| /* |
| * 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 freemarker.core; |
| |
| /** |
| * An instruction that indicates that that opening |
| * and trailing whitespace on this line should be trimmed. |
| */ |
| final class TrimInstruction extends TemplateElement { |
| |
| private final int TYPE_T = 0; |
| private final int TYPE_LT = 1; |
| private final int TYPE_RT = 2; |
| private final int TYPE_NT = 3; |
| |
| final boolean left, right; |
| |
| TrimInstruction(boolean left, boolean right) { |
| this.left = left; |
| this.right = right; |
| } |
| |
| @Override |
| TemplateElement[] accept(Environment env) { |
| // This instruction does nothing at render-time, only parse-time. |
| return null; |
| } |
| |
| @Override |
| protected String dump(boolean canonical) { |
| StringBuilder sb = new StringBuilder(); |
| if (canonical) sb.append('<'); |
| sb.append(getNodeTypeSymbol()); |
| if (canonical) sb.append("/>"); |
| return sb.toString(); |
| } |
| |
| @Override |
| String getNodeTypeSymbol() { |
| if (left && right) { |
| return "#t"; |
| } else if (left) { |
| return "#lt"; |
| } else if (right) { |
| return "#rt"; |
| } else { |
| return "#nt"; |
| } |
| } |
| |
| @Override |
| boolean isIgnorable(boolean stripWhitespace) { |
| return true; |
| } |
| |
| @Override |
| int getParameterCount() { |
| return 1; |
| } |
| |
| @Override |
| Object getParameterValue(int idx) { |
| if (idx != 0) throw new IndexOutOfBoundsException(); |
| int type; |
| if (left && right) { |
| type = TYPE_T; |
| } else if (left) { |
| type = TYPE_LT; |
| } else if (right) { |
| type = TYPE_RT; |
| } else { |
| type = TYPE_NT; |
| } |
| return Integer.valueOf(type); |
| } |
| |
| @Override |
| ParameterRole getParameterRole(int idx) { |
| if (idx != 0) throw new IndexOutOfBoundsException(); |
| return ParameterRole.AST_NODE_SUBTYPE; |
| } |
| |
| @Override |
| boolean isOutputCacheable() { |
| return true; |
| } |
| |
| @Override |
| boolean isNestedBlockRepeater() { |
| return false; |
| } |
| |
| } |