Android Open Source - bad Bad Fragment

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License

The source code is released under:

Copyright (C) 2013 Madis Pink Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Softwa...

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Java Source Code

package com.madisp.bad.lib;
//  w  w w. j  a  v a 2 s.  c  om
import android.app.Fragment;
import android.os.*;
import android.os.Process;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import com.madisp.bad.decor.CheckableDecorator;
import com.madisp.bad.decor.EditTextDecorator;
import com.madisp.bad.decor.ListViewDecorator;
import com.madisp.bad.decor.TextViewDecorator;
import com.madisp.bad.decor.ViewDecorator;
import com.madisp.bad.decor.WebViewDecorator;
import com.madisp.bad.eval.BadScope;
import com.madisp.bad.eval.Scope;
import com.madisp.bad.eval.ScopeWrapper;
import com.madisp.bad.expr.BlockExpression;
import com.madisp.bad.expr.ExpressionFactory;

/**
 * Created with IntelliJ IDEA.
 * User: madis
 * Date: 3/20/13
 * Time: 9:04 AM
 */
public abstract class BadFragment extends Fragment {
  private final int layout;
  private Scope scope;
  protected final Handler fg, bg;
  private final HandlerThread bgThread;

  private ExpressionFactory exprFactory = new ExpressionFactory();

  protected BadFragment(int layoutRes) {
    this.layout = layoutRes;
    fg = new Handler(Looper.getMainLooper());
    bgThread = new HandlerThread("badBgThread", Process.THREAD_PRIORITY_BACKGROUND);
    bgThread.start();
    bg = new Handler(bgThread.getLooper());
  }

  protected final Scope getScope() {
    return scope == null ? (scope = createScope()) : scope;
  }

  protected Scope createScope() {
    return new BadScope(new BadScope(null, new BadStdLib(getActivity())), this);
  }

  public void bg(final BlockExpression bgExpr) {
    bg(bgExpr, null);
  }

  public void bg(final BlockExpression bgExpr, final BlockExpression fgExpr) {
    // it's a possible leak
    bg.post(new Runnable() {
      @Override
      public void run() {
        bgExpr.yield(new ScopeWrapper(getScope()) {
          @Override
          public void setVar(final Object base, final String var, final Object newValue) {
            fg.post(new Runnable() {
              @Override
              public void run() {
                scope.setVar(base, var, newValue);
              }
            });
          }
        });
        if (fgExpr != null) {
          fg.post(new Runnable() {
            @Override
            public void run() {
              fgExpr.yield(getScope());
            }
          });
        }
      }
    });
  }

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    long start = System.nanoTime();
    BadLayoutFactory factory = new BadLayoutFactory(inflater, getScope());
    // register standard decorators
    factory.addDecorator(new CheckableDecorator(exprFactory));
    factory.addDecorator(new EditTextDecorator(exprFactory));
    factory.addDecorator(new TextViewDecorator(exprFactory));
    factory.addDecorator(new ViewDecorator(exprFactory));
    factory.addDecorator(new ListViewDecorator(exprFactory));
    factory.addDecorator(new WebViewDecorator(exprFactory));
    // hook to add more decorators before inflation
    beforeInflate(factory);
    View v = factory.getInflater().inflate(layout, null);
    long end = System.nanoTime();
    Log.d("BadLib", "inflation took " + (end-start) + "ns");
    return v;
  }

  @Override
  public void onDestroy() {
    super.onDestroy();
    bgThread.quit();
  }

  protected void beforeInflate(BadLayoutFactory factory) {}
}

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