DiskUsageMenu.java

package com.google.android.diskusage;

import android.os.Build;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.MenuItem.OnMenuItemClickListener;

import com.google.android.diskusage.datasource.DataSource;
import com.google.android.diskusage.entity.FileSystemEntry;
import com.google.android.diskusage.entity.FileSystemFile;
import com.google.android.diskusage.entity.FileSystemSpecial;
import com.google.android.diskusage.entity.FileSystemSuperRoot;

public abstract class DiskUsageMenu {
  protected final DiskUsage diskusage;
  protected String searchPattern;
  private FileSystemEntry selectedEntity;
  protected FileSystemSuperRoot masterRoot;
  SearchManager searchManager = new SearchManager(this);

  protected MenuItem searchMenuItem;
  protected MenuItem showMenuItem;
  protected MenuItem rescanMenuItem;
  protected MenuItem deleteMenuItem;
  protected MenuItem rendererMenuItem;
  protected MenuItem filterMenuItem;

  public DiskUsageMenu(DiskUsage diskusage) {
    this.diskusage = diskusage;
  }

  public static DiskUsageMenu getInstance(DiskUsage diskusage) {
    final int sdkVersion = DataSource.get().getAndroidVersion();
    if (sdkVersion < Build.VERSION_CODES.CUPCAKE) {
      return new DiskUsageMenuPreCupcake(diskusage);
    }
    if (sdkVersion >= Build.VERSION_CODES.HONEYCOMB) {
      return new DiskUsageMenuHoneycomb(diskusage);
    } else {
      return new DiskUsageMenuFroyo(diskusage);
    }
  }

  public abstract void onCreate();
  public abstract boolean readyToFinish();
  public abstract void searchRequest();
  public abstract MenuItem makeSearchMenuEntry(Menu menu);

  public final void onSaveInstanceState(Bundle outState) {
    outState.putString("search", searchPattern);
  }

  public final void onRestoreInstanceState(Bundle inState) {
    searchPattern = inState.getString("search");
  }

  public void wrapAndSetContentView(View view, FileSystemSuperRoot newRoot) {
    this.masterRoot = newRoot;
    updateMenu();
  }

  public void applyPattern(String searchQuery) {
    if (searchQuery == null || masterRoot == null) return;

    if (searchQuery.length() == 0) {
      searchManager.cancelSearch();
      finishedSearch(masterRoot, searchQuery);
    } else {
      searchManager.search(searchQuery);
    }
  }

  public boolean finishedSearch(FileSystemSuperRoot newRoot, String searchQuery) {
    boolean matched = newRoot != null;
    if (!matched) newRoot = masterRoot;
    diskusage.applyPatternNewRoot(newRoot, searchQuery);
    return matched;
  }

  public void addRescanMenuEntry(Menu menu) {
    menu.add(getString(R.string.button_rescan))
    .setOnMenuItemClickListener(new OnMenuItemClickListener() {
      public boolean onMenuItemClick(MenuItem item) {
        diskusage.rescan();
        return true;
      }
    });
  }

  public void update(FileSystemEntry position) {
    this.selectedEntity = position;
    updateMenu();
  }

  private String getString(int id) {
    return diskusage.getString(id);
  }

  public boolean onPrepareOptionsMenu(Menu menu) {
    menu.clear();
    searchMenuItem = makeSearchMenuEntry(menu);

    showMenuItem = menu.add(getString(R.string.button_show));
    showMenuItem.setOnMenuItemClickListener(new OnMenuItemClickListener() {
      public boolean onMenuItemClick(MenuItem item) {
        if (selectedEntity != null) {
          diskusage.view(selectedEntity);
        }
        return true;
      }
    });
    rescanMenuItem = menu.add(getString(R.string.button_rescan));
    rescanMenuItem.setOnMenuItemClickListener(new OnMenuItemClickListener() {
      public boolean onMenuItemClick(MenuItem item) {
        diskusage.rescan();
        return true;
      }
    });

    deleteMenuItem = menu.add(getString(R.string.button_delete));
    deleteMenuItem.setOnMenuItemClickListener(new OnMenuItemClickListener() {
      public boolean onMenuItemClick(MenuItem item) {
        diskusage.askForDeletion(selectedEntity);
        return true;
      }
    });

    rendererMenuItem = menu.add("Renderer");
    rendererMenuItem.setVisible(
        diskusage.rendererManager.isHardwareRendererSupported());
    rendererMenuItem.setOnMenuItemClickListener(new OnMenuItemClickListener() {
      public boolean onMenuItemClick(MenuItem item) {
        diskusage.rendererManager.switchRenderer(masterRoot);
        return true;
      }
    });

    filterMenuItem = menu.add(getString(R.string.change_filter));
    filterMenuItem.setOnMenuItemClickListener(new OnMenuItemClickListener() {
      public boolean onMenuItemClick(MenuItem item) {
        diskusage.showFilterDialog();
        return true;
      }
    });

    updateMenu();
    return true;
  }

  private void updateMenu() {
    if (showMenuItem == null) return;

    if (diskusage.fileSystemState == null) {
      searchMenuItem.setEnabled(false);
      showMenuItem.setEnabled(false);
      rescanMenuItem.setEnabled(false);
      deleteMenuItem.setEnabled(false);
      rendererMenuItem.setEnabled(false);
      return;
    }

    if (diskusage.fileSystemState.sdcardIsEmpty()) {
      searchMenuItem.setEnabled(false);
      showMenuItem.setEnabled(false);
      rescanMenuItem.setEnabled(true);
      deleteMenuItem.setEnabled(false);
      rendererMenuItem.setEnabled(false);
    }

    rendererMenuItem.setEnabled(true);
    final boolean isGPU = diskusage.fileSystemState.isGPU();
    rendererMenuItem.setTitle(isGPU ? "Software Renderer" : "Hardware Renderer");

    rescanMenuItem.setEnabled(true);
    searchMenuItem.setEnabled(true);


    boolean view = !(selectedEntity == diskusage.fileSystemState.masterRoot.children[0]
                || selectedEntity instanceof FileSystemSpecial);
    showMenuItem.setEnabled(view);

    boolean fileOrNotSearching = searchPattern == null || selectedEntity.children == null;
    deleteMenuItem.setEnabled(view && selectedEntity instanceof FileSystemFile
        && fileOrNotSearching);

    boolean isAppUsage = diskusage instanceof AppUsage;

    deleteMenuItem.setVisible(!isAppUsage);
    filterMenuItem.setVisible(isAppUsage);
  }

//  @Override
//  public boolean onPrepareOptionsMenu(Menu menu) {
//    //Log.d("DiskUsage", "onCreateContextMenu");
//    menu.clear();
//    platform.addSearchMenuEntry(menu);
//    if (fileSystemState == null) return true;
//
//    boolean showFileMenu = addShowMenuEntry(menu);
//    addRendererSwitchItem(menu);
//    addRescanMenuEntry(menu);
//
//    final FileSystemEntry menuForEntry = selectedEntity;
//    menu.add(str(R.string.button_delete))
//    .setEnabled(showFileMenu && menuForEntry instanceof FileSystemFile)
//    .setOnMenuItemClickListener(new OnMenuItemClickListener() {
//      public boolean onMenuItemClick(MenuItem item) {
//        askForDeletion(menuForEntry);
//        return true;
//      }
//    });
//    return true;
//  }

//  @Override // FIXME AppUsage
//  public final boolean onPrepareOptionsMenu(Menu menu) {
//    //Log.d("DiskUsage", "onCreateContextMenu");
//    menu.clear();
//    platform.addSearchMenuEntry(menu);
//    if (fileSystemState == null) return true;
//    addShowMenuEntry(menu);
//    addRendererSwitchItem(menu);
//    addRescanMenuEntry(menu);
//
//    menu.add(getString(R.string.change_filter))
//    .setOnMenuItemClickListener(new OnMenuItemClickListener() {
//      public boolean onMenuItemClick(MenuItem item) {
//        showFilterDialog();
//        return true;
//      }
//    });
//    return true;
//  }
//

}