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3d4e7938a7
ExtensionElement is now a marker interface that requires all implementation non-abstract classes to carry a static final QNAME field (of type QName). This is verified by a new unit test. Also FullyQualifiedElement is renamed to simply XmlElement. XmlElement is used over ExtensionElement when implementing classes do not statically know the qualified name of the XML elements they represent. In general, XmlElement should be used sparingly, and every XML element should be modeled by its own Java class (implementing ExtensionElement).
145 lines
7 KiB
Java
145 lines
7 KiB
Java
/**
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*
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* Copyright © 2018 Paul Schaub
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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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* http://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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package org.jivesoftware.smackx.message_markup.provider;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.HashSet;
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import java.util.List;
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import java.util.Set;
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import org.jivesoftware.smack.packet.XmlEnvironment;
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import org.jivesoftware.smack.provider.ExtensionElementProvider;
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import org.jivesoftware.smack.util.ParserUtils;
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import org.jivesoftware.smack.xml.XmlPullParser;
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import org.jivesoftware.smack.xml.XmlPullParserException;
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import org.jivesoftware.smackx.message_markup.element.BlockQuoteElement;
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import org.jivesoftware.smackx.message_markup.element.CodeBlockElement;
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import org.jivesoftware.smackx.message_markup.element.ListElement;
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import org.jivesoftware.smackx.message_markup.element.MarkupElement;
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import org.jivesoftware.smackx.message_markup.element.MarkupElement.MarkupChildElement;
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import org.jivesoftware.smackx.message_markup.element.SpanElement;
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public class MarkupElementProvider extends ExtensionElementProvider<MarkupElement> {
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@Override
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public MarkupElement parse(XmlPullParser parser, int initialDepth, XmlEnvironment xmlEnvironment) throws IOException, XmlPullParserException {
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MarkupElement.Builder markup = MarkupElement.getBuilder();
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int spanStart = -1, spanEnd = -1;
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Set<SpanElement.SpanStyle> spanStyles = new HashSet<>();
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int listStart = -1, listEnd = -1;
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List<ListElement.ListEntryElement> lis = new ArrayList<>();
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while (true) {
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XmlPullParser.Event tag = parser.next();
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String name = parser.getName();
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int start, end;
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switch (tag) {
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case START_ELEMENT:
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switch (name) {
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case BlockQuoteElement.ELEMENT:
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start = ParserUtils.getIntegerAttributeOrThrow(parser, MarkupChildElement.ATTR_START,
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"Message Markup BlockQuoteElement MUST contain a 'start' attribute.");
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end = ParserUtils.getIntegerAttributeOrThrow(parser, MarkupChildElement.ATTR_END,
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"Message Markup BlockQuoteElement MUST contain a 'end' attribute.");
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markup.setBlockQuote(start, end);
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break;
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case CodeBlockElement.ELEMENT:
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start = ParserUtils.getIntegerAttributeOrThrow(parser, MarkupChildElement.ATTR_START,
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"Message Markup CodeBlockElement MUST contain a 'start' attribute.");
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end = ParserUtils.getIntegerAttributeOrThrow(parser, MarkupChildElement.ATTR_END,
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"Message Markup CodeBlockElement MUST contain a 'end' attribute.");
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markup.setCodeBlock(start, end);
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break;
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case SpanElement.ELEMENT:
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spanStyles = new HashSet<>();
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spanStart = ParserUtils.getIntegerAttributeOrThrow(parser, MarkupChildElement.ATTR_START,
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"Message Markup SpanElement MUST contain a 'start' attribute.");
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spanEnd = ParserUtils.getIntegerAttributeOrThrow(parser, MarkupChildElement.ATTR_END,
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"Message Markup SpanElement MUST contain a 'end' attribute.");
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break;
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case SpanElement.code:
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spanStyles.add(SpanElement.SpanStyle.code);
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break;
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case SpanElement.emphasis:
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spanStyles.add(SpanElement.SpanStyle.emphasis);
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break;
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case SpanElement.deleted:
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spanStyles.add(SpanElement.SpanStyle.deleted);
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break;
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case ListElement.ELEMENT:
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lis = new ArrayList<>();
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listStart = ParserUtils.getIntegerAttributeOrThrow(parser, MarkupChildElement.ATTR_START,
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"Message Markup ListElement MUST contain a 'start' attribute.");
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listEnd = ParserUtils.getIntegerAttributeOrThrow(parser, MarkupChildElement.ATTR_END,
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"Message Markup ListElement MUST contain a 'end' attribute.");
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break;
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case ListElement.ListEntryElement.ELEMENT:
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start = ParserUtils.getIntegerAttributeOrThrow(parser, MarkupChildElement.ATTR_START,
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"Message Markup ListElement 'li' MUST contain a 'start' attribute.");
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lis.add(new ListElement.ListEntryElement(start));
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break;
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}
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break;
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case END_ELEMENT:
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switch (name) {
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case SpanElement.ELEMENT:
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markup.addSpan(spanStart, spanEnd, spanStyles);
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spanStart = -1; spanEnd = -1;
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break;
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case ListElement.ELEMENT:
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MarkupElement.Builder.ListBuilder listBuilder = markup.beginList();
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if (lis.size() > 0 && lis.get(0).getStart() != listStart) {
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// TODO: Should be SmackParseException.
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throw new IOException("Error while parsing incoming MessageMarkup ListElement: " +
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"'start' attribute of first 'li' element must equal 'start' attribute of list.");
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}
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for (int i = 0; i < lis.size(); i++) {
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int elemStart = lis.get(i).getStart();
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int elemEnd = i < lis.size() - 1 ? lis.get(i + 1).getStart() : listEnd;
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listBuilder.addEntry(elemStart, elemEnd);
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}
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listBuilder.endList();
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break;
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case MarkupElement.ELEMENT:
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return markup.build();
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}
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break;
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default:
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// Catch all for incomplete switch (MissingCasesInEnumSwitch) statement.
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break;
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}
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}
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}
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}
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