindDeclarationOfOIProperty AFile=nil');
+    exit;
+  end;
+  if not LazarusIDE.BeginCodeTools then begin
+    DebugLn('FindDeclarationOfOIProperty not LazarusIDE.BeginCodeTools');
+    exit;
+  end;
+  Code:=nil;
+  if LoadCodeBuffer(Code,AFile.Filename,[])<>mrOk then begin
+    exit;
+  end;
+  // create the property search path
+  PropPath:=LookupRoot.ClassName+'.'+
+            AnInspector.GetActivePropertyGrid.PropertyPath(Row);
+  // find the property declaration
+  if not CodeToolBoss.FindDeclarationOfPropertyPath(Code,PropPath,NewCode,
+    NewX,NewY,NewTopLine) then
+  begin
+    LazarusIDE.DoJumpToCodeToolBossError;
+    exit;
+  end;
+  Code:=NewCode;
+  Caret:=Point(NewX,NewY);
+  DebugLn('FindDeclarationOfOIProperty SUCCESS ',Code.Filename,' ',dbgs(Caret));
+  Result:=true;
+end;
+
 { TOIAddRemoveFavouriteDlg }
 
 procedure TOIAddRemoveFavouriteDlg.OkButtonClick(Sender: TObject);

ide/helpmanager.pas

@@ -39,7 +39,7 @@ uses
   PropEdits, ObjectInspector, FormEditingIntf, ProjectIntf,
   HelpIntf, HelpHTML, HelpFPDoc, MacroIntf, IDEWindowIntf, MsgIntf, LazIDEIntf,
   LazarusIDEStrConsts, TransferMacros, DialogProcs, IDEOptionDefs,
-  EnvironmentOpts, AboutFrm, MsgView, Project, PackageDefs, MainBar,
+  ObjInspExt, EnvironmentOpts, AboutFrm, MsgView, Project, PackageDefs, MainBar,
   OutputFilter, HelpOptions, MainIntf, LazConf, ExtCtrls, LResources,
   Interfaces;
 
@@ -621,30 +621,16 @@ end;
 procedure THelpManager.ShowHelpForObjectInspector(Sender: TObject);
 var
   AnInspector: TObjectInspector;
-  Row: TOIPropertyGridRow;
-  LookupRoot: TPersistent;
-  AFile: TLazProjectFile;
+  Code: TCodeBuffer;
+  Caret: TPoint;
+  ErrMsg: string;
 begin
   DebugLn('THelpManager.ShowHelpForObjectInspector ',dbgsName(Sender));
   if Sender=nil then Sender:=ObjectInspector1;
   if Sender is TObjectInspector then begin
     AnInspector:=TObjectInspector(Sender);
-    Row:=AnInspector.GetActivePropertyRow;
-    if Row=nil then begin
-      // TODO: show help about object inspector
-      DebugLn('THelpManager.ShowHelpForObjectInspector TODO: show help about object inspector');
-    end else begin
-      // find unit of LookupRoot
-      if AnInspector.PropertyEditorHook=nil then exit;
-      LookupRoot:=AnInspector.PropertyEditorHook.LookupRoot;
-      if not (LookupRoot is TComponent) then exit;
-      AFile:=LazarusIDE.GetProjectFileWithRootComponent(TComponent(LookupRoot));
-      if AFile=nil then exit;
-      
-      
-      if Row.Editor=nil then exit;
-      if Row.Editor.GetPropInfo=nil then exit;
-      
+    if FindDeclarationOfOIProperty(AnInspector,nil,Code,Caret) then begin
+      ShowHelpForSourcePosition(Code.Filename,Caret,ErrMsg);
     end;
   end;
 end;

ideintf/objectinspector.pp

@@ -402,6 +402,7 @@ type
     function GridHeight: integer;
     function MouseToIndex(y: integer; MustExist: boolean):integer;
     function PropertyPath(Index: integer):string;
+    function PropertyPath(Row: TOIPropertyGridRow):string;
     function TopMax: integer;
     procedure BuildPropertyList;
     procedure Clear;
@@ -978,17 +979,25 @@ begin
 end;
 
 function TOICustomPropertyGrid.PropertyPath(Index:integer):string;
-var CurRow:TOIPropertyGridRow;
 begin
   if (Index>=0) and (Index<FRows.Count) then begin
-    CurRow:=Rows[Index];
-    Result:=CurRow.Name;
-    CurRow:=CurRow.Parent;
-    while CurRow<>nil do begin
-      Result:=CurRow.Name+'.'+Result;
-      CurRow:=CurRow.Parent;
-    end;
-  end else Result:='';
+    Result:=PropertyPath(Rows[Index]);
+  end else
+    Result:='';
+end;
+
+function TOICustomPropertyGrid.PropertyPath(Row: TOIPropertyGridRow): string;
+begin
+  if Row=nil then begin
+    Result:='';
+    exit;
+  end;
+  Result:=Row.Name;
+  Row:=Row.Parent;
+  while Row<>nil do begin
+    Result:=Row.Name+'.'+Result;
+    Row:=Row.Parent;
+  end;
 end;
 
 function TOICustomPropertyGrid.GetRowByPath(

ideintf/propedits.pp

@@ -297,6 +297,7 @@ type
     function GetAttributes: TPropertyAttributes; virtual;
     function IsReadOnly: boolean; virtual;
     function GetComponent(Index: Integer): TPersistent;// for Delphi compatibility
+    function GetUnitName(Index: Integer): string;
     function GetEditLimit: Integer; virtual;
     function GetName: shortstring; virtual;
     procedure GetProperties(Proc: TGetPropEditProc); virtual;
@@ -2034,6 +2035,11 @@ begin
   Result:=FPropList^[Index].Instance;
 end;
 
+function TPropertyEditor.GetUnitName(Index: Integer): string;
+begin
+  Result:=GetClassUnitName(GetComponent(Index).ClassType);
+end;
+
 function TPropertyEditor.GetFloatValue:Extended;
 begin
   Result:=GetFloatValueAt(0);