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* Copyright ${year}, Red Hat, Inc. and individual contributors
* by the @authors tag. See the copyright.txt in the distribution for a
* full listing of individual contributors.
*
* This 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 software 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.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.richfaces.component;
import java.util.List;
import java.util.Map;
import javax.el.ELException;
import javax.el.MethodExpression;
import javax.el.ValueExpression;
import javax.faces.FacesException;
import javax.faces.application.FacesMessage;
import javax.faces.component.UIComponent;
import javax.faces.component.UIComponentBase;
import javax.faces.context.FacesContext;
import javax.faces.event.AbortProcessingException;
import javax.faces.event.FacesEvent;
import org.ajax4jsf.component.IterationStateHolder;
import org.richfaces.DataScrollerUtils;
import org.richfaces.application.FacesMessages;
import org.richfaces.application.MessageFactory;
import org.richfaces.application.ServiceTracker;
import org.richfaces.cdk.annotations.Attribute;
import org.richfaces.cdk.annotations.Facet;
import org.richfaces.cdk.annotations.JsfComponent;
import org.richfaces.cdk.annotations.JsfRenderer;
import org.richfaces.cdk.annotations.Tag;
import org.richfaces.cdk.annotations.TagType;
import org.richfaces.component.attribute.AjaxProps;
import org.richfaces.component.attribute.CoreProps;
import org.richfaces.component.util.MessageUtil;
import org.richfaces.event.DataScrollEvent;
import org.richfaces.event.DataScrollListener;
import org.richfaces.event.DataScrollSource;
import org.richfaces.taglib.DataScrollerHandler;
/**
* <p> The <rich:dataScroller> component is used for navigating through multiple pages of tables or grids. </p>
*/
@JsfComponent(type = AbstractDataScroller.COMPONENT_TYPE, family = AbstractDataScroller.COMPONENT_FAMILY,
renderer = @JsfRenderer(type = "org.richfaces.DataScrollerRenderer"),
tag = @Tag(name = "dataScroller", handlerClass = DataScrollerHandler.class, type = TagType.Facelets) )
public abstract class AbstractDataScroller extends UIComponentBase implements DataScrollSource, IterationStateHolder, AjaxProps, CoreProps {
public static final String COMPONENT_TYPE = "org.richfaces.DataScroller";
public static final String COMPONENT_FAMILY = "org.richfaces.DataScroller";
public static final String SCROLLER_STATE_ATTRIBUTE = COMPONENT_TYPE + ":page";
public static final String FIRST_FACET_NAME = "first";
public static final String LAST_FACET_NAME = "last";
public static final String NEXT_FACET_NAME = "next";
public static final String PREVIOUS_FACET_NAME = "previous";
public static final String FAST_FORWARD_FACET_NAME = "fastForward";
public static final String FAST_REWIND_FACET_NAME = "fastRewind";
public static final String FIRST_DISABLED_FACET_NAME = "first_disabled";
public static final String LAST_DISABLED_FACET_NAME = "last_disabled";
public static final String NEXT_DISABLED_FACET_NAME = "next_disabled";
public static final String PREVIOUS_DISABLED_FACET_NAME = "previous_disabled";
public static final String FAST_FORWARD_DISABLED_FACET_NAME = "fastForward_disabled";
public static final String FAST_REWIND_DISABLED_FACET_NAME = "fastRewind_disabled";
public static final String CONTROLS_SEPARATOR_FACET_NAME = "controlsSeparator";
public static final String PAGES_FACET_NAME = "pages";
public static final String PAGEMODE_FULL = "full";
public static final String PAGEMODE_SHORT = "short";
private Integer page;
/**
* If renderIfSinglePage is "true" then datascroller is displayed on condition that the data hold on one page. Default value
* is "true".
*/
@Attribute(defaultValue = "true")
public abstract boolean isRenderIfSinglePage();
/**
* The attribute to control whether last page of datascroller shows "rows" number of items or just the rest. Possible values
* are "full" and "short". Default value is "short".
*/
@Attribute
public abstract String getLastPageMode();
/**
* Maximum quantity of pages. Default value is "10".
*/
@Attribute
public abstract int getMaxPages();
public int getMaxPagesOrDefault() {
int maxPages = getMaxPages();
if (maxPages <= 0) {
maxPages = 10;
}
return maxPages;
}
/**
* The attribute specifies the visibility of boundaryControls. Possible values are: "show" (controls are always visible ).
* "hide" (controls are hidden. "auto" (unnecessary controls are hidden). Default value is "show".
*/
@Attribute
public abstract DataScrollerControlsMode getBoundaryControls();
/**
* The attribute specifies the visibility of fastControls. Possible values are: "show" (controls are always visible ).
* "hide" (controls are hidden. "auto" (unnecessary controls are hidden). Default value is "show".
*/
@Attribute
public abstract DataScrollerControlsMode getFastControls();
/**
* The attribute specifies the visibility of stepControls. Possible values are: "show" (controls are always visible ).
* "hide" (controls are hidden. "auto" (unnecessary controls are hidden). Default value is "show".
*/
@Attribute
public abstract DataScrollerControlsMode getStepControls();
/**
* The attribute indicates pages quantity to switch onto when fast scrolling is used. Default value is "1".
*
* @return
*/
@Attribute
public abstract int getFastStep();
public int getFastStepOrDefault() {
int fastStep = getFastStep();
if (fastStep <= 0) {
fastStep = 1;
}
return fastStep;
}
/**
* Component ID of the table whose data is scrolled
*/
@Attribute
public String getFor() {
return (String) getStateHelper().eval("for");
}
public void setFor(String forId) {
getStateHelper().put("for", forId);
}
@Attribute
public abstract MethodExpression getScrollListener();
public void addScrollListener(DataScrollListener listener) {
addFacesListener(listener);
}
public DataScrollListener[] getScrollListeners() {
return (DataScrollListener[]) getFacesListeners(DataScrollListener.class);
}
public void removeScrollListener(DataScrollListener listener) {
removeFacesListener(listener);
}
public void broadcast(FacesEvent event) throws AbortProcessingException {
if (event instanceof DataScrollEvent) {
DataScrollEvent dataScrollerEvent = (DataScrollEvent) event;
updateModel(dataScrollerEvent.getPage());
FacesContext facesContext = getFacesContext();
UIComponent dataTable = getDataTable();
List<AbstractDataScroller> dataScrollers = DataScrollerUtils.findDataScrollers(dataTable);
for (AbstractDataScroller dataScroller : dataScrollers) {
facesContext.getPartialViewContext().getRenderIds().add(dataScroller.getClientId(facesContext));
}
String dataTableId = null;
if (dataTable instanceof MetaComponentResolver && ! (dataTable instanceof UIDataTableBase && ((UIDataTableBase)dataTable).hasRowChildren())) {
dataTableId = ((MetaComponentResolver) dataTable).resolveClientId(facesContext, dataTable, "body");
}
if (dataTableId == null) {
dataTableId = dataTable.getClientId(facesContext);
}
facesContext.getPartialViewContext().getRenderIds().add(dataTableId);
// add datascroller to render
String dataScrollerId = getClientId(facesContext);
if (!facesContext.getPartialViewContext().getRenderIds().contains(dataScrollerId)) {
facesContext.getPartialViewContext().getRenderIds().add(dataScrollerId);
}
}
super.broadcast(event);
}
/**
* Finds the dataTable which id is mapped to the "for" property
*
* @return the dataTable component
*/
public UIComponent getDataTable() {
return DataScrollerUtils.findDataTable(this);
}
public int getPageForFacet(String facetName) {
if (facetName == null) {
throw new NullPointerException();
}
int newPage = 1;
int pageCount = getPageCount();
if (FIRST_FACET_NAME.equals(facetName)) {
newPage = 1;
} else if (LAST_FACET_NAME.equals(facetName)) {
newPage = pageCount > 0 ? pageCount : 1;
} else if (PREVIOUS_FACET_NAME.equals(facetName)) {
newPage = getPage() - 1;
} else if (NEXT_FACET_NAME.equals(facetName)) {
newPage = getPage() + 1;
} else if (FAST_FORWARD_FACET_NAME.equals(facetName)) {
newPage = getPage() + getFastStepOrDefault();
newPage = newPage < pageCount ? newPage : pageCount;
} else if (FAST_REWIND_FACET_NAME.equals(facetName)) {
newPage = getPage() - getFastStepOrDefault();
newPage = newPage > 0 ? newPage : 1;
} else {
try {
newPage = Integer.parseInt(facetName.toString());
} catch (NumberFormatException e) {
throw new FacesException(e.getLocalizedMessage(), e);
}
}
if (newPage >= 1 && newPage <= pageCount) {
return newPage;
} else {
return 0;
}
}
public int getPageCount(UIComponent data) {
int rowCount = getRowCount(data);
int rows = getRows(data);
return getPageCount(data, rowCount, rows);
}
public int getPageCount(UIComponent data, int rowCount, int rows) {
return DataScrollerUtils.getPageCount(data, rowCount, rows);
}
/** @return the page count of the uidata */
public int getPageCount() {
return getPageCount(getDataTable());
}
public int getRowCount(UIComponent data) {
return (Integer) data.getAttributes().get("rowCount");
}
/** @return int */
public int getRowCount() {
return getRowCount(getDataTable());
}
public int getRows(UIComponent data) {
return DataScrollerUtils.getRows(data);
}
// facet getter methods
@Facet
public UIComponent getFirst() {
return getFacet(FIRST_FACET_NAME);
}
@Facet
public abstract UIComponent getLast();
@Facet
public abstract UIComponent getNext();
@Facet
public abstract UIComponent getPrevious();
@Facet
public abstract UIComponent getFastForward();
@Facet
public abstract UIComponent getFastRewind();
private static boolean isRendered(UIComponent component) {
UIComponent c = component;
while (c != null) {
if (!c.isRendered()) {
return false;
}
c = c.getParent();
}
return true;
}
public void setPage(int newPage) {
this.page = newPage;
}
/**
* If page >= 1 then it's a page number to show
*/
@Attribute
public int getPage() {
UIComponent dataTable = getDataTable();
Map<String, Object> attributes = dataTable.getAttributes();
FacesContext facesContext = getFacesContext();
Integer state = (Integer) attributes.get(dataTable.getClientId(facesContext) + SCROLLER_STATE_ATTRIBUTE);
if (state != null) {
return state;
}
if (this.page != null) {
return page;
}
ValueExpression ve = getValueExpression("page");
if (ve != null) {
try {
Integer pageObject = (Integer) ve.getValue(getFacesContext().getELContext());
if (pageObject != null) {
return pageObject;
}
} catch (ELException e) {
throw new FacesException(e);
}
}
return 1;
}
private MessageFactory getMessageFactory(FacesContext context) {
return ServiceTracker.getService(MessageFactory.class);
}
private void updateModel(int newPage) {
FacesContext facesContext = getFacesContext();
UIComponent dataTable = getDataTable();
if (isRendered(dataTable)) {
dataTable.getAttributes().put("first", (newPage - 1) * getRows(dataTable));
}
Map<String, Object> attributes = dataTable.getAttributes();
attributes.put(dataTable.getClientId(facesContext) + SCROLLER_STATE_ATTRIBUTE, newPage);
ValueExpression ve = getValueExpression("page");
if (ve != null) {
try {
ve.setValue(facesContext.getELContext(), newPage);
attributes.remove(dataTable.getClientId(facesContext) + SCROLLER_STATE_ATTRIBUTE);
} catch (ELException e) {
String messageStr = e.getMessage();
Throwable result = e.getCause();
while (null != result && result.getClass().isAssignableFrom(ELException.class)) {
messageStr = result.getMessage();
result = result.getCause();
}
FacesMessage message;
if (null == messageStr) {
message = ServiceTracker.getService(MessageFactory.class).createMessage(facesContext,
FacesMessages.UIINPUT_UPDATE, MessageUtil.getLabel(facesContext, this));
} else {
message = new FacesMessage(FacesMessage.SEVERITY_ERROR, messageStr, messageStr);
}
facesContext.getExternalContext().log(message.getSummary(), result);
facesContext.addMessage(getClientId(facesContext), message);
facesContext.renderResponse();
} catch (IllegalArgumentException e) {
FacesMessage message = ServiceTracker.getService(MessageFactory.class).createMessage(facesContext,
FacesMessages.UIINPUT_UPDATE, MessageUtil.getLabel(facesContext, this));
facesContext.getExternalContext().log(message.getSummary(), e);
facesContext.addMessage(getClientId(facesContext), message);
facesContext.renderResponse();
} catch (Exception e) {
FacesMessage message = ServiceTracker.getService(MessageFactory.class).createMessage(facesContext,
FacesMessages.UIINPUT_UPDATE, MessageUtil.getLabel(facesContext, this));
facesContext.getExternalContext().log(message.getSummary(), e);
facesContext.addMessage(getClientId(facesContext), message);
facesContext.renderResponse();
}
}
}
public boolean isLocalPageSet() {
return page != null;
}
public void resetLocalPage() {
page = null;
}
public Object getIterationState() {
return this.page;
}
public void setIterationState(Object state) {
this.page = (Integer) state;
}
}