// Copyright 2012 Google Inc. All Rights Reserved.
//
// 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.google.collide.client.ui.list;
import com.google.collide.client.ui.list.SimpleList.ListEventDelegate;
import com.google.collide.client.ui.list.SimpleList.ListItemRenderer;
import com.google.collide.client.ui.list.SimpleList.View;
import com.google.collide.client.util.Elements;
import elemental.html.AnchorElement;
import elemental.html.Element;
import elemental.html.UListElement;
/**
* Sidebar list item renderer. It is meant to render anchor tags which include an
* href. Feel free to set the href to javascript:; if that functionality is unneeded.
*
* @param <M> The underlying data type
*/
public class SidebarListItemRenderer<M> extends ListItemRenderer<M> {
public static <M> SimpleList<M> create(
SimpleList.Resources res, LinkRenderer<M> renderer, ListEventDelegate<M> delegate) {
UListElement container = (UListElement) Elements.createElement("ul");
return create(container, res, renderer, delegate);
}
public static <M> SimpleList<M> create(UListElement container, SimpleList.Resources res,
LinkRenderer<M> renderer, ListEventDelegate<M> delegate) {
SimpleList.View view = (View) container;
ListItemRenderer<M> itemRenderer =
new SidebarListItemRenderer<M>(res.sidebarListCss(), renderer);
return SimpleList.create(view, res.sidebarListCss(), itemRenderer, delegate);
}
/**
* A renderer which can provide the details for rendering an anchor tag.
*/
public interface LinkRenderer<M> {
public String getText(M item);
public String getHref(M item);
}
/**
* A helper class which encapsulates the text and href of an anchor tag for rendering purposes.
*/
public static class SidebarLink {
private final String text;
private final String href;
public SidebarLink(String text, String href) {
this.text = text;
this.href = href;
}
public String getText() {
return text;
}
public String getHref() {
return href;
}
}
/**
* A renderer which can render a {@link SidebarLink}.
*/
public static class SidebarLinkRenderer implements LinkRenderer<SidebarLink> {
@Override
public String getText(SidebarLink item) {
return item.getText();
}
@Override
public String getHref(SidebarLink item) {
return item.getHref();
}
}
public interface Css extends SimpleList.Css {
@Override
String listBase();
@Override
String listContainer();
@Override
String listItem();
String anchor();
}
private final LinkRenderer<M> renderer;
private final Css css;
public SidebarListItemRenderer(Css css, LinkRenderer<M> renderer) {
this.css = css;
this.renderer = renderer;
}
@Override
public void render(Element listItemBase, M itemData) {
AnchorElement anchor = Elements.createAnchorElement(css.anchor());
anchor.setTextContent(renderer.getText(itemData));
anchor.setHref(renderer.getHref(itemData));
listItemBase.appendChild(anchor);
}
@Override
public Element createElement() {
return Elements.createElement("li");
}
}