Question

我想生成HTML5有效文档，但我的Tapestry应用程序中的表单有问题。我正在使用如下的挂毯文本域：

<t:textfield t:id="specId" value="val" />

Tapestry生成html输入元素：

<input id="specId" name="specId" type="text"></input>

但元素输入在对中无效（带有结束标记</input>），html验证器大喊：“错误：错误结束标记输入。”。

是否有任何方式如何以单一形式生成输入标签 <input .../>？

Answer 1

您可以使用自己的MarkupModel覆盖MarkupWriterFactory服务，该MarkupModel将缩写html5 void元素而不是呈现结束标记。

public class Html5MarkupModel extends AbstractMarkupModel {
    private static final Set<String> VOID_ELEMENTS = new HashSet<String>(Arrays.asList(
            "area", "base", "br", "col", "command", "embed", "hr", "img", "input", "keygen", "link", "meta", "param", "source", "track", "wbr"
    ));

    public Html5MarkupModel(boolean useApostropheForAttributes) {
        super(useApostropheForAttributes);
    }

    public EndTagStyle getEndTagStyle(String element) {
        return VOID_ELEMENTS.contains(element) ? EndTagStyle.ABBREVIATE : EndTagStyle.REQUIRE;
    }

    public boolean isXML() {
        return false;
    }
}

public class Html5MarkupWriterFactory implements MarkupWriterFactory {

    private final PageContentTypeAnalyzer analyzer;
    private final RequestPageCache cache;

    private final MarkupModel htmlModel = new Html5MarkupModel(false);
    private final MarkupModel htmlPartialModel = new Html5MarkupModel(true);
    private final MarkupModel xmlModel = new XMLMarkupModel();
    private final MarkupModel xmlPartialModel = new XMLMarkupModel(true);

    public Html5MarkupWriterFactory(PageContentTypeAnalyzer analyzer, RequestPageCache cache) {
        this.analyzer = analyzer;
        this.cache = cache;
    }

    public MarkupWriter newMarkupWriter(ContentType contentType) {
        return newMarkupWriter(contentType, false);
    }

    public MarkupWriter newPartialMarkupWriter(ContentType contentType) {
        return newMarkupWriter(contentType, true);
    }

    public MarkupWriter newMarkupWriter(String pageName) {
        return newMarkupWriter(analyzer.findContentType(cache.get(pageName)));
    }

    private MarkupWriter newMarkupWriter(ContentType contentType, boolean partial) {
        boolean isHTML = contentType.getMimeType().equalsIgnoreCase("text/html");

        MarkupModel model = partial
                ? (isHTML ? htmlPartialModel : xmlPartialModel)
                : (isHTML ? htmlModel : xmlModel);

        // The charset parameter sets the encoding attribute of the XML declaration, if
        // not null and if using the XML model.

        return new MarkupWriterImpl(model, contentType.getCharset());
    }
}

服务覆盖贡献：

@Contribute(ServiceOverride.class)
public void contributeServiceOverrides(MappedConfiguration<Class, Object> configuration,
                                       ObjectLocator objectLocator) {
    // use proxy instead of real service instance
    // to prevent recursion on initialization cycle
    configuration.add(MarkupWriterFactory.class,
            objectLocator.proxy(MarkupWriterFactory.class, Html5MarkupWriterFactory.class));
}

Tapestry成对生成输入标签

1 个答案: