From c40bc842d55450a3393ec0de41de481b732dc9ad Mon Sep 17 00:00:00 2001
From: lazarus <lazarus@lazarus-ide.org>
Date: Mon, 11 Mar 2002 18:12:11 +0000
Subject: [PATCH] MG: acclerated parser read-undo-read combinations

git-svn-id: trunk@1501 -
---
 components/codetools/customcodetool.pas   | 20 ++++++++---
 components/codetools/pascalparsertool.pas |  3 +-
 lcl/include/graphic.inc                   | 43 ++++++++++-------------
 3 files changed, 35 insertions(+), 31 deletions(-)

diff --git a/components/codetools/customcodetool.pas b/components/codetools/customcodetool.pas
index 2e12715c55..97dcc2b94f 100644
--- a/components/codetools/customcodetool.pas
+++ b/components/codetools/customcodetool.pas
@@ -68,6 +68,7 @@ type
     SrcLen: integer;
     CurNode: TCodeTreeNode;
     LastAtoms: TAtomRing;
+    NextPos: TAtomPosition;
     
     CheckFilesOnDisk: boolean;
     IndentSize: integer;
@@ -199,6 +200,7 @@ begin
   CurPos.StartPos:=1;
   CurPos.EndPos:=-1;
   LastAtoms.Clear;
+  NextPos.StartPos:=-1;
 end;
 
 procedure TCustomCodeTool.RaiseException(const AMessage: string);
@@ -539,11 +541,16 @@ procedure TCustomCodeTool.ReadNextAtom;
 var c1, c2: char;
   CommentLvl: integer;
 begin
-  // Skip all spaces and comments
-  CommentLvl:=0;
   if (CurPos.StartPos<CurPos.EndPos) and (CurPos.StartPos>=1) then
     LastAtoms.Add(CurPos);
+  if NextPos.StartPos>=1 then begin
+    CurPos:=NextPos;
+    NextPos.StartPos:=-1;
+    exit;
+  end;
   CurPos.StartPos:=CurPos.EndPos;
+  // Skip all spaces and comments
+  CommentLvl:=0;
   //if CurPos.StartPos<1 then CurPos.StartPos:=SrcLen+1;
   while CurPos.StartPos<=SrcLen do begin
     if IsCommentStartChar[Src[CurPos.StartPos]] then begin
@@ -747,6 +754,7 @@ begin
     UndoReadNextAtom;
     exit;
   end;
+  NextPos:=CurPos;
   // Skip all spaces and comments
   CommentLvl:=0;
   dec(CurPos.StartPos);
@@ -1009,6 +1017,7 @@ end;
 procedure TCustomCodeTool.UndoReadNextAtom;
 begin
   if LastAtoms.Count>0 then begin
+    NextPos:=CurPos;
     CurPos:=LastAtoms.GetValueAt(0);
     LastAtoms.UndoLastAdd;
   end else
@@ -1147,15 +1156,14 @@ begin
   CurPos.StartPos:=1;
   CurPos.EndPos:=1;
   LastAtoms.Clear;
+  NextPos.StartPos:=-1;
   CurNode:=nil;
   if DeleteNodes then DoDeleteNodes;
 end;
 
 procedure TCustomCodeTool.MoveCursorToNodeStart(ANode: TCodeTreeNode);
 begin
-  CurPos.StartPos:=ANode.StartPos;
-  CurPos.EndPos:=ANode.StartPos;
-  LastAtoms.Clear;
+  MoveCursorToCleanPos(ANode.StartPos);
   CurNode:=ANode;
 end;
 
@@ -1164,6 +1172,7 @@ begin
   CurPos.StartPos:=ACleanPos;
   CurPos.EndPos:=ACleanPos;
   LastAtoms.Clear;
+  NextPos.StartPos:=-1;
   CurNode:=nil;
 end;
 
@@ -1368,6 +1377,7 @@ begin
       // search first atom in line
       CurPos.StartPos:=ALineStart;
       CurPos.EndPos:=ALineStart;
+      NextPos.StartPos:=-1;
       ReadNextAtom;
       AFirstAtomStart:=CurPos.StartPos;
       // search last atom in line
diff --git a/components/codetools/pascalparsertool.pas b/components/codetools/pascalparsertool.pas
index 0948f5b30c..b91249df2f 100644
--- a/components/codetools/pascalparsertool.pas
+++ b/components/codetools/pascalparsertool.pas
@@ -2960,8 +2960,7 @@ begin
     if (GrandPaNode=nil) or (GrandPaNode.Desc<>ctnClass) then exit;
     GrandPaNode:=GrandPaNode.Parent;
     if GrandPaNode.Desc<>ctnTypeDefinition then exit;
-    CurPos.StartPos:=GrandPaNode.StartPos;
-    CurPos.EndPos:=CurPos.StartPos;
+    MoveCursorToCleanPos(GrandPaNode.StartPos);
     ReadNextAtom;
     if not AtomIsWord then exit;
     TheClassName:=GetAtom;
diff --git a/lcl/include/graphic.inc b/lcl/include/graphic.inc
index 095f98a874..c1972dc28e 100644
--- a/lcl/include/graphic.inc
+++ b/lcl/include/graphic.inc
@@ -34,31 +34,27 @@ end;
 function TGraphic.Equals(Graphic: TGraphic): Boolean;
 var
   SelfImage, GraphicsImage: TMemoryStream;
+  IsEmpty: boolean;
 begin
-  Result := (Graphic <> nil);
+  Result := (Graphic <> nil) and (ClassType = Graphic.ClassType);
   if not Result then exit;
-  Result:=(ClassType = Graphic.ClassType);
-  if not Result then exit;
-  if Empty or Graphic.Empty then
-  begin
-    Result := Empty and Graphic.Empty;
-    Exit;
-  end;
-  if Result then begin
-    SelfImage := TMemoryStream.Create;
+  IsEmpty:=Empty;
+  Result:=(IsEmpty=Graphic.Empty);
+  if (not Result) or IsEmpty or (Self=Graphic) then exit;
+  // ToDo: check for same resource
+  SelfImage := TMemoryStream.Create;
+  try
+    WriteData(SelfImage);
+    GraphicsImage := TMemoryStream.Create;
     try
-      WriteData(SelfImage);
-      GraphicsImage := TMemoryStream.Create;
-      try
-        Graphic.WriteData(GraphicsImage);
-        Result := (SelfImage.Size = GraphicsImage.Size) and
-          CompareMem(SelfImage.Memory, GraphicsImage.Memory, SelfImage.Size);
-      finally
-        GraphicsImage.Free;
-      end;
+      Graphic.WriteData(GraphicsImage);
+      Result := (SelfImage.Size = GraphicsImage.Size) and
+        CompareMem(SelfImage.Memory, GraphicsImage.Memory, SelfImage.Size);
     finally
-      SelfImage.Free;
+      GraphicsImage.Free;
     end;
+  finally
+    SelfImage.Free;
   end;
 end;
 
@@ -104,17 +100,16 @@ end;
 procedure TGraphic.SetModified(Value: Boolean);
 begin
   if Value then
-    FModified := true // Changed(Self);
+    Changed(Self);
   else
     FModified := False;
 end;
 
 procedure TGraphic.SetTransparent(Value: Boolean);
 begin
-  if Value <> FTransparent then
-  begin
+  if Value <> FTransparent then begin
     FTransparent := Value;
-    //Changed(Self);
+    Changed(Self);
   end;
 end;