New visualizer

ASTPlayground/ASTPlayground.dpr

@@ -20,8 +20,7 @@ uses
     Myc.Fmx.AstEditor.Text in 'Myc.Fmx.AstEditor.Text.pas',
     Myc.Utils in '..\Src\Myc.Utils.pas',
     Myc.Ast.Script in '..\Src\AST\Myc.Ast.Script.pas',
-    Myc.Ast.Types in '..\Src\AST\Myc.Ast.Types.pas',
+    Myc.Ast.Types in '..\Src\AST\Myc.Ast.Types.pas';
-    Myc.Fmx.AstVisualizer in 'Myc.Fmx.AstVisualizer.pas';
 
 {$R *.res}
 

ASTPlayground/ASTPlayground.dproj

@@ -151,7 +151,6 @@
         <DCCReference Include="..\Src\Myc.Utils.pas"/>
         <DCCReference Include="..\Src\AST\Myc.Ast.Script.pas"/>
         <DCCReference Include="..\Src\AST\Myc.Ast.Types.pas"/>
-        <DCCReference Include="Myc.Fmx.AstVisualizer.pas"/>
         <BuildConfiguration Include="Base">
             <Key>Base</Key>
         </BuildConfiguration>

ASTPlayground/MainForm.pas

@@ -36,7 +36,6 @@ uses
     FMX.Layouts,
     FMX.Objects,
     Myc.Ast.Debugger,
-    Myc.Fmx.AstVisualizer,
     Myc.Fmx.AstEditor.Node,
     Myc.Fmx.AstEditor.Workspace,
     FMX.DialogService,

ASTPlayground/Myc.Fmx.AstEditor.Workspace.pas

@@ -91,7 +91,7 @@ implementation
 uses
     System.Math,
     FMX.Platform,
-    Myc.Fmx.AstVisualizer;
+    Myc.Fmx.AstEditor.Node;
 
 { TPinConnection }
 
@@ -111,7 +111,8 @@ end;
 
 procedure TAuraWorkspace.Build(const RootNode: IAstNode; const Position: TPointF);
 begin
-    RootNode.Accept(TAstVisualizer.CreateVisitor(Self, Position));
+    var visu := TAstVisualizer.Create(Self, Self, 0) as IAstVisualizer;
+    visu.CallAccept(RootNode);
 end;
 
 procedure TAuraWorkspace.DoDeleteChildren;

ASTPlayground/Myc.Fmx.AstVisualizer.pas

@@ -1,4 +1,4 @@
-unit Myc.Fmx.AstVisualizer;
+unit Myc.Fmx.AstVisualizer deprecated;
 
 interface
 
@@ -25,14 +25,13 @@ uses
 
 type
     // Visits the AST and creates visual TAuraNode representations on a TAuraWorkspace.
-    TAstVisualizer = class(TAstVisitor)
+    TAstVisualizer = class(TAstVisitor, IAstVisualizer)
     private
-        FWorkspace: TAuraWorkspace;
+        FCurrentPos: TPointF;
-        FParentControl: TControl; // The current parent FMX control for newly created nodes
-        FCurrentPos: TPointF; // Current position for the next node relative to FParentControl
-        FNodeVerticalGap: Single; // Vertical gap between nodes
         FExprDepth: Integer;
-
+        FWorkspace: TAuraWorkspace;
+        FNodeVerticalGap: Single;
+        FParentControl: TControl;
         // Helper to create and initialize a TAuraNode for a given AST node.
         function CreateNode(const Node: IAstNode): TAuraNode;
         function AddLabel(const ParentNode: TAuraNode; const Txt: String): TLabel;
@@ -44,7 +43,12 @@ type
 
         // Calls Accept on the node and returns the resulting TAuraNode.
         function CallAccept(const Node: IAstNode): TAuraNode;
-
+        function GetCurrentPos: TPointF;
+        function GetExprDepth: Integer;
+        function GetParentControl: TControl;
+        procedure SetCurrentPos(const Value: TPointF);
+        procedure SetExprDepth(const Value: Integer);
+        procedure SetParentControl(const Value: TControl);
     protected
         // Visitor implementations for each AST node type.
         function VisitConstant(const Node: IConstantNode): TDataValue; override;
@@ -71,10 +75,22 @@ type
         function VisitRecurNode(const Node: IRecurNode): TDataValue; override;
 
     public
-        constructor Create(AWorkspace: TAuraWorkspace; AParentControl: TControl; const AStartPosition: TPointF);
+        constructor Create(
+            AWorkspace: TAuraWorkspace;
+            AParentControl: TControl;
+            const AStartPosition: TPointF;
+            ANodeVerticalGap: Single = 15;
+            AExprDepth: Integer = 0
+        );
         destructor Destroy; override;
 
+        function Clone: IAstVisualizer;
+
         class function CreateVisitor(AWorkspace: TAuraWorkspace; const StartPosition: TPointF): IAstVisitor;
+
+        property CurrentPos: TPointF read GetCurrentPos write SetCurrentPos;
+        property ExprDepth: Integer read GetExprDepth write SetExprDepth;
+        property ParentControl: TControl read GetParentControl write SetParentControl;
     end;
 
 implementation
@@ -89,24 +105,25 @@ uses
     Myc.Fmx.AstEditor.Text;
 
 const
-    cNodePadding = 10; // Reduced padding
-    cTitleTopPadding = 2;
-    cTitleBottomPadding = 4;
     cChildAreaTopPadding = 5;
     cNodeVerticalGap = 10; // Reduced gap
-    cMinNodeWidth = 10;
-    cMinNodeHeight = 10;
 
 { TAstVisualizer }
 
-constructor TAstVisualizer.Create(AWorkspace: TAuraWorkspace; AParentControl: TControl; const AStartPosition: TPointF);
+constructor TAstVisualizer.Create(
+    AWorkspace: TAuraWorkspace;
+    AParentControl: TControl;
+    const AStartPosition: TPointF;
+    ANodeVerticalGap: Single = 15;
+    AExprDepth: Integer = 0
+);
 begin
     inherited Create;
     FWorkspace := AWorkspace;
     FParentControl := AParentControl;
     FCurrentPos := AStartPosition;
-    FNodeVerticalGap := 15; // Vertical gap between child nodes
+    FNodeVerticalGap := ANodeVerticalGap;
-    FExprDepth := 0;
+    FExprDepth := AExprDepth;
 end;
 
 destructor TAstVisualizer.Destroy;
@@ -264,6 +281,26 @@ begin
     end;
 end;
 
+function TAstVisualizer.Clone: IAstVisualizer;
+begin
+    Result := TAstVisualizer.Create(FWorkspace, FParentControl, FCurrentPos, FNodeVerticalGap, FExprDepth);
+end;
+
+function TAstVisualizer.GetCurrentPos: TPointF;
+begin
+    Result := FCurrentPos;
+end;
+
+function TAstVisualizer.GetExprDepth: Integer;
+begin
+    Result := FExprDepth;
+end;
+
+function TAstVisualizer.GetParentControl: TControl;
+begin
+    Result := FParentControl;
+end;
+
 // Generic processing logic for AST nodes with children. Returns the created TAuraNode.
 function TAstVisualizer.ProcessStub(const ATitle: string; const ANode: IAstNode; const AChildren: TArray<IAstNode>): TAuraNode;
 var
@@ -308,157 +345,62 @@ begin
     Result := auraNode; // Return the created node
 end;
 
+procedure TAstVisualizer.SetCurrentPos(const Value: TPointF);
+begin
+    FCurrentPos := Value;
+end;
+
+procedure TAstVisualizer.SetExprDepth(const Value: Integer);
+begin
+    FExprDepth := Value;
+end;
+
+procedure TAstVisualizer.SetParentControl(const Value: TControl);
+begin
+    FParentControl := Value;
+end;
+
 // --- Visitor Implementations ---
 
 function TAstVisualizer.VisitConstant(const Node: IConstantNode): TDataValue;
-var
-    auraNode: TAuraNode;
-    valueStr: string;
-    isConcise: Boolean;
 begin
-    valueStr := Node.Value.ToString;
+    var auraNode := TAuraConstantNode.CreateConstantNode(FWorkspace, Node, Self);
-    // Check if it's a number or a single-line text and not excessively long
-    isConcise := ((Node.Value.Kind = TDataValueKind.vkScalar) or (Pos(sLineBreak, valueStr) = 0)) and (Length(valueStr) < 40);
 
-    auraNode := CreateNode(Node); // Create node without title
-    auraNode.BeginUpdate;
-    try
-        if isConcise then
-        begin
-            // Display value directly in a centered label, frameless node
-            auraNode.Frameless := true;
-            AddLabel(auraNode, valueStr);
-        end
-        else
-        begin
-            // Use standard framed node with Title label + Value label
-            auraNode.Frameless := False;
-
-            // Title Label
-            var titleLabelHeight := AddTitleLabel(auraNode, 'Constant');
-
-            // Value Label
-            var valueLabel := AddLabel(auraNode, valueStr);
-            valueLabel.Position.Y := valueLabel.Position.Y + titleLabelHeight;
-            valueLabel.AutoSize := False; // ***Important: Disable AutoSize when Align=Client***
-            valueLabel.WordWrap := True; // Allow wrapping for long text
-        end;
-
-        AdjustParentNodeSize(auraNode, []); // Adjust based on labels' sizes
-    finally
-        auraNode.EndUpdate;
-    end;
     // Move current position down for the next sibling node
     FCurrentPos.Y := FCurrentPos.Y + auraNode.Height + FNodeVerticalGap;
+
     Result := TDataValue.FromGeneric<TAuraNode>(auraNode); // Return the created node
 end;
 
 function TAstVisualizer.VisitIdentifier(const Node: IIdentifierNode): TDataValue;
 var
-    auraNode: TAuraNode;
+    auraNode: TAuraIdentifierNode; // Use specific type
 begin
-    // Leaf node, direct creation without ProcessStub
+    // Create the specific node type using its factory
-    auraNode := CreateNode(Node);
+    auraNode := TAuraIdentifierNode.CreateIdentifierNode(FWorkspace, Node, Self);
-    auraNode.Frameless := True; // Make identifiers frameless like concise constants
+
-    auraNode.BeginUpdate;
+    // Move current position down for the next sibling node
-    try
-        auraNode.Frameless := true;
-        AddLabel(auraNode, Node.Name);
-        AdjustParentNodeSize(auraNode, []); // Fallback just in case
-    finally
-        auraNode.EndUpdate;
-    end;
     FCurrentPos.Y := FCurrentPos.Y + auraNode.Height + FNodeVerticalGap;
-    Result := TDataValue.FromGeneric<TAuraNode>(auraNode); // Return the created node
+
+    Result := TDataValue.FromGeneric<TAuraNode>(auraNode); // Return as generic TAuraNode
 end;
 
 function TAstVisualizer.VisitBinaryExpression(const Node: IBinaryExpressionNode): TDataValue;
 var
-    auraNode: TAuraNode;
+    auraNode: TAuraBinaryExpressionNode; // Use specific type
-    leftNode: TAuraNode; // Use TAuraNode directly
-    operatorLabel: TLabel;
-    rightNode: TAuraNode; // Use TAuraNode directly
-    savedParent: TControl;
     savedPos: TPointF;
-    currentX: Single; // Track horizontal position
-    maxHeightInRow: Single; // Track max height for row alignment
-    yPos: Single; // Y position for elements in this row
 begin
-    // Create the main node, frameless as it primarily serves as a container
+    // Store position before creating the node
-    auraNode := CreateNode(Node);
+    savedPos := FCurrentPos;
-    auraNode.BeginUpdate;
-    inc(FExprDepth);
-    try
-        auraNode.Frameless := true;
 
-        // Start position for children inside the node
+    // Create the specific node type using its factory
-        currentX := cNodePadding;
+    auraNode := TAuraBinaryExpressionNode.CreateBinaryExpressionNode(FWorkspace, Node, Self);
-        yPos := cNodePadding; // Initial Y position
-        maxHeightInRow := 0;
 
-        // 1. Left Expression Node (Visited Recursively)
+    // Move current position down for the next sibling node
-        savedParent := FParentControl;
+    // Use the position saved *before* creating this node, plus the node's final height
-        savedPos := FCurrentPos; // Store original position for siblings
+    FCurrentPos.Y := savedPos.Y + auraNode.Height + FNodeVerticalGap;
-        FParentControl := auraNode; // Children are added to this node
-        FCurrentPos := TPointF.Create(currentX, yPos); // Set position for the child node
 
-        leftNode := CallAccept(Node.Left); // Use CallAccept and store result
+    Result := TDataValue.FromGeneric<TAuraNode>(auraNode); // Return as generic TAuraNode
-
-        if Assigned(leftNode) then
-        begin
-            // Update currentX based on the right edge of the left control + gap
-            currentX := leftNode.Position.X + leftNode.Width + leftNode.Margins.Right + cNodePadding;
-            maxHeightInRow := Max(maxHeightInRow, leftNode.Height + leftNode.Margins.Top + leftNode.Margins.Bottom);
-        end;
-
-        // 2. Operator Label
-        operatorLabel := AddLabel(auraNode, Node.Operator.ToString);
-        operatorLabel.Position.Point := TPointF.Create(currentX, yPos); // Position next to left operand
-        currentX := operatorLabel.Position.X + operatorLabel.Width + operatorLabel.Margins.Right + cNodePadding; // Update X pos
-        maxHeightInRow := Max(maxHeightInRow, operatorLabel.Height + operatorLabel.Margins.Top + operatorLabel.Margins.Bottom);
-
-        // 3. Right Expression Node (Visited Recursively)
-        // FParentControl is already auraNode
-        FCurrentPos := TPointF.Create(currentX, yPos); // Set position for the child node
-
-        rightNode := CallAccept(Node.Right); // Use CallAccept and store result
-
-        if Assigned(rightNode) then
-        begin
-            // Update currentX based on the right edge of the right control
-            currentX := rightNode.Position.X + rightNode.Width + rightNode.Margins.Right;
-            maxHeightInRow := Max(maxHeightInRow, rightNode.Height + rightNode.Margins.Top + rightNode.Margins.Bottom);
-        end;
-
-        FParentControl := savedParent; // Restore parent for siblings
-        FCurrentPos := savedPos; // Restore position for siblings
-
-        // --- Adjust parent size ---
-        auraNode.Width := Max(cMinNodeWidth, currentX + cNodePadding); // Total width needed + right padding
-        auraNode.Height := Max(cMinNodeHeight, maxHeightInRow + 2 * cNodePadding); // Max height + top/bottom padding
-
-        // --- Optional Vertical Centering ---
-        var centerOffsetY: Single := (auraNode.Height / 2);
-        if Assigned(leftNode) then
-            leftNode.Position.Y :=
-                centerOffsetY - (leftNode.Height + leftNode.Margins.Top + leftNode.Margins.Bottom) / 2 + leftNode.Margins.Top;
-        if Assigned(operatorLabel) then
-            operatorLabel.Position.Y :=
-                centerOffsetY
-                    - (operatorLabel.Height + operatorLabel.Margins.Top + operatorLabel.Margins.Bottom) / 2
-                    + operatorLabel.Margins.Top;
-        if Assigned(rightNode) then
-            rightNode.Position.Y :=
-                centerOffsetY - (rightNode.Height + rightNode.Margins.Top + rightNode.Margins.Bottom) / 2 + rightNode.Margins.Top;
-        // --- End Optional Vertical Centering ---
-
-    finally
-        dec(FExprDepth);
-        auraNode.EndUpdate;
-    end;
-    // Move current position down for the next sibling node in the outer scope
-    FCurrentPos.Y := savedPos.Y + auraNode.Height + FNodeVerticalGap; // Use savedPos.Y for vertical alignment with siblings
-    Result := TDataValue.FromGeneric<TAuraNode>(auraNode); // Return the created node
 end;
 
 function TAstVisualizer.VisitUnaryExpression(const Node: IUnaryExpressionNode): TDataValue;

Src/AST/Myc.Ast.pas

@@ -105,7 +105,7 @@ type
         function GetOperator: TScalar.TBinaryOp;
         function GetRight: IAstNode;
     public
-        constructor Create(ALeft: IAstNode; AOperator: TScalar.TBinaryOp; ARight: IAstNode);
+        constructor Create(const ALeft: IAstNode; AOperator: TScalar.TBinaryOp; const ARight: IAstNode);
         function Accept(const Visitor: IAstVisitor): TDataValue; override;
     end;
 
@@ -369,7 +369,7 @@ end;
 
 { TBinaryExpressionNode }
 
-constructor TBinaryExpressionNode.Create(ALeft: IAstNode; AOperator: TScalar.TBinaryOp; ARight: IAstNode);
+constructor TBinaryExpressionNode.Create(const ALeft: IAstNode; AOperator: TScalar.TBinaryOp; const ARight: IAstNode);
 begin
     inherited Create;
     FLeft := ALeft;

Src/Data/Myc.Data.Value.pas

@@ -143,7 +143,8 @@ begin
     if FKind <> vkGeneric then
         raise EInvalidCast.Create('Cannot read value as generic of ' + String(PTypeInfo(TypeInfo(T)).Name) + '.');
 {$ifdef DEBUG}
-    if TVal<T>(FInterface).TypeHandle <> TypeInfo(T) then
+    var val := TVal<T>(FInterface);
+    if val.TypeHandle <> TypeInfo(T) then
         raise EInvalidCast.Create('Generic type is not a ' + String(PTypeInfo(TypeInfo(T)).Name) + '.');
 {$endif}
     Result := TVal<T>(FInterface).Value;