/*
* Copyright 2001,2004 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.jetspeed.portlets.tags;
import java.io.IOException;
import java.net.URLEncoder;
import javax.portlet.PortletConfig;
import javax.portlet.PortletRequest;
import javax.portlet.PortletURL;
import javax.portlet.RenderResponse;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import org.apache.webapp.admin.TreeControl;
import org.apache.webapp.admin.TreeControlNode;
import org.apache.webapp.admin.TreeControlTag;
/**
* @author <a href="mailto:jford@apache.org">Jeremy Ford</a>
*/
public class PortletTreeControlTag extends TreeControlTag
{
private static final String PORTLET_REQUEST = "portlet_request";
private static final String PORTLET_SESSION = "portlet_session";
/**
* The names of tree state images that we need.
*
* Copied from parent
*/
static final String IMAGE_HANDLE_DOWN_LAST = "handledownlast.gif";
static final String IMAGE_HANDLE_DOWN_MIDDLE = "handledownmiddle.gif";
static final String IMAGE_HANDLE_RIGHT_LAST = "handlerightlast.gif";
static final String IMAGE_HANDLE_RIGHT_MIDDLE = "handlerightmiddle.gif";
static final String IMAGE_LINE_LAST = "linelastnode.gif";
static final String IMAGE_LINE_MIDDLE = "linemiddlenode.gif";
static final String IMAGE_LINE_VERTICAL = "linevertical.gif";
public void setScope(String scope) {
if (!PORTLET_REQUEST.equals(scope) &&
!PORTLET_SESSION.equals(scope)
)
{
super.setScope(scope);
}
this.scope = scope;
}
/**
* Return the <code>TreeControl</code> instance for the tree control that
* we are rendering.
*
* @exception JspException if no TreeControl instance can be found
*/
protected TreeControl getTreeControl() throws JspException {
Object treeControl = null;
PortletRequest renderRequest = (PortletRequest) pageContext.findAttribute("javax.portlet.request");
if(PORTLET_REQUEST.equals(scope))
{
treeControl = renderRequest.getAttribute(tree);
}
else if(PORTLET_SESSION.equals(scope))
{
treeControl = renderRequest.getPortletSession().getAttribute(tree);
}
if (treeControl == null)
{
treeControl = super.getTreeControl();
}
return (TreeControl)treeControl;
}
/**
* Render the specified node, as controlled by the specified parameters.
*
* @param out The <code>JspWriter</code> to which we are writing
* @param node The <code>TreeControlNode</code> we are currently
* rendering
* @param level The indentation level of this node in the tree
* @param width Total displayable width of the tree
* @param last Is this the last node in a list?
*
* @exception IOException if an input/output error occurs
*/
protected void render(JspWriter out, TreeControlNode node,
int level, int width, boolean last)
throws IOException {
try
{
HttpServletResponse response =
(HttpServletResponse) pageContext.getResponse();
PortletRequest renderRequest = (PortletRequest)pageContext.getRequest().getAttribute("javax.portlet.request");
RenderResponse renderResponse = (RenderResponse)pageContext.getRequest().getAttribute("javax.portlet.response");
PortletConfig portletConfig = (PortletConfig)pageContext.getRequest().getAttribute("javax.portlet.config");
// if the node is root node and the label value is
// null, then do not render root node in the tree.
if ("ROOT-NODE".equalsIgnoreCase(node.getName()) &&
(node.getLabel() == null)) {
// Render the children of this node
TreeControlNode children[] = node.findChildren();
int lastIndex = children.length - 1;
int newLevel = level + 1;
for (int i = 0; i < children.length; i++) {
render(out, children[i], newLevel, width, i == lastIndex);
}
return;
}
// Render the beginning of this node
out.println(" <tr valign=\"middle\">");
out.print("<td><table cellspacing=\"0\" cellpadding=\"0\" border=\"0\"><tr valign=\"middle\">");
// Create the appropriate number of indents
for (int i = 0; i < level; i++) {
int levels = level - i;
TreeControlNode parent = node;
for (int j = 1; j <= levels; j++)
parent = parent.getParent();
if (parent.isLast())
out.print(" <td> </td>");
else {
out.print(" <td><img src=\"");
out.print(images);
out.print("/");
out.print(IMAGE_LINE_VERTICAL);
out.print("\" alt=\"\" border=\"0\"></td>");
}
out.println();
}
// Render the tree state image for this node
// HACK to take into account special characters like = and &
// in the node name, could remove this code if encode URL
// and later request.getParameter() could deal with = and &
// character in parameter values.
String encodedNodeName = URLEncoder.encode(node.getName());
PortletURL treeActionUrl = renderResponse.createActionURL();
treeActionUrl.setParameter("node", node.getName());
String treeAction = treeActionUrl.toString();
// String action = replace(getAction(), "${name}", encodedNodeName);
// String updateTreeAction =
// replace(getAction(), "tree=${name}", "select=" + encodedNodeName);
// updateTreeAction =
// ((HttpServletResponse) pageContext.getResponse()).
// encodeURL(updateTreeAction);
out.print(" <td>");
//add an anchor so that we can return to this node
out.print("<a name=\"");
out.print(node.getName());
out.print("\">");
if ((action != null) && !node.isLeaf()) {
out.print("<a href=\"");
out.print(response.encodeURL(treeAction));
out.print("\">");
}
out.print("<img src=\"");
out.print(images);
out.print("/");
if (node.isLeaf()) {
if (node.isLast())
out.print(IMAGE_LINE_LAST);
else
out.print(IMAGE_LINE_MIDDLE);
out.print("\" alt=\"");
} else if (node.isExpanded()) {
if (node.isLast())
out.print(IMAGE_HANDLE_DOWN_LAST);
else
out.print(IMAGE_HANDLE_DOWN_MIDDLE);
out.print("\" alt=\"close node");
} else {
if (node.isLast())
out.print(IMAGE_HANDLE_RIGHT_LAST);
else
out.print(IMAGE_HANDLE_RIGHT_MIDDLE);
out.print("\" alt=\"expand node");
}
out.print("\" border=\"0\">");
if ((action != null) && !node.isLeaf())
out.print("</a>");
out.println("</td>");
// Calculate the hyperlink for this node (if any)
String hyperlink = null;
String nodeAction = node.getAction();
if(nodeAction == null && node.isExpandWhenClicked())
{
hyperlink = treeAction;
}
if (nodeAction != null)
{
if(node.getAction().equals("portlet_url"))
{
PortletURL actionUrl = renderResponse.createActionURL();
actionUrl.setParameter("select_node", node.getName());
hyperlink = ((HttpServletResponse) pageContext.getResponse()).encodeURL(actionUrl.toString());
}
else
{
hyperlink = ((HttpServletResponse) pageContext.getResponse()).
encodeURL(node.getAction());
}
}
// Render the icon for this node (if any)
out.print(" <td ");
if(node.getLabel() != null)
{
//make sure text does not wrap
out.print(" style=\"");
out.print("white-space:nowrap; vertical-align:middle;");
out.print("\"");
}
out.print(">");
if (node.getIcon() != null) {
if (hyperlink != null) {
out.print("<a href=\"");
out.print(hyperlink);
out.print("\"");
String target = node.getTarget();
if(target != null) {
out.print(" target=\"");
out.print(target);
out.print("\"");
}
/* Invalid, not used, and not usefull
// to refresh the tree in the same 'self' frame
out.print(" onclick=\"");
out.print("self.location.href='" + updateTreeAction + "'");
out.print("\"");
*/
out.print(">");
}
out.print("<img src=\"");
out.print(images);
out.print("/");
out.print(node.getIcon());
out.print("\" alt=\"");
out.print("\" border=\"0\">");
if (hyperlink != null)
out.print("</a>");
}
// Render the label for this node (if any)
if (node.getLabel() != null) {
String labelStyle = node.getCSSClass();
if (node.isSelected() && (styleSelected != null))
labelStyle = styleSelected;
else if (!node.isSelected() && (styleUnselected != null))
labelStyle = styleUnselected;
if (hyperlink != null) {
// Note the leading space so that the text has some space
// between it and any preceding images
out.print(" <a href=\"");
out.print(hyperlink);
out.print("\"");
String target = node.getTarget();
if(target != null) {
out.print(" target=\"");
out.print(target);
out.print("\"");
}
if (labelStyle != null) {
out.print(" class=\"");
out.print(labelStyle);
out.print("\"");
}
if(node.getTitle() != null)
{
out.print(" title=\"");
out.print(node.getTitle());
out.print("\"");
}
/* Invalid, not used, and not usefull
// to refresh the tree in the same 'self' frame
out.print(" onclick=\"");
out.print("self.location.href='" + updateTreeAction + "'");
out.print("\"");
*/
out.print(">");
} else if (labelStyle != null) {
out.print("<span class=\"");
out.print(labelStyle);
out.print("\">");
}
out.print(node.getLabel());
if (hyperlink != null)
out.print("</a>");
else if (labelStyle != null)
out.print("</span>");
}
out.println("</td>");
// Render the end of this node
out.println(" </tr>");
out.println("</table></td></tr>");
// Render the children of this node
if (node.isExpanded()) {
TreeControlNode children[] = node.findChildren();
int lastIndex = children.length - 1;
int newLevel = level + 1;
for (int i = 0; i < children.length; i++) {
render(out, children[i], newLevel, width, i == lastIndex);
}
}
}
catch(Exception e)
{
out.print(e.getLocalizedMessage());
}
}
}