/*
* Copyright 2012 GWT-Bootstrap
*
* 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 com.github.gwtbootstrap.client.ui;
import java.util.ArrayList;
import java.util.List;
import com.github.gwtbootstrap.client.ui.base.ComplexWidget;
import com.github.gwtbootstrap.client.ui.base.ListItem;
import com.github.gwtbootstrap.client.ui.base.UnorderedList;
import com.github.gwtbootstrap.client.ui.constants.Constants;
import com.google.gwt.dom.client.Document;
import com.google.gwt.user.client.ui.HasText;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.user.client.ui.WidgetCollection;
/**
* The Breadcrumbs container
*
* <p>
* <h3>UiBinder Usage:</h3>
* <p/>
* <pre>
* {@code
* <b:Breadcrumbs>
* <b:NavLink>Home</b:NavLink>
* <b:NavLink>Accoount</b:NavLink>
* </b:Breadcrumbs>
* <b:Breadcrumbs divider=">">
* <b:NavLink>Home</b:NavLink>
* <b:NavLink>Accoount</b:NavLink>
* </b:Breadcrumbs>
* }
*
* @since 2.0.4.0
* @author Dominik Mayer
* @author ohashi keisuke
*/
public class Breadcrumbs extends UnorderedList {
private WidgetCollection children = new WidgetCollection(this);
private final List<Divider> dividerList = new ArrayList<Divider>();
private String divider = "/";
private static class Divider extends ComplexWidget {
public Divider(String divider) {
super("span");
setStyleName(Constants.DIVIDER);
setDivider(divider);
}
public void setDivider(String divider) {
getElement().setInnerText(divider);
}
}
/**
* Create a empty Breadcrumbs
*/
public Breadcrumbs() {
setStyleName(Constants.BREADCRUMB);
}
/**
* Create Breadcrumbs with widgets
* @param widgets widgets
*/
public Breadcrumbs(Widget ... widgets) {
this();
for (Widget widget : widgets) {
this.add(widget);
}
}
/**
* Create Breadcrumbs with setting divider character
* @param divider separate char (ex : ">")
*/
public Breadcrumbs(String divider) {
this();
this.setDivider(divider);
}
/**
* Set separater character
* @param divider separater character
*/
public void setDivider(String divider) {
if(divider == null || divider.isEmpty()) {
this.divider = "/";
} else {
this.divider = divider;
}
for (Divider dividerWidget : dividerList) {
dividerWidget.setDivider(this.divider);
}
}
/**
* {@inheritDoc}
*/
@Override
protected void onAttach() {
if(!isOrWasAttached() && children.size() > 0) {
Widget lastWidget = children.get(children.size() -1);
for (Widget w : children) {
ListItem item = lastWidget.equals(w)
? change2TextListItem(w)
: getOrCreateListItem(w);
super.add(item);
}
}
super.onAttach();
}
/**
* {@inheritDoc}
*/
@Override
public void add(Widget w) {
w.removeStyleName(Constants.ACTIVE);
if(!isOrWasAttached()) {
children.add(w);
return;
}
if(children.size() > 0) {
//Change last widget 2 Link
//pygical remove
super.remove(getWidget(getWidgetCount() -1));
ListItem item = getOrCreateListItem(children.get(children.size() -1));
super.add(item);
}
ListItem newest = change2TextListItem(w);
super.add(newest);
children.add(w);
}
private ListItem getOrCreateListItem(Widget lastWidget) {
ListItem item;
Divider dividerWidget = new Divider(divider);
if(lastWidget instanceof NavWidget) {
NavWidget w = (NavWidget)lastWidget;
if(hasDivier(w)) {
return w;
} else {
dividerList.add(dividerWidget);
w.addWidget(dividerWidget);
return w;
}
} else if(lastWidget instanceof ListItem) {
item = (ListItem)lastWidget;
} else {
item = new ListItem(lastWidget);
}
if(hasDivier(item)) {
return item;
}
item.add(dividerWidget);
dividerList.add(dividerWidget);
return item;
}
private boolean hasDivier(ListItem item) {
for(Widget w : item) {
if(w instanceof Divider) {
return true;
}
}
return false;
}
private ListItem change2TextListItem(Widget w) {
String text;
if (w instanceof HasText) {
text = ((HasText) w).getText();
} else {
text = w.getElement().getInnerText();
}
ListItem newest = new ListItem();
newest.setStyleName(Constants.ACTIVE);
newest.getElement().appendChild(Document.get().createTextNode(text));
return newest;
}
/**
* {@inheritDoc}
*/
@Override
public boolean remove(Widget w) {
if(!isOrWasAttached() && children.contains(w)) {
children.remove(w);
return true;
}
if(getWidgetIndex(w) < 0 && !children.contains(w)) {
return false;
}
if(getWidgetIndex(w) >= 0 && children.contains(w)) {
children.remove(w);
super.remove(w);
} else if(getWidgetIndex(w) >= 0 && !children.contains(w)) {
children.remove(getWidgetIndex(w));
super.remove(w);
} else if(getWidgetIndex(w) < 0 && children.contains(w)) {
return remove(getWidget(children.indexOf(w)));
} else {
return false;
}
boolean isLastWidget = (children.indexOf(w) == children.size() -1) || (getWidgetIndex(w) == getWidgetCount() -1);
if(isLastWidget && getWidgetCount() > 0) {
Widget l = getWidget(getWidgetCount() -1);
super.remove(l);
super.add(change2TextListItem(l));
}
return true;
}
/**
* {@inheritDoc}
*/
@Override
public void clear() {
super.clear();
children = new WidgetCollection(this);
dividerList.clear();
}
}