| // Copyright 2006-2013 The Apache Software Foundation |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| |
| package org.apache.tapestry5.corelib.components; |
| |
| import java.util.List; |
| import java.util.Set; |
| |
| import org.apache.tapestry5.BindingConstants; |
| import org.apache.tapestry5.MarkupWriter; |
| import org.apache.tapestry5.SymbolConstants; |
| import org.apache.tapestry5.ValidationTracker; |
| import org.apache.tapestry5.annotations.Environmental; |
| import org.apache.tapestry5.annotations.Parameter; |
| import org.apache.tapestry5.ioc.annotations.Inject; |
| import org.apache.tapestry5.ioc.annotations.Symbol; |
| import org.apache.tapestry5.ioc.internal.util.CollectionFactory; |
| import org.apache.tapestry5.services.ComponentOverride; |
| import org.apache.tapestry5.services.javascript.JavaScriptSupport; |
| |
| /** |
| * Standard validation error presenter. Must be enclosed by a |
| * {@link org.apache.tapestry5.corelib.components.Form} component. If errors are present, renders a |
| * {@code <div>} element around a banner message and around an unnumbered list of |
| * error messages. Renders nothing if the {@link org.apache.tapestry5.ValidationTracker} shows no |
| * errors. |
| * |
| * @tapestrydoc |
| * @see Form |
| */ |
| //@Import(module = "bootstrap/alert") |
| public class Errors |
| { |
| /** |
| * The banner message displayed above the errors. The default value is "You must correct the |
| * following errors before |
| * you may continue.". |
| */ |
| @Parameter("message:core-default-error-banner") |
| private String banner; |
| |
| /** |
| * If true, then only errors global to the form (unassociated with any specific field) are |
| * presented. By default all errors (associated with fields, or not) are presented; with unassociated |
| * errors presented first. |
| * |
| * @since 5.4 |
| */ |
| @Parameter |
| private boolean globalOnly; |
| |
| /** |
| * The CSS class for the div element rendered by the component. |
| */ |
| @Parameter(name = "class", defaultPrefix = BindingConstants.LITERAL, value = "symbol:" + SymbolConstants.ERRORS_DEFAULT_CLASS_PARAMETER_VALUE) |
| private String className; |
| |
| // Allow null so we can generate a better error message if missing |
| @Environmental(false) |
| private ValidationTracker tracker; |
| |
| @Inject |
| @Symbol(SymbolConstants.ERRORS_BASE_CSS_CLASS) |
| private String baseCssClass; |
| |
| @Inject |
| @Symbol(SymbolConstants.ERRORS_CLOSE_BUTTON_CSS_CLASS) |
| private String closeButtonCssClass; |
| |
| @Inject |
| private JavaScriptSupport javaScriptSupport; |
| |
| boolean beginRender(MarkupWriter writer) |
| { |
| if (tracker == null) |
| throw new RuntimeException("The Errors component must be enclosed by a Form component."); |
| |
| if (!tracker.getHasErrors()) |
| { |
| return false; |
| } |
| |
| List<String> errors = |
| globalOnly ? tracker.getUnassociatedErrors() : tracker.getErrors(); |
| |
| if (errors.isEmpty()) |
| { |
| return false; |
| } |
| |
| setUpJavaScript(); |
| |
| Set<String> previousErrors = CollectionFactory.newSet(); |
| |
| writer.element("div", "class", baseCssClass + " " + className); |
| writer.element("button", |
| "type", "button", |
| "class", closeButtonCssClass, |
| "data-dismiss", "alert"); |
| writer.writeRaw("×"); |
| writer.end(); |
| |
| writer.element("h4"); |
| writer.writeRaw(banner); |
| writer.end(); |
| |
| writer.element("ul"); |
| |
| for (String message : errors) |
| { |
| if (previousErrors.contains(message)) |
| { |
| continue; |
| } |
| |
| writer.element("li"); |
| writer.write(message); |
| writer.end(); |
| |
| previousErrors.add(message); |
| } |
| |
| writer.end(); // ul |
| |
| writer.end(); // div |
| |
| return false; |
| } |
| |
| /** |
| * Hook to set up JavaScript, specifically for handling the close button. |
| * Method intended to be overriden when Bootstrap isn't being used. |
| * This implementation calls <code>javaScriptSupport.require("bootstrap/alert");</code>. |
| * @since 5.5 |
| * @see ComponentOverride |
| */ |
| protected void setUpJavaScript() { |
| javaScriptSupport.require("bootstrap/alert"); |
| } |
| |
| } |