| /* |
| * 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 org.apache.myfaces.buildtools.maven2.plugin.javascript.obfuscator.javascript15parser; |
| |
| import java.util.Enumeration; |
| import java.util.Vector; |
| |
| |
| public class JSParserUtils |
| { |
| public JSParserUtils() |
| { |
| } |
| |
| /** |
| * |
| * @param funcToken |
| * @param bodyStart |
| * @param bodyEnd |
| */ |
| public static void tagEvalCalls(Token funcToken, Token bodyStart, |
| Token bodyEnd) |
| { |
| boolean hasEval = false; |
| Token token = bodyStart; |
| |
| while (token != bodyEnd) |
| { |
| if ((token.kind == JSParser15Constants.IDENTIFIER) && |
| token.image.equals("eval") && (token.next != null) && |
| (token.next.kind == JSParser15Constants.LPAREN)) |
| { |
| hasEval = true; |
| |
| break; |
| } |
| |
| token = token.next; |
| } |
| |
| ((AnnotatedToken) funcToken).setFunctionUsesEval(hasEval); |
| } |
| |
| /** |
| * |
| * @param contextStack |
| * @param token |
| */ |
| public static void pushToken(ProgramContextStack contextStack, |
| AnnotatedToken token) |
| { |
| ProgramContext context = (ProgramContext) contextStack.peek(); |
| context.addToken(token.image, token); |
| } |
| |
| /** |
| * |
| * @param contextStack |
| * @param v |
| */ |
| public static void pushTokens(ProgramContextStack contextStack, Vector v) |
| { |
| for (Enumeration item = v.elements(); item.hasMoreElements(); ) |
| { |
| AnnotatedToken t = (AnnotatedToken) item.nextElement(); |
| pushToken(contextStack, t); |
| } |
| } |
| |
| /** |
| * |
| * @param objToken |
| * @param end |
| */ |
| public static void tagObjectIdentifier(Token objToken, Token end) |
| { |
| Token t = objToken.next; |
| Token suffixToken = null; |
| |
| while (t != end) |
| { |
| if (t.kind == JSParser15Constants.DOT) |
| { |
| annotateToken(objToken, AnnotationConstants.OBJECT_IDENTIFIER, |
| null, -1); |
| suffixToken = t.next; |
| |
| if ((suffixToken != null) && |
| (suffixToken.kind == JSParser15Constants.IDENTIFIER)) |
| { |
| annotateToken(suffixToken, |
| AnnotationConstants.OBJECT_FIELD_IDENTIFIER, null, |
| -1); |
| } |
| } |
| |
| if ((t.kind == JSParser15Constants.LPAREN) && (suffixToken != null)) |
| { |
| annotateToken(suffixToken, |
| AnnotationConstants.OBJECT_METHOD_IDENTIFIER, null, |
| -1); |
| } |
| |
| t = t.next; |
| } |
| } |
| |
| /** |
| * |
| * @param contextStack |
| * @param start |
| * @param end |
| */ |
| public static void tagMethodInvocation(ProgramContextStack contextStack, |
| AnnotatedToken start, |
| AnnotatedToken end) |
| { |
| if (tagAssertProfilerCalls(contextStack, start, end)) |
| { |
| return; |
| } |
| |
| tagLoggerCalls(contextStack, start, end); |
| } |
| |
| /** |
| * |
| * @param contextStack |
| * @param start |
| * @param end |
| * @return |
| */ |
| private static boolean tagAssertProfilerCalls(ProgramContextStack contextStack, |
| AnnotatedToken start, |
| AnnotatedToken end) |
| { |
| AnnotatedToken token = start; |
| boolean isSpecialType = false; |
| boolean isRemovable = false; |
| |
| while (token != end) |
| { |
| // This checks for: |
| // "Profiler.xxx=...;" |
| // or "foo.<profiler method>;" where foo is a var of type Profiler |
| AnnotatedToken objToken = contextStack.getToken(token.image); |
| |
| if ((token.isSpecialClassType() || |
| ((objToken != null) && objToken.isSpecialObjectType())) && |
| (token.getKind() == AnnotationConstants.OBJECT_IDENTIFIER)) |
| { |
| isSpecialType = true; |
| } |
| |
| if (isSpecialType && |
| (token.getKind() == AnnotationConstants.OBJECT_METHOD_IDENTIFIER)) |
| { |
| isRemovable = true; |
| |
| break; |
| } |
| |
| token = token.getNext(); |
| } |
| |
| if (isRemovable) |
| { |
| token = start; |
| |
| while (token != end) |
| { |
| token.setRemovable(true); |
| token = token.getNext(); |
| } |
| |
| if (token.kind == JSParser15Constants.SEMICOLON) |
| { |
| token.setRemovable(true); |
| } |
| } |
| |
| return isRemovable; |
| } |
| |
| /** |
| * |
| * @param contextStack |
| * @param start |
| * @param end |
| * @return |
| */ |
| private static boolean tagLoggerCalls(ProgramContextStack contextStack, |
| AnnotatedToken start, |
| AnnotatedToken end) |
| { |
| AnnotatedToken token = start; |
| boolean isSpecialType = false; |
| boolean isLOGGER = false; |
| boolean isRemovable = false; |
| |
| while (token != end) |
| { |
| // This checks for: |
| // "Logger.LOGGER.<static method>" |
| if ((token.isSpecialClassType()) && |
| (token.getKind() == AnnotationConstants.OBJECT_IDENTIFIER)) |
| { |
| isSpecialType = true; |
| } |
| |
| if (isSpecialType && |
| (token.getKind() == AnnotationConstants.OBJECT_FIELD_IDENTIFIER) && |
| token.image.equals("LOGGER")) |
| { |
| isLOGGER = true; |
| } |
| |
| if (isLOGGER && |
| (token.getKind() == AnnotationConstants.OBJECT_METHOD_IDENTIFIER)) |
| { |
| isRemovable = true; |
| |
| break; |
| } |
| |
| token = token.getNext(); |
| } |
| |
| if (isRemovable) |
| { |
| token = start; |
| |
| while (token != end) |
| { |
| token.setRemovable(true); |
| token = token.getNext(); |
| } |
| |
| if (token.kind == JSParser15Constants.SEMICOLON) |
| { |
| token.setRemovable(true); |
| } |
| } |
| |
| return isRemovable; |
| } |
| |
| /** |
| * |
| * @param contextStack |
| * @param lhs |
| * @param op |
| * @param rhs |
| * @param end |
| */ |
| public static void tagAssignmentExpression(ProgramContextStack contextStack, |
| AnnotatedToken varToken, |
| AnnotatedToken lhs, |
| AnnotatedToken op, |
| AnnotatedToken rhs, |
| AnnotatedToken end) |
| { |
| AnnotatedToken token = (varToken != null)? varToken: lhs; |
| boolean isSpecialType = false; |
| boolean isRemovable = false; |
| ProgramContext context = (ProgramContext) contextStack.peek(); |
| |
| if (rhs.kind != JSParser15Constants.IDENTIFIER) |
| { |
| return; |
| } |
| |
| while (token != end) |
| { |
| // This checks for: |
| // "var foo = Profiler.xxx=...;" |
| // or "var bar = foo.<profiler method>;" |
| AnnotatedToken objToken = contextStack.getToken(token.image); |
| |
| if ((token.isSpecialClassType() || |
| ((objToken != null) && objToken.isSpecialObjectType())) && |
| (token.getKind() == AnnotationConstants.OBJECT_IDENTIFIER)) |
| { |
| isSpecialType = true; |
| } |
| |
| if (isSpecialType && |
| (token.getKind() == AnnotationConstants.OBJECT_METHOD_IDENTIFIER)) |
| { |
| isRemovable = true; |
| |
| break; |
| } |
| |
| token = token.getNext(); |
| } |
| |
| if (isRemovable) |
| { |
| token = (varToken != null)? varToken: lhs; |
| |
| AnnotatedToken prevToken = lhs; |
| |
| while (token != end) |
| { |
| token.setRemovable(true); |
| |
| if (token.getNext().isSpecialClassType() && |
| (token.kind == JSParser15Constants.ASSIGN)) |
| { |
| // This saves the LHS var name "foo" to be removed later. It also assigns the LHS type |
| // "var foo = Profiler.xxx=...;" |
| prevToken.setType(token.next.image); |
| context.addToken(prevToken.image, prevToken); |
| } |
| |
| prevToken = token; |
| token = token.getNext(); |
| } |
| } |
| } |
| |
| /** |
| * |
| * @param t |
| * @param annotationId |
| * @param annotationObject |
| * @param wsSensitive |
| */ |
| public static void annotateToken(Token t, int annotationId, |
| Object annotationObject, |
| int wsSensitive) |
| { |
| AnnotatedToken annToken = (AnnotatedToken) t; |
| annToken.setAnnotationKind(annotationId); |
| |
| if (annotationObject != null) |
| { |
| annToken.setAnnotationObject(annotationObject); |
| } |
| |
| if (wsSensitive >= 0) |
| { |
| annToken.setWSSensitive(wsSensitive); |
| } |
| } |
| |
| /** |
| * |
| * @param v |
| * @param annotationId |
| * @param annotationObject |
| * @param wsSensitive |
| */ |
| public static void annotateTokens(Vector v, int annotationId, |
| Object annotationObject, |
| int wsSensitive) |
| { |
| for (Enumeration item = v.elements(); item.hasMoreElements(); ) |
| { |
| Token t = (Token) item.nextElement(); |
| annotateToken(t, annotationId, annotationObject, wsSensitive); |
| } |
| } |
| } |