Android Open Source - saostar Tabs

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License

The source code is released under:
Apache License
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Java Source Code

package net.azyobuzi.azyotter.saostar.configuration;
/* w ww .  j ava2  s  .  c o  m*/
import java.util.ArrayList;

import javax.xml.parsers.DocumentBuilderFactory;
import javax.xml.transform.TransformerFactory;
import javax.xml.transform.dom.DOMSource;
import javax.xml.transform.stream.StreamResult;

import net.azyobuzi.azyotter.saostar.ContextAccess;
import net.azyobuzi.azyotter.saostar.linq.Enumerable;
import net.azyobuzi.azyotter.saostar.system.Action1;
import net.azyobuzi.azyotter.saostar.system.Action2;
import net.azyobuzi.azyotter.saostar.system.Action3;

import org.w3c.dom.Document;
import org.w3c.dom.Element;
import org.w3c.dom.NodeList;

import android.content.Context;

public class Tabs {
  private static final String fileName = "tabs.xml";

  private static ArrayList<Tab> list = null;

  private static void loadTabs() {
    list = new ArrayList<Tab>();

    try {
      Element root = DocumentBuilderFactory.newInstance()
        .newDocumentBuilder()
        .parse(ContextAccess.openFileInput(fileName))
        .getDocumentElement();

      NodeList tabs = root.getElementsByTagName("tab");
      for (int i = 0; i < tabs.getLength(); i++) {
        Element elm = (Element)tabs.item(i);
        Tab re = new Tab(
          elm.getElementsByTagName("name").item(0).getTextContent(),
          elm.getElementsByTagName("filter").item(0).getTextContent()
        );
        list.add(re);
      }
    } catch (Exception ex) {
      ex.printStackTrace();

      //????
      Tab homeTab = new Tab();
      homeTab.setName("Home");
      try {
        homeTab.setFilter("prop:isHomeTweet");
      } catch (Exception e) {
        e.printStackTrace();
      }
      add(homeTab);
    }
  }

  public static Enumerable<Tab> getAllTabs() {
    if (list == null) loadTabs();
    return Enumerable.from(list.toArray()).cast();
  }

  public static int getTabsCount() {
    if (list == null) loadTabs();
    return list.size();
  }

  public static Tab get(int index) {
    if (list == null) loadTabs();
    return list.get(index);
  }

  public static int indexOf(Tab tab) {
    if (list == null) loadTabs();
    return list.indexOf(tab);
  }

  public static void add(Tab tab) {
    if (list == null) loadTabs();
    list.add(tab);

    for (Action1<Tab> handler : addedHandler) {
      handler.invoke(tab);
    }

    save();
  }

  public static final ArrayList<Action1<Tab>> addedHandler = new ArrayList<Action1<Tab>>();

  public static void remove(Tab tab) {
    if (list == null) loadTabs();
    list.remove(tab);

    for (Action1<Tab> handler : removedHandler) {
      handler.invoke(tab);
    }

    save();
  }

  public static final ArrayList<Action1<Tab>> removedHandler = new ArrayList<Action1<Tab>>();

  public static void move(int from, int to) {
    if (list == null) loadTabs();
    Tab tab = list.remove(from);
    list.add(to, tab);

    for (Action3<Tab, Integer, Integer> handler : movedHandler) {
      handler.invoke(tab, from, to);
    }

    save();
  }

  public static final ArrayList<Action3<Tab, Integer, Integer>> movedHandler = new ArrayList<Action3<Tab, Integer, Integer>>();

  public static void save() {
    if (list == null) return;
    
    try {
      final Document doc = DocumentBuilderFactory.newInstance()
          .newDocumentBuilder()
          .newDocument();

      final Element root = doc.createElement("tabs");

      getAllTabs().forEach(new Action2<Tab, Integer>() {
        @Override
        public void invoke(Tab arg0, Integer arg1) {
          Element elm = doc.createElement("tab");

          Element child = doc.createElement("name");
          child.appendChild(doc.createTextNode(arg0.getName()));
          elm.appendChild(child);

          child = doc.createElement("filter");
          child.appendChild(doc.createTextNode(arg0.getFilter()));
          elm.appendChild(child);

          root.appendChild(elm);
        }
      });

      doc.appendChild(root);

      TransformerFactory.newInstance()
        .newTransformer()
        .transform(new DOMSource(doc), new StreamResult(ContextAccess.openFileOutput(fileName, Context.MODE_PRIVATE)));
    } catch (Exception ex) {
      ex.printStackTrace(); //??????????????????????
    }
  }
}
Java Source Code List
