| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package flash.tools.debugger.expression; |
| |
| import java.util.HashSet; |
| |
| import com.adobe.flash.compiler.internal.projects.ASCProject; |
| import com.adobe.flash.compiler.internal.tree.as.BinaryOperatorLogicalAndNode; |
| import com.adobe.flash.compiler.internal.tree.as.ExpressionNodeBase; |
| import com.adobe.flash.compiler.internal.workspaces.Workspace; |
| import com.adobe.flash.compiler.projects.ICompilerProject; |
| import com.adobe.flash.compiler.tree.ASTNodeID; |
| import com.adobe.flash.compiler.tree.as.IASNode; |
| import com.adobe.flash.compiler.tree.as.IExpressionNode; |
| import com.adobe.flash.compiler.workspaces.IWorkspace; |
| |
| import flash.tools.debugger.PlayerDebugException; |
| |
| /** |
| * A wrapper around an abstract syntax tree (AST) that was provided by the |
| * ActionScript Compiler (ASC), suitable for use by the debugger. |
| * |
| * When {@link #evaluate(Context)} is called, this will walk the AST and return |
| * a value. But please note that this class's implementation of expression |
| * evaluation should not be taken as a model of 100% perfect ActionScript |
| * evaluation. While this implementation handles all the cases the debugger is |
| * likely to run into, there are many edge cases that this class can't handle. |
| * For most cases where you need an on-the-fly expression evaluator, you would |
| * be better off using the code from the "esc" project. |
| * |
| * @author Mike Morearty |
| */ |
| class DebuggerExpression implements ValueExp { |
| |
| private final static HashSet<ASTNodeID> ASSIGN_OPRATORS = new HashSet<ASTNodeID>(); |
| static { |
| ASSIGN_OPRATORS.add(ASTNodeID.Op_AssignId); |
| ASSIGN_OPRATORS.add(ASTNodeID.Op_LeftShiftAssignID); |
| ASSIGN_OPRATORS.add(ASTNodeID.Op_RightShiftAssignID); |
| ASSIGN_OPRATORS.add(ASTNodeID.Op_UnsignedRightShiftAssignID); |
| ASSIGN_OPRATORS.add(ASTNodeID.Op_MultiplyAssignID); |
| ASSIGN_OPRATORS.add(ASTNodeID.Op_DivideAssignID); |
| ASSIGN_OPRATORS.add(ASTNodeID.Op_ModuloAssignID); |
| ASSIGN_OPRATORS.add(ASTNodeID.Op_BitwiseAndAssignID); |
| ASSIGN_OPRATORS.add(ASTNodeID.Op_BitwiseXorAssignID); |
| ASSIGN_OPRATORS.add(ASTNodeID.Op_BitwiseOrAssignID); |
| ASSIGN_OPRATORS.add(ASTNodeID.Op_AddAssignID); |
| ASSIGN_OPRATORS.add(ASTNodeID.Op_SubtractAssignID); |
| ASSIGN_OPRATORS.add(ASTNodeID.Op_LogicalAndAssignID); |
| ASSIGN_OPRATORS.add(ASTNodeID.Op_LogicalOrAssignID); |
| } |
| /** |
| * The AST representing the expression. |
| */ |
| private IASNode m_programNode; |
| |
| /** |
| * @see #isLookupMembers() |
| */ |
| private boolean m_lookupMembers = false; |
| |
| /** |
| * @return the AST representing the expression. |
| */ |
| public IASNode getProgramNode() { |
| return m_programNode; |
| } |
| |
| /** |
| * Sets the AST representing the expression. |
| */ |
| public void setProgramNode(IASNode programNode) { |
| m_programNode = programNode; |
| } |
| |
| /* |
| * @see flash.tools.debugger.expression.ValueExp#isLookupMembers() |
| */ |
| public boolean isLookupMembers() { |
| return m_lookupMembers; |
| } |
| |
| /** |
| * @see #isLookupMembers() |
| */ |
| public void setLookupMembers(boolean value) { |
| m_lookupMembers = value; |
| } |
| |
| /* |
| * @see flash.tools.debugger.expression.ValueExp#containsAssignment() |
| */ |
| public boolean containsAssignment() { |
| return containsAssignment(m_programNode); |
| } |
| |
| /** |
| * @param containsAssignment |
| */ |
| private boolean containsAssignment(IASNode node) { |
| if (ASSIGN_OPRATORS.contains(node.getNodeID())) { |
| return true; |
| } |
| for (int i = 0; i < node.getChildCount(); i++) { |
| if (containsAssignment(node.getChild(i))) { |
| return true; |
| } |
| } |
| return false; |
| } |
| |
| /* |
| * @see |
| * flash.tools.debugger.expression.ValueExp#evaluate(flash.tools.debugger |
| * .expression.Context) |
| */ |
| public Object evaluate(Context context) throws NumberFormatException, |
| NoSuchVariableException, PlayerFaultException, PlayerDebugException { |
| // assert m_cx.getScopeDepth() == 0; |
| // m_cx.pushScope(new ExpressionEvaluatorScope(context)); |
| try { |
| IExpressionEvaluator eval = new DebuggerExpressionEvaluator(); |
| DebuggerValue value = eval.evaluate(context, m_programNode); |
| |
| if (isLookupMembers()) { |
| return context.lookupMembers(value.debuggerValue); |
| } else { |
| return value.debuggerValue; |
| } |
| } catch (Exception e) { |
| // e.printStackTrace();//TODO : ASC3 : remove |
| if (e.getCause() instanceof NumberFormatException) { |
| throw (NumberFormatException) e.getCause(); |
| } else if (e.getCause() instanceof NoSuchVariableException) { |
| throw (NoSuchVariableException) e.getCause(); |
| } else if (e.getCause() instanceof PlayerFaultException) { |
| throw (PlayerFaultException) e.getCause(); |
| } else if (e.getCause() instanceof PlayerDebugException) { |
| throw (PlayerDebugException) e.getCause(); |
| } else { |
| e.printStackTrace(); |
| throw new PlayerDebugException(e.getLocalizedMessage()); |
| } |
| } finally { |
| // m_cx.popScope(); |
| } |
| } |
| |
| } |