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| package org.apache.tapestry.contrib.link; |
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| import org.apache.hivemind.ApplicationRuntimeException; |
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| import org.apache.tapestry.IMarkupWriter; |
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| import org.apache.tapestry.IRequestCycle; |
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| import org.apache.tapestry.Tapestry; |
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| import org.apache.tapestry.components.ILinkComponent; |
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| import org.apache.tapestry.engine.ILink; |
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| import org.apache.tapestry.link.ILinkRenderer; |
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| public class ButtonLinkRenderer implements ILinkRenderer |
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| { |
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| public static final ILinkRenderer SHARED_INSTANCE = new ButtonLinkRenderer(); |
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| public void renderLink(IMarkupWriter writer, IRequestCycle cycle, ILinkComponent component)
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| { |
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| if (cycle.getAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME) != null)
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| { |
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| String message = Tapestry.getMessage("AbstractLinkComponent.no-nesting");
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| throw new ApplicationRuntimeException(message, component, null, null);
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| } |
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| cycle.setAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME, component);
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| ILink link = component.getLink(cycle);
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| writer.begin("button");
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| writer.attribute("type", "button");
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| if (component.isDisabled())
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| { |
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| writer.attribute("disabled", "disabled");
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| } |
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| if (!cycle.isRewinding()) {
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| String url = link.getURL(component.getAnchor(), true);
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| String target = component.getTarget();
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| String onclick = (target == null) ? getScript(url) : getScript(url, target);
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| writer.attribute("onclick", onclick);
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| } |
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| component.renderAdditionalAttributes(writer, cycle);
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| IMarkupWriter wrappedWriter = writer.getNestedWriter();
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| component.renderBody(wrappedWriter, cycle);
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| wrappedWriter.close();
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| writer.end();
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| cycle.removeAttribute(Tapestry.LINK_COMPONENT_ATTRIBUTE_NAME);
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| } |
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| protected String getScript(String url)
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| { |
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| return "window.location='" + url + "'";
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| } |
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| protected String getScript(String url, String target)
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| { |
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| return "window.open('" + url + "','" + target + "')";
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| } |
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| } |