/
ConditionUtil.java
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/
ConditionUtil.java
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/*
* Copyright 2004-2011 the Seasar Foundation and the Others.
*
* 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.seasar.teeda.extension.util;
import java.io.IOException;
import java.util.ArrayList;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import javax.faces.component.UIComponent;
import javax.faces.component.UIForm;
import javax.faces.context.FacesContext;
import javax.faces.context.ResponseWriter;
import javax.faces.internal.scope.PageScope;
import org.seasar.teeda.core.JsfConstants;
import org.seasar.teeda.core.render.Base64EncodeConverter;
import org.seasar.teeda.core.util.JavaScriptPermissionUtil;
import org.seasar.teeda.extension.ExtensionConstants;
import org.seasar.teeda.extension.component.UIBody;
import org.seasar.teeda.extension.render.RendererListener;
import org.seasar.teeda.extension.render.TBodyRenderer;
/**
* @author koichik
*/
public class ConditionUtil {
public static final String KEY = "org.seasar.teeda.extension.Condition";
public static Boolean getCondition(final FacesContext context,
final String clientId) {
final Map conditions = getConditions(context);
if (conditions == null) {
return null;
}
return (Boolean) conditions.get(clientId);
}
public static void addCondition(final FacesContext context,
final String clientId, final boolean value) {
final Map conditions = getOrCreateConditions(context);
conditions.put(clientId, Boolean.valueOf(value));
}
public static Boolean removeCondition(final FacesContext context,
final String clientId) {
final Map conditions = getConditions(context);
if (conditions == null) {
return null;
}
return (Boolean) conditions.remove(clientId);
}
public static Map getConditions(final FacesContext context) {
final Map map = PageScope.getContext(context);
if (map == null) {
return null;
}
return (Map) map.get(KEY);
}
public static Map getOrCreateConditions(final FacesContext context) {
final Map map = PageScope.getOrCreateContext(context);
Map conditions = (Map) map.get(KEY);
if (conditions == null) {
conditions = new LinkedHashMap(128);
map.put(KEY, conditions);
}
return conditions;
}
public static void setConditions(final FacesContext context,
final Map conditions) {
final Map map = PageScope.getOrCreateContext(context);
map.put(KEY, conditions);
}
public static void removeConditions(final FacesContext context) {
final Map map = PageScope.getContext(context);
if (map != null) {
map.remove(KEY);
}
}
public static List getForms(final FacesContext context) {
final Map map = context.getExternalContext().getRequestMap();
final List forms = (List) map.get(KEY);
return forms;
}
public static void addForm(final FacesContext context, final UIForm form) {
final Map map = context.getExternalContext().getRequestMap();
List forms = (List) map.get(KEY);
if (forms == null) {
forms = new ArrayList();
map.put(KEY, forms);
registerRendererListener(form.getParent());
}
forms.add(context.getExternalContext().encodeNamespace(form.getId()));
}
protected static void registerRendererListener(UIComponent component) {
while (component != null) {
if (component instanceof UIBody) {
TBodyRenderer.addRendererListener(((UIBody) component),
new ConditionRendererListener());
break;
}
component = component.getParent();
}
}
public static class ConditionRendererListener implements RendererListener {
public void renderBeforeBodyEnd(final FacesContext context)
throws IOException {
if (!JavaScriptPermissionUtil.isJavaScriptPermitted(context)) {
return;
}
final Map conditions = getConditions(context);
if (conditions == null || conditions.isEmpty()) {
return;
}
final List forms = getForms(context);
if (forms == null || forms.isEmpty()) {
return;
}
renderJavascript(context.getResponseWriter(), conditions, forms);
}
protected static void renderJavascript(final ResponseWriter writer,
final Map conditions, final List forms) throws IOException {
writer.write(JsfConstants.LINE_SP);
writer.startElement(JsfConstants.SCRIPT_ELEM, null);
writer.writeAttribute(JsfConstants.LANGUAGE_ATTR,
JsfConstants.JAVASCRIPT_VALUE, null);
writer.writeAttribute(JsfConstants.TYPE_ATTR,
JsfConstants.TEXT_JAVASCRIPT_VALUE, null);
writer.write(JsfConstants.LINE_SP);
writer.write("<!--");
writer.write(JsfConstants.LINE_SP);
writer.write("var forms = [");
for (int i = 0; i < forms.size(); ++i) {
final String form = (String) forms.get(i);
writer.write("'");
writer.write(form);
writer.write("'");
if (i < forms.size() - 1) {
writer.write(", ");
}
}
writer.write("];");
writer.write(JsfConstants.LINE_SP);
writer.write("for (var i = 0, len = forms.length; i < len; ++i) {");
writer.write(JsfConstants.LINE_SP);
writer.write(" var span = document.createElement('span');");
writer.write(JsfConstants.LINE_SP);
writer.write(" span.style.display = 'none';");
writer.write(JsfConstants.LINE_SP);
writer.write(" span.style.position = 'absolute';");
writer.write(JsfConstants.LINE_SP);
writer.write(" var form = document.getElementById(forms[i]);");
writer.write(JsfConstants.LINE_SP);
writer.write(" form.appendChild(span);");
writer.write(JsfConstants.LINE_SP);
writer.write(" span.innerHTML = \"<input type='hidden' name='");
writer.write(ExtensionConstants.CONDITIONS_PARAMETER);
writer.write("' value='");
final Base64EncodeConverter converter = new Base64EncodeConverter();
final String value = converter.getAsEncodeString(conditions);
writer.write(value);
writer.write("' />\";");
writer.write(JsfConstants.LINE_SP);
writer.write("}");
writer.write(JsfConstants.LINE_SP);
writer.write(JsfConstants.LINE_SP);
writer.write("//-->");
writer.write(JsfConstants.LINE_SP);
writer.endElement(JsfConstants.SCRIPT_ELEM);
}
}
}