📄 wicketnamespacehandler.java
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/* * 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.wicket.markup.parser.filter;import java.text.ParseException;import java.util.Iterator;import java.util.Map;import org.apache.wicket.Application;import org.apache.wicket.markup.ComponentTag;import org.apache.wicket.markup.MarkupResourceData;import org.apache.wicket.markup.MarkupElement;import org.apache.wicket.markup.parser.AbstractMarkupFilter;import org.apache.wicket.util.value.IValueMap;/** * This is a markup inline filter. It determines the Wicket namespace name from the markup Examples * are xmlns:wicket or xmlns:wicket="http://wicket.apache.org". * * @see org.apache.wicket.markup.MarkupParser * @author Juergen Donnerstag */public final class WicketNamespaceHandler extends AbstractMarkupFilter{ /** Wicket URI */ private static final String WICKET_URI = "http://wicket.apache.org"; /** The markup created by reading the markup file */ private final MarkupResourceData markup; /** * namespace prefix: e.g. <html xmlns:wicket="http://wicket.apache.org"> */ private static final String XMLNS = "xmlns:"; /** * Construct. * * @param markup * The markup created by reading the markup file */ public WicketNamespaceHandler(final MarkupResourceData markup) { this.markup = markup; } /** * Get the next tag from the next MarkupFilter in the chain and search for Wicket specific tags. * * @see org.apache.wicket.markup.parser.IMarkupFilter#nextTag() * @return The next tag from markup to be processed. If null, no more tags are available */ public MarkupElement nextTag() throws ParseException { // Get the next tag from the markup. // If null, no more tags are available final ComponentTag tag = nextComponentTag(); if (tag == null) { return tag; } if (tag.isOpen() && "html".equals(tag.getName().toLowerCase())) { final String namespace = determineWicketNamespace(tag); if (namespace != null) { markup.setWicketNamespace(namespace); } } return tag; } /** * Determine wicket namespace from xmlns:wicket or xmlns:wicket="http://wicket.apache.org" * * @param tag * @return Wicket namespace */ private String determineWicketNamespace(final ComponentTag tag) { // For all tags attributes final IValueMap attributes = tag.getAttributes(); final Iterator it = attributes.entrySet().iterator(); while (it.hasNext()) { final Map.Entry entry = (Map.Entry)it.next(); // Find attributes with namespace "xmlns" final String attributeName = (String)entry.getKey(); if (attributeName.startsWith(XMLNS)) { final String xmlnsUrl = (String)entry.getValue(); // If Wicket relevant ... if ((xmlnsUrl == null) || (xmlnsUrl.trim().length() == 0) || xmlnsUrl.startsWith(WICKET_URI)) { // Set the Wicket namespace for wicket tags (e.g. // <wicket:panel>) and attributes (e.g. wicket:id) final String namespace = attributeName.substring(XMLNS.length()); if (Application.get().getMarkupSettings().getStripWicketTags()) { attributes.remove(attributeName); // Make sure the parser knows it has been changed tag.setModified(true); } return namespace; } } } return null; }}⌨️ 快捷键说明
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