| /* |
| * Copyright 2004-2005 the original author or authors. |
| * |
| * Licensed 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.codehaus.groovy.grails.web.pages; |
| |
| import java.util.regex.Matcher; |
| import java.util.regex.Pattern; |
| |
| /** |
| * NOTE: Based on work done by on the GSP standalone project (https://gsp.dev.java.net/) |
| * |
| * Utility class to strip HTML from around tags that specify it. |
| * |
| * @author Troy Heninger |
| * Date: Jan 10, 2004 |
| * |
| */ |
| class Strip { |
| private static Pattern stripTag = Pattern.compile("\\^([a-zA-Z]+)%\\{([^}]|\\}[^%])*\\}%"); |
| private static Pattern anyTag = Pattern.compile("((\\^[a-zA-Z])?%\\{([^}]|\\}[^%])*\\}%|[$@]\\{[^}]*\\})"); |
| |
| private StringBuffer text; |
| |
| Strip(CharSequence text) { |
| this.text = new StringBuffer(text.toString()); |
| } // Scan() |
| |
| void strip(int index) { |
| Matcher match = stripTag.matcher(text); |
| if (match.find(index)) { |
| strip(match.end()); |
| String tag = match.group(1); |
| int start = match.start() + 1 + tag.length(); // begin after '^tag'; at the '%{' |
| int end = match.end(); |
| Pattern patAfter = Pattern.compile("</" + tag + "(>|[^>a-zA-Z][^>]*>)\\s*", Pattern.CASE_INSENSITIVE); |
| Matcher matchAfter = patAfter.matcher(text); |
| if (matchAfter.find(end)) { |
| int end2 = matchAfter.end(); |
| Matcher matchAny = anyTag.matcher(text.subSequence(0, end2)); |
| if (matchAny.find(end)) end2 = matchAny.start(); |
| Pattern nextTagPat = Pattern.compile("<" + tag + "(\\s|>)", Pattern.CASE_INSENSITIVE); |
| Matcher matchNext = nextTagPat.matcher(text.subSequence(0, end2)); |
| if (matchNext.find(end)) end2 = matchNext.start(); |
| // System.out.println("Stripping " + text.subSequence(end, end2)); |
| text.delete(end, end2); |
| } |
| Pattern patBefore = Pattern.compile(new Reverse("*s\\<" + tag).toString(), |
| Pattern.CASE_INSENSITIVE); |
| Matcher matchBefore = patBefore.matcher(new Reverse(text, 0, start)); |
| if (matchBefore.find()) { |
| int start2 = start - matchBefore.end(); |
| Matcher matchAny = anyTag.matcher(text.subSequence(0, start)); |
| if (matchAny.find(start2)) start2 = matchAny.end(); |
| // System.out.println("Stripping " + text.subSequence(start2, start)); |
| text.delete(start2, start); |
| } |
| } |
| } // strip() |
| |
| public String toString() { |
| return text.toString(); |
| } |
| |
| } // Strip |