/*
* This library is part of OpenCms -
* the Open Source Content Management System
*
* Copyright (c) Alkacon Software GmbH (http://www.alkacon.com)
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* For further information about Alkacon Software GmbH, please see the
* company website: http://www.alkacon.com
*
* For further information about OpenCms, please see the
* project website: http://www.opencms.org
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package org.opencms.jsp;
import org.opencms.file.CmsObject;
import org.opencms.file.CmsProperty;
import org.opencms.file.CmsResource;
import org.opencms.file.CmsResourceFilter;
import org.opencms.main.CmsException;
import org.opencms.main.CmsLog;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import org.apache.commons.logging.Log;
/**
* Bean to provide a convenient way to build navigation structures based on the
* <code>{@link org.opencms.jsp.CmsJspNavElement}</code>.<p>
*
* Use this together with the <code>{@link org.opencms.jsp.CmsJspActionElement}</code>
* to obtain navigation information based on the current users permissions.
* For example, use <code>{@link #getNavigationForFolder(String)}</code> and pass the
* value of the current OpenCms user context uri obtained
* from <code>{@link org.opencms.file.CmsRequestContext#getUri()}</code> as argument to obtain a list
* of all items in the navigation of the current folder. Then use a simple scriptlet to
* iterate over these items and create a HTML navigation.<p>
*
* @since 6.0.0
*
* @see org.opencms.jsp.CmsJspNavElement
*/
public class CmsJspNavBuilder {
/** The log object for this class. */
private static final Log LOG = CmsLog.getLog(CmsJspNavBuilder.class);
/** The current CMS context. */
protected CmsObject m_cms;
/** The current request URI. */
protected String m_requestUri;
/** The current request folder. */
protected String m_requestUriFolder;
/**
* Empty constructor, so that this bean can be initialized from a JSP.<p>
*/
public CmsJspNavBuilder() {
// empty
}
/**
* Default constructor.<p>
*
* @param cms context provider for the current request
*/
public CmsJspNavBuilder(CmsObject cms) {
init(cms);
}
/**
* Returns the full name (including VFS path) of the default file for this navigation element
* or <code>null</code> if the navigation element is not a folder.<p>
*
* The default file of a folder is determined by the value of the property
* <code>default-file</code> or the system wide property setting.<p>
*
* @param cms the CMS object
* @param folder full name of the folder
*
* @return the name of the default file
*
* @deprecated use {@link CmsObject#readDefaultFile(String)} instead
*/
@Deprecated
public static String getDefaultFile(CmsObject cms, String folder) {
if (folder.endsWith("/")) {
try {
CmsResource defaultFile = cms.readDefaultFile(folder);
if (defaultFile != null) {
return cms.getSitePath(defaultFile);
}
} catch (CmsException e) {
LOG.debug(e.getLocalizedMessage(), e);
}
return folder;
}
return null;
}
/**
* Collect all navigation elements from the files in the given folder,
* navigation elements are of class {@link CmsJspNavElement}.<p>
*
* @param cms context provider for the current request
* @param folder the selected folder
*
* @return a sorted (ascending to navigation position) list of navigation elements
*
* @deprecated use {@link #getNavigationForFolder(String)} instead
*/
@Deprecated
public static List<CmsJspNavElement> getNavigationForFolder(CmsObject cms, String folder) {
return new CmsJspNavBuilder(cms).getNavigationForFolder(folder);
}
/**
* Build a navigation for the folder that is either minus levels up
* from the given folder, or that is plus levels down from the
* root folder towards the given folder.<p>
*
* If level is set to zero the root folder is used by convention.<p>
*
* @param cms context provider for the current request
* @param folder the selected folder
* @param level if negative, walk this many levels up, if positive, walk this many
* levels down from root folder
*
* @return a sorted (ascending to navigation position) list of navigation elements
*
* @deprecated use {@link #getNavigationForFolder(String, int)} instead
*/
@Deprecated
public static List<CmsJspNavElement> getNavigationForFolder(CmsObject cms, String folder, int level) {
return new CmsJspNavBuilder(cms).getNavigationForFolder(folder, level);
}
/**
* Returns a navigation element for the named resource.<p>
*
* @param cms context provider for the current request
* @param resource the resource name to get the navigation information for,
* must be a full path name, e.g. "/docs/index.html"
*
* @return a navigation element for the given resource
*
* @deprecated use {@link #getNavigationForResource(String)} instead
*/
@Deprecated
public static CmsJspNavElement getNavigationForResource(CmsObject cms, String resource) {
return new CmsJspNavBuilder(cms).getNavigationForResource(resource);
}
/**
* Builds a tree navigation for the folders between the provided start and end level.<p>
*
* A tree navigation includes all navigation elements that are required to display a tree structure.
* However, the data structure is a simple list.
* Each of the navigation elements in the list has the {@link CmsJspNavElement#getNavTreeLevel()} set
* to the level it belongs to. Use this information to distinguish between the navigation levels.<p>
*
* @param cms context provider for the current request
* @param folder the selected folder
* @param startlevel the start level
* @param endlevel the end level
*
* @return a sorted list of navigation elements with the navigation tree level property set
*
* @deprecated use {@link #getNavigationForResource(String)} instead
*/
@Deprecated
public static List<CmsJspNavElement> getNavigationTreeForFolder(
CmsObject cms,
String folder,
int startlevel,
int endlevel) {
return new CmsJspNavBuilder(cms).getNavigationTreeForFolder(folder, startlevel, endlevel);
}
/**
* This method builds a complete navigation tree with entries of all branches
* from the specified folder.<p>
*
* For an unlimited depth of the navigation (i.e. no <code>endLevel</code>),
* set the <code>endLevel</code> to a value < 0.<p>
*
*
* @param cms the current CMS context
* @param folder the root folder of the navigation tree
* @param endLevel the end level of the navigation
*
* @return list of navigation elements, in depth first order
*
* @deprecated use {@link #getNavigationForResource(String)} instead
*/
@Deprecated
public static List<CmsJspNavElement> getSiteNavigation(CmsObject cms, String folder, int endLevel) {
return new CmsJspNavBuilder(cms).getSiteNavigation(folder, endLevel);
}
/**
* Build a "bread crumb" path navigation to the current folder.<p>
*
* @return ArrayList sorted list of navigation elements
*
* @see #getNavigationBreadCrumb(String, int, int, boolean)
*/
public List<CmsJspNavElement> getNavigationBreadCrumb() {
return getNavigationBreadCrumb(m_requestUriFolder, 0, -1, true);
}
/**
* Build a "bread crumb" path navigation to the current folder.<p>
*
* @param startlevel the start level, if negative, go down |n| steps from selected folder
* @param currentFolder include the selected folder in navigation or not
*
* @return sorted list of navigation elements
*
* @see #getNavigationBreadCrumb(String, int, int, boolean)
*/
public List<CmsJspNavElement> getNavigationBreadCrumb(int startlevel, boolean currentFolder) {
return getNavigationBreadCrumb(m_requestUriFolder, startlevel, -1, currentFolder);
}
/**
* Build a "bread crumb" path navigation to the current folder.<p>
*
* @param startlevel the start level, if negative, go down |n| steps from selected folder
* @param endlevel the end level, if -1, build navigation to selected folder
*
* @return sorted list of navigation elements
*
* @see #getNavigationBreadCrumb(String, int, int, boolean)
*/
public List<CmsJspNavElement> getNavigationBreadCrumb(int startlevel, int endlevel) {
return getNavigationBreadCrumb(m_requestUriFolder, startlevel, endlevel, true);
}
/**
* Build a "bread crumb" path navigation to the given folder.<p>
*
* The <code>startlevel</code> marks the point where the navigation starts from, if negative,
* the count of steps to go down from the given folder.<p>
*
* The <code>endlevel</code> is the maximum level of the navigation path, set it to -1 to build the
* complete navigation to the given folder.<p>
*
* You can include the given folder in the navigation by setting <code>currentFolder</code> to
* <code>true</code>, otherwise <code>false</code>.<p>
*
* @param folder the selected folder
* @param startlevel the start level, if negative, go down |n| steps from selected folder
* @param endlevel the end level, if -1, build navigation to selected folder
* @param currentFolder include the selected folder in navigation or not
*
* @return sorted list of navigation elements
*/
public List<CmsJspNavElement> getNavigationBreadCrumb(
String folder,
int startlevel,
int endlevel,
boolean currentFolder) {
List<CmsJspNavElement> result = new ArrayList<CmsJspNavElement>();
int level = CmsResource.getPathLevel(folder);
// decrease folder level if current folder is not displayed
if (!currentFolder) {
level -= 1;
}
// check current level and change endlevel if it is higher or -1
if ((level < endlevel) || (endlevel == -1)) {
endlevel = level;
}
// if startlevel is negative, display only |startlevel| links
if (startlevel < 0) {
startlevel = endlevel + startlevel + 1;
if (startlevel < 0) {
startlevel = 0;
}
}
// create the list of navigation elements
for (int i = startlevel; i <= endlevel; i++) {
String navFolder = CmsResource.getPathPart(folder, i);
CmsJspNavElement e = getNavigationForResource(navFolder);
// add element to list
result.add(e);
}
return result;
}
/**
* Collect all navigation elements from the files of the folder of the current request URI.<p>
*
* @return a sorted (ascending to navigation position) list of navigation elements
*/
public List<CmsJspNavElement> getNavigationForFolder() {
return getNavigationForFolder(m_requestUriFolder);
}
/**
* Build a navigation for the folder that is either minus levels up
* from of the folder of the current request URI, or that is plus levels down from the
* root folder towards the current request URI.<p>
*
* If level is set to zero the root folder is used by convention.<p>
*
* @param level if negative, walk this many levels up, if positive, walk this many
* levels down from root folder
* @return a sorted (ascending to navigation position) list of navigation elements
*/
public List<CmsJspNavElement> getNavigationForFolder(int level) {
return getNavigationForFolder(m_requestUriFolder, level);
}
/**
* Collect all navigation visible elements from the files in the given folder.<p>
*
* @param folder the selected folder
*
* @return A sorted (ascending to navigation position) list of navigation elements
*/
public List<CmsJspNavElement> getNavigationForFolder(String folder) {
return getNavigationForFolder(folder, false, CmsResourceFilter.DEFAULT);
}
/**
* Collect all navigation elements from the files in the given folder.<p>
*
* @param folder the selected folder
* @param includeInvisible <code>true</code> to include elements not visible in navigation
* @param resourceFilter the filter to use reading the resources
*
* @return A sorted (ascending to navigation position) list of navigation elements
*/
public List<CmsJspNavElement> getNavigationForFolder(
String folder,
boolean includeInvisible,
CmsResourceFilter resourceFilter) {
folder = CmsResource.getFolderPath(folder);
List<CmsJspNavElement> result = new ArrayList<CmsJspNavElement>();
List<CmsResource> resources;
try {
resources = m_cms.getResourcesInFolder(folder, resourceFilter);
} catch (Exception e) {
// should never happen
LOG.error(e.getLocalizedMessage(), e);
return Collections.<CmsJspNavElement> emptyList();
}
for (CmsResource r : resources) {
CmsJspNavElement element = getNavigationForResource(m_cms.getSitePath(r), resourceFilter);
if ((element != null) && (includeInvisible || element.isInNavigation())) {
result.add(element);
}
}
Collections.sort(result);
return result;
}
/**
* Build a navigation for the folder that is either minus levels up
* from the given folder, or that is plus levels down from the
* root folder towards the given folder.<p>
*
* If level is set to zero the root folder is used by convention.<p>
*
* @param folder the selected folder
* @param level if negative, walk this many levels up, if positive, walk this many
* levels down from root folder
*
* @return a sorted (ascending to navigation position) list of navigation elements
*/
public List<CmsJspNavElement> getNavigationForFolder(String folder, int level) {
folder = CmsResource.getFolderPath(folder);
// If level is one just use root folder
if (level == 0) {
return getNavigationForFolder("/");
}
String navfolder = CmsResource.getPathPart(folder, level);
// If navigation folder found use it to build navigation
if (navfolder != null) {
return getNavigationForFolder(navfolder);
}
// Nothing found, return empty list
return Collections.<CmsJspNavElement> emptyList();
}
/**
* Returns a navigation element for the resource of the current request URI.<p>
*
* @return a navigation element for the resource of the current request URI
*/
public CmsJspNavElement getNavigationForResource() {
return getNavigationForResource(m_requestUri);
}
/**
* Returns a navigation element for the named resource.<p>
*
* @param sitePath the resource name to get the navigation information for,
* must be a full path name, e.g. "/docs/index.html"
*
* @return a navigation element for the given resource
*/
public CmsJspNavElement getNavigationForResource(String sitePath) {
return getNavigationForResource(sitePath, CmsResourceFilter.DEFAULT, false);
}
/**
* Returns a navigation element for the named resource.<p>
*
* @param sitePath the resource name to get the navigation information for,
* must be a full path name, e.g. "/docs/index.html"
* @param includeExpired <code>true</code> if expired resources should be included
*
* @return a navigation element for the given resource
*/
public CmsJspNavElement getNavigationForResource(String sitePath, CmsResourceFilter includeExpired) {
return getNavigationForResource(sitePath, includeExpired, false);
}
/**
* Builds a tree navigation for the folders between the provided start and end level.<p>
*
* @param startlevel the start level
* @param endlevel the end level
*
* @return a sorted list of navigation elements with the navigation tree level property set
*
* @see #getNavigationTreeForFolder(String, int, int)
*/
public List<CmsJspNavElement> getNavigationTreeForFolder(int startlevel, int endlevel) {
return getNavigationTreeForFolder(m_requestUriFolder, startlevel, endlevel);
}
/**
* Builds a tree navigation for the folders between the provided start and end level.<p>
*
* @param folder the selected folder
* @param startlevel the start level
* @param endlevel the end level
*
* @return a sorted list of navigation elements with the navigation tree level property set
*/
public List<CmsJspNavElement> getNavigationTreeForFolder(String folder, int startlevel, int endlevel) {
folder = CmsResource.getFolderPath(folder);
// Make sure start and end level make sense
if (endlevel < startlevel) {
return Collections.<CmsJspNavElement> emptyList();
}
int currentlevel = CmsResource.getPathLevel(folder);
if (currentlevel < endlevel) {
endlevel = currentlevel;
}
if (startlevel == endlevel) {
return getNavigationForFolder(CmsResource.getPathPart(folder, startlevel), startlevel);
}
List<CmsJspNavElement> result = new ArrayList<CmsJspNavElement>();
float parentcount = 0;
for (int i = startlevel; i <= endlevel; i++) {
String currentfolder = CmsResource.getPathPart(folder, i);
List<CmsJspNavElement> entries = getNavigationForFolder(currentfolder);
// Check for parent folder
if (parentcount > 0) {
for (CmsJspNavElement e : entries) {
e.setNavPosition(e.getNavPosition() + parentcount);
}
}
// Add new entries to result
result.addAll(entries);
Collections.sort(result);
// Finally spread the values of the navigation items so that there is enough room for further items
float pos = 0;
int count = 0;
String nextfolder = CmsResource.getPathPart(folder, i + 1);
parentcount = 0;
for (CmsJspNavElement e : result) {
pos = 10000 * (++count);
e.setNavPosition(pos);
if (e.getResourceName().startsWith(nextfolder)) {
parentcount = pos;
}
}
if (parentcount == 0) {
parentcount = pos;
}
}
return result;
}
/**
* This method builds a complete site navigation tree with entries of all branches.<p>
*
* @see #getSiteNavigation(String, int)
*
* @return list of navigation elements, in depth first order
*/
public List<CmsJspNavElement> getSiteNavigation() {
return getSiteNavigation("/", -1);
}
/**
* This method builds a complete navigation tree with entries of all branches
* from the specified folder.<p>
*
* @param folder folder the root folder of the navigation tree
* @param endLevel the end level of the navigation
*
* @return list of navigation elements, in depth first order
*/
public List<CmsJspNavElement> getSiteNavigation(String folder, int endLevel) {
// check if a specific end level was given, if not, build the complete navigation
boolean noLimit = false;
if (endLevel < 0) {
noLimit = true;
}
List<CmsJspNavElement> list = new ArrayList<CmsJspNavElement>();
// get the navigation for this folder
List<CmsJspNavElement> curnav = getNavigationForFolder(folder);
// loop through all navigation entries
for (CmsJspNavElement ne : curnav) {
// add the navigation entry to the result list
list.add(ne);
// check if navigation entry is a folder and below the max level -> if so, get the navigation from this folder as well
if (ne.isFolderLink() && (noLimit || (ne.getNavTreeLevel() < endLevel))) {
List<CmsJspNavElement> subnav = getSiteNavigation(ne.getResourceName(), endLevel);
// copy the result of the subfolder to the result list
list.addAll(subnav);
}
}
return list;
}
/**
* Initializes this bean.<p>
*
* @param cms the current cms context
*/
public void init(CmsObject cms) {
m_cms = cms;
m_requestUri = m_cms.getRequestContext().getUri();
m_requestUriFolder = CmsResource.getFolderPath(m_requestUri);
}
/**
* Collect all navigation elements from the files in the given folder.<p>
*
* @param folder the selected folder
* @param includeInvisible <code>true</code> to include elements not visible in navigation
* @param resourceFilter the filter to use reading the resources
* @param shallow <code>true</code> for a shallow look up, not regarding next level resources
*
* @return A sorted (ascending to navigation position) list of navigation elements
*/
private List<CmsJspNavElement> getNavigationForFolder(
String folder,
boolean includeInvisible,
CmsResourceFilter resourceFilter,
boolean shallow) {
folder = CmsResource.getFolderPath(folder);
List<CmsJspNavElement> result = new ArrayList<CmsJspNavElement>();
List<CmsResource> resources;
try {
resources = m_cms.getResourcesInFolder(folder, resourceFilter);
} catch (Exception e) {
// should never happen
LOG.error(e.getLocalizedMessage(), e);
return Collections.<CmsJspNavElement> emptyList();
}
for (CmsResource r : resources) {
CmsJspNavElement element = getNavigationForResource(m_cms.getSitePath(r), resourceFilter, shallow);
if ((element != null) && (includeInvisible || element.isInNavigation())) {
result.add(element);
}
}
Collections.sort(result);
return result;
}
/**
* Returns a navigation element for the named resource.<p>
*
* @param sitePath the resource name to get the navigation information for,
* must be a full path name, e.g. "/docs/index.html"
* @param resourceFilter the filter to use reading the resources
* @param shallow <code>true</code> for a shallow look up, not regarding next level resources
*
* @return a navigation element for the given resource
*/
private CmsJspNavElement getNavigationForResource(String sitePath, CmsResourceFilter resourceFilter, boolean shallow) {
CmsResource resource;
Map<String, String> propertiesMap;
int level = CmsResource.getPathLevel(sitePath);
if (sitePath.endsWith("/")) {
level--;
}
try {
resource = m_cms.readResource(sitePath, resourceFilter);
List<CmsProperty> properties = m_cms.readPropertyObjects(resource, false);
propertiesMap = CmsProperty.toMap(properties);
if (resource.isFolder()) {
if (!sitePath.endsWith("/")) {
sitePath = sitePath + "/";
}
}
} catch (Exception e) {
// should never happen
LOG.error(e.getLocalizedMessage(), e);
return null;
}
return new CmsJspNavElement(sitePath, resource, propertiesMap, level);
}
}