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| package org.apache.tapestry.form; |
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| import org.apache.hivemind.ApplicationRuntimeException; |
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| import org.apache.tapestry.IForm; |
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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.PageRenderSupport; |
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| import org.apache.tapestry.Tapestry; |
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| import org.apache.tapestry.TapestryUtils; |
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| public abstract class LinkSubmit extends AbstractSubmit |
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| { |
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| public static final String ATTRIBUTE_NAME = "org.apache.tapestry.form.LinkSubmit"; |
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| public static final String ATTRIBUTE_FUNCTION_NAME = "org.apache.tapestry.form.LinkSubmit_function"; |
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| protected boolean isClicked(IRequestCycle cycle, String name)
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| { |
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| String value = cycle.getParameter("_linkSubmit");
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| return value != null && value.equals(name);
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| } |
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| protected void renderFormComponent(IMarkupWriter writer, IRequestCycle cycle)
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| { |
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| boolean disabled = isDisabled();
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| IMarkupWriter wrappedWriter;
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| if (!disabled)
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| { |
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| PageRenderSupport pageRenderSupport = TapestryUtils.getPageRenderSupport(
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| cycle, |
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| this); |
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| if (cycle.getAttribute(ATTRIBUTE_FUNCTION_NAME) == null)
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| { |
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| pageRenderSupport
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| .addBodyScript("function submitLink(form, elementId) { form._linkSubmit.value = elementId; if (form.onsubmit == null || form.onsubmit()) form.submit(); }"); |
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| cycle.setAttribute(ATTRIBUTE_FUNCTION_NAME, this);
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| } |
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| IForm form = getForm();
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| String formName = form.getName();
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| String formHiddenFieldAttributeName = ATTRIBUTE_FUNCTION_NAME + formName;
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| if (cycle.getAttribute(formHiddenFieldAttributeName) == null)
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| { |
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| writer.beginEmpty("input");
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| writer.attribute("type", "hidden");
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| writer.attribute("name", "_linkSubmit");
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| cycle.setAttribute(formHiddenFieldAttributeName, this);
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| } |
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| writer.begin("a");
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| writer.attribute("href", "javascript:submitLink(document." + formName + ",\"" + getName()
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| + "\");"); |
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| wrappedWriter = writer.getNestedWriter();
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| } |
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| else |
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| wrappedWriter = writer;
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| renderBody(wrappedWriter, cycle);
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| if (!disabled)
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| { |
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| renderInformalParameters(writer, cycle);
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| wrappedWriter.close();
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| writer.end();
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| } |
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| } |
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| protected void prepareForRender(IRequestCycle cycle)
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| { |
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| if (cycle.getAttribute(ATTRIBUTE_NAME) != null)
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| throw new ApplicationRuntimeException(Tapestry.getMessage("LinkSubmit.may-not-nest"),
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| this, null, null); |
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| cycle.setAttribute(ATTRIBUTE_NAME, this);
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| } |
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| protected void cleanupAfterRender(IRequestCycle cycle)
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| { |
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| cycle.removeAttribute(ATTRIBUTE_NAME);
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| } |
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| } |