src/com/android/gallery3d/ui/ActionModeHandler.java - platform/packages/apps/Gallery2 - Git at Google

 /*
  * Copyright (C) 2010 The Android Open Source Project
  *
  * 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.android.gallery3d.ui;

 import android.app.Activity;
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
 import android.nfc.NfcAdapter;
 import android.os.Handler;
 import android.view.ActionMode;
 import android.view.LayoutInflater;
 import android.view.Menu;
 import android.view.MenuInflater;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.Button;
 import android.widget.PopupMenu.OnMenuItemClickListener;
 import android.widget.ShareActionProvider;
 import android.widget.ShareActionProvider.OnShareTargetSelectedListener;

 import com.android.gallery3d.R;
 import com.android.gallery3d.app.GalleryActionBar;
 import com.android.gallery3d.app.GalleryActivity;
 import com.android.gallery3d.common.Utils;
 import com.android.gallery3d.data.DataManager;
 import com.android.gallery3d.data.MediaObject;
 import com.android.gallery3d.data.Path;
 import com.android.gallery3d.ui.CustomMenu.DropDownMenu;
 import com.android.gallery3d.ui.MenuExecutor.ProgressListener;
 import com.android.gallery3d.util.Future;
 import com.android.gallery3d.util.GalleryUtils;
 import com.android.gallery3d.util.ThreadPool.Job;
 import com.android.gallery3d.util.ThreadPool.JobContext;

 import java.util.ArrayList;

 public class ActionModeHandler implements ActionMode.Callback {
     private static final String TAG = "ActionModeHandler";
     private static final int SUPPORT_MULTIPLE_MASK = MediaObject.SUPPORT_DELETE
             | MediaObject.SUPPORT_ROTATE | MediaObject.SUPPORT_SHARE
             | MediaObject.SUPPORT_CACHE | MediaObject.SUPPORT_IMPORT;

     public interface ActionModeListener {
         public boolean onActionItemClicked(MenuItem item);
     }

     private final GalleryActivity mActivity;
     private final MenuExecutor mMenuExecutor;
     private final SelectionManager mSelectionManager;
     private final NfcAdapter mNfcAdapter;
     private Menu mMenu;
     private DropDownMenu mSelectionMenu;
     private ActionModeListener mListener;
     private Future<?> mMenuTask;
     private final Handler mMainHandler;
     private ShareActionProvider mShareActionProvider;

     public ActionModeHandler(
             GalleryActivity activity, SelectionManager selectionManager) {
         mActivity = Utils.checkNotNull(activity);
         mSelectionManager = Utils.checkNotNull(selectionManager);
         mMenuExecutor = new MenuExecutor(activity, selectionManager);
         mMainHandler = new Handler(activity.getMainLooper());
         mNfcAdapter = NfcAdapter.getDefaultAdapter(mActivity.getAndroidContext());
     }

     public ActionMode startActionMode() {
         Activity a = (Activity) mActivity;
         final ActionMode actionMode = a.startActionMode(this);
         CustomMenu customMenu = new CustomMenu(a);
         View customView = LayoutInflater.from(a).inflate(
                 R.layout.action_mode, null);
         actionMode.setCustomView(customView);
         mSelectionMenu = customMenu.addDropDownMenu(
                 (Button) customView.findViewById(R.id.selection_menu),
                 R.menu.selection);
         updateSelectionMenu();
         customMenu.setOnMenuItemClickListener(new OnMenuItemClickListener() {
             @Override
             public boolean onMenuItemClick(MenuItem item) {
                 return onActionItemClicked(actionMode, item);
             }
         });
         return actionMode;
     }

     public void setTitle(String title) {
         mSelectionMenu.setTitle(title);
     }

     public void setActionModeListener(ActionModeListener listener) {
         mListener = listener;
     }

     @Override
     public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
         GLRoot root = mActivity.getGLRoot();
         root.lockRenderThread();
         try {
             boolean result;
             // Give listener a chance to process this command before it's routed to
             // ActionModeHandler, which handles command only based on the action id.
             // Sometimes the listener may have more background information to handle
             // an action command.
             if (mListener != null) {
                 result = mListener.onActionItemClicked(item);
                 if (result) {
                     mSelectionManager.leaveSelectionMode();
                     return result;
                 }
             }
             ProgressListener listener = null;
             String confirmMsg = null;
             int action = item.getItemId();
             if (action == R.id.action_import) {
                 listener = new ImportCompleteListener(mActivity);
             } else if (item.getItemId() == R.id.action_delete) {
                 confirmMsg = mActivity.getResources().getQuantityString(
                         R.plurals.delete_selection, mSelectionManager.getSelectedCount());
             }
             mMenuExecutor.onMenuClicked(item, confirmMsg, listener);
             if (action == R.id.action_select_all) {
                 updateSupportedOperation();
                 updateSelectionMenu();
             }
         } finally {
             root.unlockRenderThread();
         }
         return true;
     }

     private void updateSelectionMenu() {
         // update title
         int count = mSelectionManager.getSelectedCount();
         String format = mActivity.getResources().getQuantityString(
                 R.plurals.number_of_items_selected, count);
         setTitle(String.format(format, count));
         // For clients who call SelectionManager.selectAll() directly, we need to ensure the
         // menu status is consistent with selection manager.
         MenuItem item = mSelectionMenu.findItem(R.id.action_select_all);
         if (item != null) {
             if (mSelectionManager.inSelectAllMode()) {
                 item.setChecked(true);
                 item.setTitle(R.string.deselect_all);
             } else {
                 item.setChecked(false);
                 item.setTitle(R.string.select_all);
             }
         }
     }

     public boolean onCreateActionMode(ActionMode mode, Menu menu) {
         MenuInflater inflater = mode.getMenuInflater();
         inflater.inflate(R.menu.operation, menu);

         mShareActionProvider = GalleryActionBar.initializeShareActionProvider(menu);
         OnShareTargetSelectedListener listener = new OnShareTargetSelectedListener() {
             public boolean onShareTargetSelected(ShareActionProvider source, Intent intent) {
                 mSelectionManager.leaveSelectionMode();
                 return false;
             }
         };

         mShareActionProvider.setOnShareTargetSelectedListener(listener);
         mMenu = menu;
         return true;
     }

     public void onDestroyActionMode(ActionMode mode) {
         mSelectionManager.leaveSelectionMode();
     }

     public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
         return true;
     }

     // Menu options are determined by selection set itself.
     // We cannot expand it because MenuExecuter executes it based on
     // the selection set instead of the expanded result.
     // e.g. LocalImage can be rotated but collections of them (LocalAlbum) can't.
     private int computeMenuOptions(JobContext jc) {
         ArrayList<Path> unexpandedPaths = mSelectionManager.getSelected(false);
         if (unexpandedPaths.isEmpty()) {
             // This happens when starting selection mode from overflow menu
             // (instead of long press a media object)
             return 0;
         }
         int operation = MediaObject.SUPPORT_ALL;
         DataManager manager = mActivity.getDataManager();
         int type = 0;
         for (Path path : unexpandedPaths) {
             if (jc.isCancelled()) return 0;
             int support = manager.getSupportedOperations(path);
             type |= manager.getMediaType(path);
             operation &= support;
         }

         switch (unexpandedPaths.size()) {
             case 1:
                 final String mimeType = MenuExecutor.getMimeType(type);
                 if (!GalleryUtils.isEditorAvailable((Context) mActivity, mimeType)) {
                     operation &= ~MediaObject.SUPPORT_EDIT;
                 }
                 break;
             default:
                 operation &= SUPPORT_MULTIPLE_MASK;
         }

         return operation;
     }

     // Share intent needs to expand the selection set so we can get URI of
     // each media item
     private Intent computeSharingIntent(JobContext jc) {
         ArrayList<Path> expandedPaths = mSelectionManager.getSelected(true);
         if (expandedPaths.size() == 0) {
             if (mNfcAdapter != null) {
                 mNfcAdapter.setBeamPushUris(null, (Activity)mActivity);
             }
             return null;
         }
         final ArrayList<Uri> uris = new ArrayList<Uri>();
         DataManager manager = mActivity.getDataManager();
         int type = 0;
         final Intent intent = new Intent();
         for (Path path : expandedPaths) {
             if (jc.isCancelled()) return null;
             int support = manager.getSupportedOperations(path);
             type |= manager.getMediaType(path);

             if ((support & MediaObject.SUPPORT_SHARE) != 0) {
                 uris.add(manager.getContentUri(path));
             }
         }

         final int size = uris.size();
         if (size > 0) {
             final String mimeType = MenuExecutor.getMimeType(type);
             if (size > 1) {
                 intent.setAction(Intent.ACTION_SEND_MULTIPLE).setType(mimeType);
                 intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
             } else {
                 intent.setAction(Intent.ACTION_SEND).setType(mimeType);
                 intent.putExtra(Intent.EXTRA_STREAM, uris.get(0));
             }
             intent.setType(mimeType);
             if (mNfcAdapter != null) {
                 mNfcAdapter.setBeamPushUris(uris.toArray(new Uri[uris.size()]),
                         (Activity)mActivity);
             }
         } else {
             if (mNfcAdapter != null) {
                 mNfcAdapter.setBeamPushUris(null, (Activity)mActivity);
             }
         }

         return intent;
     }

     public void updateSupportedOperation(Path path, boolean selected) {
         // TODO: We need to improve the performance
         updateSupportedOperation();
     }

     public void updateSupportedOperation() {
         // Interrupt previous unfinished task, mMenuTask is only accessed in main thread
         if (mMenuTask != null) {
             mMenuTask.cancel();
         }

         updateSelectionMenu();

         // Disable share action until share intent is in good shape
         final MenuItem item = mShareActionProvider != null ?
                 mMenu.findItem(R.id.action_share) : null;
         final boolean supportShare = item != null;
         if (supportShare) item.setEnabled(false);

         // Generate sharing intent and update supported operations in the background
         // The task can take a long time and be canceled in the mean time.
         mMenuTask = mActivity.getThreadPool().submit(new Job<Void>() {
             public Void run(final JobContext jc) {
                 // Pass1: Deal with unexpanded media object list for menu operation.
                 final int operation = computeMenuOptions(jc);

                 // Pass2: Deal with expanded media object list for sharing operation.
                 final Intent intent = supportShare ? computeSharingIntent(jc) : null;
                 mMainHandler.post(new Runnable() {
                     public void run() {
                         mMenuTask = null;
                         if (!jc.isCancelled()) {
                             MenuExecutor.updateMenuOperation(mMenu, operation);
                             if (supportShare) {
                                 item.setEnabled(true);
                                 mShareActionProvider.setShareIntent(intent);
                             }
                         }
                     }
                 });
                 return null;
             }
         });
     }

     public void pause() {
         if (mMenuTask != null) {
             mMenuTask.cancel();
             mMenuTask = null;
         }
         mMenuExecutor.pause();
     }

     public void resume() {
         if (mSelectionManager.inSelectionMode()) updateSupportedOperation();
     }
 }
	/*
	* Copyright (C) 2010 The Android Open Source Project
	*
	* 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.android.gallery3d.ui;

	import android.app.Activity;
	import android.content.Context;
	import android.content.Intent;
	import android.net.Uri;
	import android.nfc.NfcAdapter;
	import android.os.Handler;
	import android.view.ActionMode;
	import android.view.LayoutInflater;
	import android.view.Menu;
	import android.view.MenuInflater;
	import android.view.MenuItem;
	import android.view.View;
	import android.widget.Button;
	import android.widget.PopupMenu.OnMenuItemClickListener;
	import android.widget.ShareActionProvider;
	import android.widget.ShareActionProvider.OnShareTargetSelectedListener;

	import com.android.gallery3d.R;
	import com.android.gallery3d.app.GalleryActionBar;
	import com.android.gallery3d.app.GalleryActivity;
	import com.android.gallery3d.common.Utils;
	import com.android.gallery3d.data.DataManager;
	import com.android.gallery3d.data.MediaObject;
	import com.android.gallery3d.data.Path;
	import com.android.gallery3d.ui.CustomMenu.DropDownMenu;
	import com.android.gallery3d.ui.MenuExecutor.ProgressListener;
	import com.android.gallery3d.util.Future;
	import com.android.gallery3d.util.GalleryUtils;
	import com.android.gallery3d.util.ThreadPool.Job;
	import com.android.gallery3d.util.ThreadPool.JobContext;

	import java.util.ArrayList;

	public class ActionModeHandler implements ActionMode.Callback {
	private static final String TAG = "ActionModeHandler";
	private static final int SUPPORT_MULTIPLE_MASK = MediaObject.SUPPORT_DELETE
	\| MediaObject.SUPPORT_ROTATE \| MediaObject.SUPPORT_SHARE
	\| MediaObject.SUPPORT_CACHE \| MediaObject.SUPPORT_IMPORT;

	public interface ActionModeListener {
	public boolean onActionItemClicked(MenuItem item);
	}

	private final GalleryActivity mActivity;
	private final MenuExecutor mMenuExecutor;
	private final SelectionManager mSelectionManager;
	private final NfcAdapter mNfcAdapter;
	private Menu mMenu;
	private DropDownMenu mSelectionMenu;
	private ActionModeListener mListener;
	private Future<?> mMenuTask;
	private final Handler mMainHandler;
	private ShareActionProvider mShareActionProvider;

	public ActionModeHandler(
	GalleryActivity activity, SelectionManager selectionManager) {
	mActivity = Utils.checkNotNull(activity);
	mSelectionManager = Utils.checkNotNull(selectionManager);
	mMenuExecutor = new MenuExecutor(activity, selectionManager);
	mMainHandler = new Handler(activity.getMainLooper());
	mNfcAdapter = NfcAdapter.getDefaultAdapter(mActivity.getAndroidContext());
	}

	public ActionMode startActionMode() {
	Activity a = (Activity) mActivity;
	final ActionMode actionMode = a.startActionMode(this);
	CustomMenu customMenu = new CustomMenu(a);
	View customView = LayoutInflater.from(a).inflate(
	R.layout.action_mode, null);
	actionMode.setCustomView(customView);
	mSelectionMenu = customMenu.addDropDownMenu(
	(Button) customView.findViewById(R.id.selection_menu),
	R.menu.selection);
	updateSelectionMenu();
	customMenu.setOnMenuItemClickListener(new OnMenuItemClickListener() {
	@Override
	public boolean onMenuItemClick(MenuItem item) {
	return onActionItemClicked(actionMode, item);
	}
	});
	return actionMode;
	}

	public void setTitle(String title) {
	mSelectionMenu.setTitle(title);
	}

	public void setActionModeListener(ActionModeListener listener) {
	mListener = listener;
	}

	@Override
	public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
	GLRoot root = mActivity.getGLRoot();
	root.lockRenderThread();
	try {
	boolean result;
	// Give listener a chance to process this command before it's routed to
	// ActionModeHandler, which handles command only based on the action id.
	// Sometimes the listener may have more background information to handle
	// an action command.
	if (mListener != null) {
	result = mListener.onActionItemClicked(item);
	if (result) {
	mSelectionManager.leaveSelectionMode();
	return result;
	}
	}
	ProgressListener listener = null;
	String confirmMsg = null;
	int action = item.getItemId();
	if (action == R.id.action_import) {
	listener = new ImportCompleteListener(mActivity);
	} else if (item.getItemId() == R.id.action_delete) {
	confirmMsg = mActivity.getResources().getQuantityString(
	R.plurals.delete_selection, mSelectionManager.getSelectedCount());
	}
	mMenuExecutor.onMenuClicked(item, confirmMsg, listener);
	if (action == R.id.action_select_all) {
	updateSupportedOperation();
	updateSelectionMenu();
	}
	} finally {
	root.unlockRenderThread();
	}
	return true;
	}

	private void updateSelectionMenu() {
	// update title
	int count = mSelectionManager.getSelectedCount();
	String format = mActivity.getResources().getQuantityString(
	R.plurals.number_of_items_selected, count);
	setTitle(String.format(format, count));
	// For clients who call SelectionManager.selectAll() directly, we need to ensure the
	// menu status is consistent with selection manager.
	MenuItem item = mSelectionMenu.findItem(R.id.action_select_all);
	if (item != null) {
	if (mSelectionManager.inSelectAllMode()) {
	item.setChecked(true);
	item.setTitle(R.string.deselect_all);
	} else {
	item.setChecked(false);
	item.setTitle(R.string.select_all);
	}
	}
	}

	public boolean onCreateActionMode(ActionMode mode, Menu menu) {
	MenuInflater inflater = mode.getMenuInflater();
	inflater.inflate(R.menu.operation, menu);

	mShareActionProvider = GalleryActionBar.initializeShareActionProvider(menu);
	OnShareTargetSelectedListener listener = new OnShareTargetSelectedListener() {
	public boolean onShareTargetSelected(ShareActionProvider source, Intent intent) {
	mSelectionManager.leaveSelectionMode();
	return false;
	}
	};

	mShareActionProvider.setOnShareTargetSelectedListener(listener);
	mMenu = menu;
	return true;
	}

	public void onDestroyActionMode(ActionMode mode) {
	mSelectionManager.leaveSelectionMode();
	}

	public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
	return true;
	}

	// Menu options are determined by selection set itself.
	// We cannot expand it because MenuExecuter executes it based on
	// the selection set instead of the expanded result.
	// e.g. LocalImage can be rotated but collections of them (LocalAlbum) can't.
	private int computeMenuOptions(JobContext jc) {
	ArrayList<Path> unexpandedPaths = mSelectionManager.getSelected(false);
	if (unexpandedPaths.isEmpty()) {
	// This happens when starting selection mode from overflow menu
	// (instead of long press a media object)
	return 0;
	}
	int operation = MediaObject.SUPPORT_ALL;
	DataManager manager = mActivity.getDataManager();
	int type = 0;
	for (Path path : unexpandedPaths) {
	if (jc.isCancelled()) return 0;
	int support = manager.getSupportedOperations(path);
	type \|= manager.getMediaType(path);
	operation &= support;
	}

	switch (unexpandedPaths.size()) {
	case 1:
	final String mimeType = MenuExecutor.getMimeType(type);
	if (!GalleryUtils.isEditorAvailable((Context) mActivity, mimeType)) {
	operation &= ~MediaObject.SUPPORT_EDIT;
	}
	break;
	default:
	operation &= SUPPORT_MULTIPLE_MASK;
	}

	return operation;
	}

	// Share intent needs to expand the selection set so we can get URI of
	// each media item
	private Intent computeSharingIntent(JobContext jc) {
	ArrayList<Path> expandedPaths = mSelectionManager.getSelected(true);
	if (expandedPaths.size() == 0) {
	if (mNfcAdapter != null) {
	mNfcAdapter.setBeamPushUris(null, (Activity)mActivity);
	}
	return null;
	}
	final ArrayList<Uri> uris = new ArrayList<Uri>();
	DataManager manager = mActivity.getDataManager();
	int type = 0;
	final Intent intent = new Intent();
	for (Path path : expandedPaths) {
	if (jc.isCancelled()) return null;
	int support = manager.getSupportedOperations(path);
	type \|= manager.getMediaType(path);

	if ((support & MediaObject.SUPPORT_SHARE) != 0) {
	uris.add(manager.getContentUri(path));
	}
	}

	final int size = uris.size();
	if (size > 0) {
	final String mimeType = MenuExecutor.getMimeType(type);
	if (size > 1) {
	intent.setAction(Intent.ACTION_SEND_MULTIPLE).setType(mimeType);
	intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris);
	} else {
	intent.setAction(Intent.ACTION_SEND).setType(mimeType);
	intent.putExtra(Intent.EXTRA_STREAM, uris.get(0));
	}
	intent.setType(mimeType);
	if (mNfcAdapter != null) {
	mNfcAdapter.setBeamPushUris(uris.toArray(new Uri[uris.size()]),
	(Activity)mActivity);
	}
	} else {
	if (mNfcAdapter != null) {
	mNfcAdapter.setBeamPushUris(null, (Activity)mActivity);
	}
	}

	return intent;
	}

	public void updateSupportedOperation(Path path, boolean selected) {
	// TODO: We need to improve the performance
	updateSupportedOperation();
	}

	public void updateSupportedOperation() {
	// Interrupt previous unfinished task, mMenuTask is only accessed in main thread
	if (mMenuTask != null) {
	mMenuTask.cancel();
	}

	updateSelectionMenu();

	// Disable share action until share intent is in good shape
	final MenuItem item = mShareActionProvider != null ?
	mMenu.findItem(R.id.action_share) : null;
	final boolean supportShare = item != null;
	if (supportShare) item.setEnabled(false);

	// Generate sharing intent and update supported operations in the background
	// The task can take a long time and be canceled in the mean time.
	mMenuTask = mActivity.getThreadPool().submit(new Job<Void>() {
	public Void run(final JobContext jc) {
	// Pass1: Deal with unexpanded media object list for menu operation.
	final int operation = computeMenuOptions(jc);

	// Pass2: Deal with expanded media object list for sharing operation.
	final Intent intent = supportShare ? computeSharingIntent(jc) : null;
	mMainHandler.post(new Runnable() {
	public void run() {
	mMenuTask = null;
	if (!jc.isCancelled()) {
	MenuExecutor.updateMenuOperation(mMenu, operation);
	if (supportShare) {
	item.setEnabled(true);
	mShareActionProvider.setShareIntent(intent);
	}
	}
	}
	});
	return null;
	}
	});
	}

	public void pause() {
	if (mMenuTask != null) {
	mMenuTask.cancel();
	mMenuTask = null;
	}
	mMenuExecutor.pause();
	}

	public void resume() {
	if (mSelectionManager.inSelectionMode()) updateSupportedOperation();
	}
	}