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30 day Evaluation Version distributed via the Maven Jar Repository. Clover is not free. You have 30 days to evaluate it. Please visit http://www.thecortex.net/clover to obtain a licensed version of Clover | |||||||||||||||||||
Source file | Conditionals | Statements | Methods | TOTAL | |||||||||||||||
LinkSubmit.java | 0% | 0% | 0% | 0% |
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// Copyright 2004, 2005 The Apache Software Foundation
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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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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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/**
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* Implements a component that submits its enclosing form via a JavaScript link. [ <a
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* href="../../../../../ComponentReference/LinkSubmit.html">Component Reference </a>]
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*
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* @author Richard Lewis-Shell
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*/
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public abstract class LinkSubmit extends AbstractSubmit |
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{ |
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/**
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* The name of an {@link org.apache.tapestry.IRequestCycle}attribute in which the current
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* submit link is stored. LinkSubmits do not nest.
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*/
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public static final String ATTRIBUTE_NAME = "org.apache.tapestry.form.LinkSubmit"; |
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/**
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* The name of an {@link org.apache.tapestry.IRequestCycle}attribute in which the link submit
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* component that generates the javascript function is stored. The function is only required
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* once per page (containing a form with a non-disabled LinkSubmit)
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*/
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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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// How to know which Submit link was actually
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// clicked? When submitted, it sets its elementId into a hidden field
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String value = cycle.getParameter("_linkSubmit");
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// If the value isn't the elementId of this component, then this link wasn't
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// selected.
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return value != null && value.equals(name); |
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} |
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protected void writeTag(IMarkupWriter writer, IRequestCycle cycle, String name) |
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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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// make sure the submit function is on the page (once)
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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(cycle); |
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String formName = form.getName(); |
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// one hidden field per form:
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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 + ",\"" + name |
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+ "\");");
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// Allow the wrapped components a chance to render.
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// Along the way, they may interact with this component
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// and cause the name variable to get set.
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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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// Generate additional attributes from informal parameters.
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renderInformalParameters(writer, cycle); |
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// Dump in HTML provided by wrapped components
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wrappedWriter.close(); |
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// Close the <a> tag
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writer.end(); |
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} |
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} |
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protected void renderComponent(IMarkupWriter writer, 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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try
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{ |
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super.renderComponent(writer, cycle);
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} |
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finally
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{ |
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cycle.removeAttribute(ATTRIBUTE_NAME); |
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} |
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} |
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} |
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