81 lines
2.2 KiB
Java
81 lines
2.2 KiB
Java
/*
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* Copyright 2023 the original author or authors.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* https://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*/
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package rife.render;
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import rife.template.Template;
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import rife.template.ValueRenderer;
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import rife.tools.Localization;
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/**
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* <p>Converts a template value to a quoted-printable string.</p>
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*
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* <p>Usage:</p>
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*
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* <pre>
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* <!--v render:rife.render.EncodeQp:valueId/-->
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* {{v render:rife.render.EncodeQp:valueId/}}
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* </pre>
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*
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* @author <a href="https://erik.thauvin.net/">Erik C. Thauvin</a>
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* @since 1.0
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*/
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public class EncodeQp implements ValueRenderer {
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/**
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* Converts the given String to a quoted-printable string.
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*
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* @param src the source String
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* @return the quoted-printable String
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*/
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public static String toQuotedPrintable(String src) {
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if (src == null || src.isEmpty()) {
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return src;
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}
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char c;
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var buff = new StringBuilder(src.length());
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String hex;
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for (var i = 0; i < src.length(); i++) {
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c = src.charAt(i);
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if (((c > 47) && (c < 58)) || ((c > 64) && (c < 91)) || ((c > 96) && (c < 123))) {
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buff.append(c);
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} else {
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hex = Integer.toString(c, 16);
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buff.append('=');
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if (hex.length() == 1) {
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buff.append('0');
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}
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buff.append(hex.toUpperCase(Localization.getLocale()));
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}
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}
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return buff.toString();
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}
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/**
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* {@inheritDoc}
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*/
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@Override
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public String render(Template template, String valueId, String differentiator) {
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return toQuotedPrintable(RenderUtils.fetchValue(template, differentiator));
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}
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}
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