/*
 * Copyright (C) 2012 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.camera;

import android.animation.Animator;
import android.annotation.TargetApi;
import android.app.ActionBar;
import android.app.Activity;
import android.content.ActivityNotFoundException;
import android.content.BroadcastReceiver;
import android.content.ContentResolver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.SharedPreferences;
import android.content.pm.ActivityInfo;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.Color;
import android.graphics.SurfaceTexture;
import android.graphics.drawable.ColorDrawable;
import android.net.Uri;
import android.nfc.NfcAdapter;
import android.nfc.NfcAdapter.CreateBeamUrisCallback;
import android.nfc.NfcEvent;
import android.os.AsyncTask;
import android.os.Build;
import android.os.Bundle;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.preference.PreferenceManager;
import android.provider.MediaStore;
import android.provider.Settings;
import android.util.Log;
import android.view.Gravity;
import android.view.KeyEvent;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuInflater;
import android.view.MenuItem;
import android.view.MotionEvent;
import android.view.View;
import android.view.ViewGroup;
import android.view.Window;
import android.view.WindowManager;
import android.widget.FrameLayout;
import android.widget.FrameLayout.LayoutParams;
import android.widget.ImageView;
import android.widget.PopupWindow;
import android.widget.ProgressBar;
import android.widget.ShareActionProvider;

import com.android.camera.app.AppController;
import com.android.camera.app.AppManagerFactory;
import com.android.camera.app.CameraAppUI;
import com.android.camera.app.CameraController;
import com.android.camera.app.CameraManager;
import com.android.camera.app.CameraManagerFactory;
import com.android.camera.app.CameraProvider;
import com.android.camera.app.CameraServices;
import com.android.camera.app.ImageTaskManager;
import com.android.camera.app.MediaSaver;
import com.android.camera.app.ModuleManagerImpl;
import com.android.camera.app.OrientationManager;
import com.android.camera.app.OrientationManagerImpl;
import com.android.camera.app.PanoramaStitchingManager;
import com.android.camera.app.PlaceholderManager;
import com.android.camera.crop.CropActivity;
import com.android.camera.data.CameraDataAdapter;
import com.android.camera.data.CameraPreviewData;
import com.android.camera.data.FixedFirstDataAdapter;
import com.android.camera.data.FixedLastDataAdapter;
import com.android.camera.data.InProgressDataWrapper;
import com.android.camera.data.LocalData;
import com.android.camera.data.LocalDataAdapter;
import com.android.camera.data.LocalMediaObserver;
import com.android.camera.data.MediaDetails;
import com.android.camera.data.SimpleViewData;
import com.android.camera.filmstrip.FilmstripController;
import com.android.camera.filmstrip.FilmstripImageData;
import com.android.camera.filmstrip.FilmstripListener;
import com.android.camera.module.ModulesInfo;
import com.android.camera.settings.SettingsManager;
import com.android.camera.settings.SettingsManager.SettingsCapabilities;
import com.android.camera.settings.SettingsManager.StartupModuleSetting;
import com.android.camera.tinyplanet.TinyPlanetFragment;
import com.android.camera.ui.CameraControls;
import com.android.camera.ui.DetailsDialog;
import com.android.camera.ui.FilmstripView;
import com.android.camera.ui.MainActivityLayout;
import com.android.camera.ui.ModeListView;
import com.android.camera.ui.SettingsView;
import com.android.camera.util.ApiHelper;
import com.android.camera.util.CameraUtil;
import com.android.camera.util.GcamHelper;
import com.android.camera.util.IntentHelper;
import com.android.camera.util.PhotoSphereHelper.PanoramaViewHelper;
import com.android.camera.util.UsageStatistics;
import com.android.camera2.R;

import java.io.File;
import java.util.List;

public class CameraActivity extends Activity
        implements AppController, CameraManager.CameraOpenCallback,
        ActionBar.OnMenuVisibilityListener, ShareActionProvider.OnShareTargetSelectedListener,
        OrientationManager.OnOrientationChangeListener {

    private static final String TAG = "CAM_Activity";

    private static final String INTENT_ACTION_STILL_IMAGE_CAMERA_SECURE =
            "android.media.action.STILL_IMAGE_CAMERA_SECURE";
    public static final String ACTION_IMAGE_CAPTURE_SECURE =
            "android.media.action.IMAGE_CAPTURE_SECURE";
    public static final String ACTION_TRIM_VIDEO =
            "com.android.camera.action.TRIM";
    public static final String MEDIA_ITEM_PATH = "media-item-path";

    // The intent extra for camera from secure lock screen. True if the gallery
    // should only show newly captured pictures. sSecureAlbumId does not
    // increment. This is used when switching between camera, camcorder, and
    // panorama. If the extra is not set, it is in the normal camera mode.
    public static final String SECURE_CAMERA_EXTRA = "secure_camera";

    /**
     * Request code from an activity we started that indicated that we do not want
     * to reset the view to the preview in onResume.
     */
    public static final int REQ_CODE_DONT_SWITCH_TO_PREVIEW = 142;

    public static final int REQ_CODE_GCAM_DEBUG_POSTCAPTURE = 999;

    private static final int MSG_HIDE_ACTION_BAR = 1;
    private static final int MSG_CLEAR_SCREEN_ON_FLAG = 2;
    private static final long SHOW_ACTION_BAR_TIMEOUT_MS = 3000;
    private static final long SCREEN_DELAY_MS = 2 * 60 * 1000;  // 2 mins.

    /**
     * Whether onResume should reset the view to the preview.
     */
    private boolean mResetToPreviewOnResume = true;

    // Supported operations at FilmStripView. Different data has different
    // set of supported operations.
    private static final int SUPPORT_DELETE = 1 << 0;
    private static final int SUPPORT_ROTATE = 1 << 1;
    private static final int SUPPORT_INFO = 1 << 2;
    private static final int SUPPORT_CROP = 1 << 3;
    private static final int SUPPORT_SETAS = 1 << 4;
    private static final int SUPPORT_EDIT = 1 << 5;
    private static final int SUPPORT_TRIM = 1 << 6;
    private static final int SUPPORT_SHARE = 1 << 7;
    private static final int SUPPORT_SHARE_PANORAMA360 = 1 << 8;
    private static final int SUPPORT_SHOW_ON_MAP = 1 << 9;
    private static final int SUPPORT_ALL = 0xffffffff;

    /**
     * This data adapter is used by FilmStripView.
     */
    private LocalDataAdapter mDataAdapter;
    /**
     * This data adapter represents the real local camera data.
     */
    private LocalDataAdapter mWrappedDataAdapter;

    private SettingsManager mSettingsManager;
    private SettingsController mSettingsController;
    private PanoramaStitchingManager mPanoramaManager;
    private PlaceholderManager mPlaceholderManager;
    private ModeListView mModeListView;
    private int mCurrentModeIndex;
    private CameraModule mCurrentModule;
    private ModuleManagerImpl mModuleManager;
    private FrameLayout mAboveFilmstripControlLayout;
    private FrameLayout mCameraModuleRootView;
    private FilmstripController mFilmstripController;
    private ProgressBar mBottomProgress;
    private View mPanoStitchingPanel;
    private int mResultCodeForTesting;
    private Intent mResultDataForTesting;
    private OnScreenHint mStorageHint;
    private long mStorageSpaceBytes = Storage.LOW_STORAGE_THRESHOLD_BYTES;
    private boolean mAutoRotateScreen;
    private boolean mSecureCamera;
    private int mLastRawOrientation;
    private OrientationManagerImpl mOrientationManager;
    private LocationManager mLocationManager;
    private Handler mMainHandler;
    private PanoramaViewHelper mPanoramaViewHelper;
    private CameraPreviewData mCameraPreviewData;
    private ActionBar mActionBar;
    private OnActionBarVisibilityListener mOnActionBarVisibilityListener = null;
    private Menu mActionBarMenu;
    private ViewGroup mUndoDeletionBar;
    private boolean mIsUndoingDeletion = false;

    private final Uri[] mNfcPushUris = new Uri[1];

    private ShareActionProvider mStandardShareActionProvider;
    private Intent mStandardShareIntent;
    private ShareActionProvider mPanoramaShareActionProvider;
    private Intent mPanoramaShareIntent;
    private LocalMediaObserver mLocalImagesObserver;
    private LocalMediaObserver mLocalVideosObserver;

    private final int DEFAULT_SYSTEM_UI_VISIBILITY = View.SYSTEM_UI_FLAG_LAYOUT_FULLSCREEN
            | View.SYSTEM_UI_FLAG_LAYOUT_HIDE_NAVIGATION;
    private boolean mPendingDeletion = false;

    private Intent mVideoShareIntent;
    private Intent mImageShareIntent;

    private CameraController mCameraController;
    private boolean mPaused;
    private CameraAppUI mCameraAppUI;

    private MediaSaver mMediaSaver;

    // close activity when screen turns off
    private final BroadcastReceiver mScreenOffReceiver = new BroadcastReceiver() {
        @Override
        public void onReceive(Context context, Intent intent) {
            finish();
        }
    };

    private static BroadcastReceiver sScreenOffReceiver;

    /**
     * Whether the screen is kept turned on.
     */
    private boolean mKeepScreenOn;

    @Override
    public void onCameraOpened(CameraManager.CameraProxy camera) {
        if (!mModuleManager.getModuleAgent(mCurrentModeIndex).requestAppForCamera()) {
            // We shouldn't be here. Just close the camera and leave.
            camera.release(false);
            throw new IllegalStateException("Camera opened but the module shouldn't be " +
                    "requesting");
        }
        if (mCurrentModule != null) {
            SettingsCapabilities capabilities =
                SettingsController.getSettingsCapabilities(camera);
            mSettingsManager.changeCamera(camera.getCameraId(), capabilities);
            mCurrentModule.onCameraAvailable(camera);
        }
    }

    @Override
    public void onCameraDisabled(int cameraId) {
        UsageStatistics.onEvent(UsageStatistics.COMPONENT_CAMERA, UsageStatistics.ACTION_OPEN_FAIL,
                "security");

        CameraUtil.showErrorAndFinish(this, R.string.camera_disabled);
    }

    @Override
    public void onDeviceOpenFailure(int cameraId) {
        UsageStatistics.onEvent(UsageStatistics.COMPONENT_CAMERA,
                UsageStatistics.ACTION_OPEN_FAIL, "open");

        CameraUtil.showErrorAndFinish(this, R.string.cannot_connect_camera);
    }

    @Override
    public void onReconnectionFailure(CameraManager mgr) {
        UsageStatistics.onEvent(UsageStatistics.COMPONENT_CAMERA,
                UsageStatistics.ACTION_OPEN_FAIL, "reconnect");

        CameraUtil.showErrorAndFinish(this, R.string.cannot_connect_camera);
    }

    private class MainHandler extends Handler {
        public MainHandler(Looper looper) {
            super(looper);
        }

        @Override
        public void handleMessage(Message msg) {
            switch (msg.what) {
                case MSG_HIDE_ACTION_BAR: {
                    removeMessages(MSG_HIDE_ACTION_BAR);
                    CameraActivity.this.setSystemBarsVisibility(false);
                    break;
                }

                case MSG_CLEAR_SCREEN_ON_FLAG:  {
                    if (!mPaused) {
                        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
                    }
                    break;
                }

                default:
            }
        }
    }

    public interface OnActionBarVisibilityListener {
        public void onActionBarVisibilityChanged(boolean isVisible);
    }

    public void setOnActionBarVisibilityListener(OnActionBarVisibilityListener listener) {
        mOnActionBarVisibilityListener = listener;
    }

    private String fileNameFromDataID(int dataID) {
        final LocalData localData = mDataAdapter.getLocalData(dataID);

        File localFile = new File(localData.getPath());
        return localFile.getName();
    }

    private final FilmstripListener mFilmStripListener =
            new FilmstripListener() {
                @Override
                public void onDataPromoted(int dataID) {
                    UsageStatistics.onEvent(UsageStatistics.COMPONENT_CAMERA,
                            UsageStatistics.ACTION_DELETE, "promoted", 0,
                            UsageStatistics.hashFileName(fileNameFromDataID(dataID)));

                    removeData(dataID);
                }

                @Override
                public void onDataDemoted(int dataID) {
                    UsageStatistics.onEvent(UsageStatistics.COMPONENT_CAMERA,
                            UsageStatistics.ACTION_DELETE, "demoted", 0,
                            UsageStatistics.hashFileName(fileNameFromDataID(dataID)));

                    removeData(dataID);
                }

                @Override
                public void onDataFullScreenChange(int dataID, boolean full) {
                    boolean isCameraID = isCameraPreview(dataID);
                    if (!isCameraID) {
                        if (!full) {
                            // Always show action bar in filmstrip mode
                            CameraActivity.this.setSystemBarsVisibility(true, false);
                        } else if (mActionBar.isShowing()) {
                            // Hide action bar after time out in full screen mode
                            mMainHandler.sendEmptyMessageDelayed(MSG_HIDE_ACTION_BAR,
                                    SHOW_ACTION_BAR_TIMEOUT_MS);
                        }
                    }
                }

                /**
                 * Check if the local data corresponding to dataID is the camera
                 * preview.
                 *
                 * @param dataID the ID of the local data
                 * @return true if the local data is not null and it is the
                 *         camera preview.
                 */
                private boolean isCameraPreview(int dataID) {
                    LocalData localData = mDataAdapter.getLocalData(dataID);
                    if (localData == null) {
                        Log.w(TAG, "Current data ID not found.");
                        return false;
                    }
                    return localData.getLocalDataType() == LocalData.LOCAL_CAMERA_PREVIEW;
                }

                @Override
                public void onDataReloaded() {
                    setPreviewControlsVisibility(true);
                    CameraActivity.this.setSystemBarsVisibility(false);
                }

                @Override
                public void onCurrentDataCentered(int dataID) {
                    if (dataID != 0 && !mFilmstripController.isCameraPreview()) {
                        // For now, We ignore all items that are not the camera preview.
                        return;
                    }

                    if (!arePreviewControlsVisible()) {
                        setPreviewControlsVisibility(true);
                        CameraActivity.this.setSystemBarsVisibility(false);
                    }
                }

                @Override
                public void onCurrentDataOffCentered(int dataID) {
                    if (dataID != 0 && !mFilmstripController.isCameraPreview()) {
                        // For now, We ignore all items that are not the camera preview.
                        return;
                    }

                    if (arePreviewControlsVisible()) {
                        setPreviewControlsVisibility(false);
                    }
                }

                @Override
                public void onDataFocusChanged(final int dataID, final boolean focused) {
                    // Delay hiding action bar if there is any user interaction
                    if (mMainHandler.hasMessages(MSG_HIDE_ACTION_BAR)) {
                        mMainHandler.removeMessages(MSG_HIDE_ACTION_BAR);
                        mMainHandler.sendEmptyMessageDelayed(MSG_HIDE_ACTION_BAR,
                                SHOW_ACTION_BAR_TIMEOUT_MS);
                    }
                    // TODO: This callback is UI event callback, should always
                    // happen on UI thread. Find the reason for this
                    // runOnUiThread() and fix it.
                    runOnUiThread(new Runnable() {
                        @Override
                        public void run() {
                            LocalData currentData = mDataAdapter.getLocalData(dataID);
                            if (currentData == null) {
                                Log.w(TAG, "Current data ID not found.");
                                hidePanoStitchingProgress();
                                return;
                            }
                            boolean isCameraID = currentData.getLocalDataType() ==
                                    LocalData.LOCAL_CAMERA_PREVIEW;
                            if (!focused) {
                                if (isCameraID) {
                                    mCurrentModule.onPreviewFocusChanged(false);
                                    CameraActivity.this.setSystemBarsVisibility(true);
                                }
                                hidePanoStitchingProgress();
                            } else {
                                if (isCameraID) {
                                    // Don't show the action bar in Camera
                                    // preview.
                                    CameraActivity.this.setSystemBarsVisibility(false);

                                    if (mPendingDeletion) {
                                        performDeletion();
                                    }
                                } else {
                                    updateActionBarMenu(dataID);
                                }

                                Uri contentUri = currentData.getContentUri();
                                if (contentUri == null) {
                                    hidePanoStitchingProgress();
                                    return;
                                }
                                int panoStitchingProgress = mPanoramaManager.getTaskProgress(contentUri);
                                if (panoStitchingProgress < 0) {
                                    hidePanoStitchingProgress();
                                    return;
                                }
                                showPanoStitchingProgress();
                                updateStitchingProgress(panoStitchingProgress);
                            }
                        }
                    });
                }

                @Override
                public void onToggleSystemDecorsVisibility(int dataID) {
                    // If action bar is showing, hide it immediately, otherwise
                    // show action bar and hide it later
                    if (mActionBar.isShowing()) {
                        CameraActivity.this.setSystemBarsVisibility(false);
                    } else {
                        // Don't show the action bar if that is the camera preview.
                        boolean isCameraID = isCameraPreview(dataID);
                        if (!isCameraID) {
                            CameraActivity.this.setSystemBarsVisibility(true, true);
                        }
                    }
                }

                @Override
                public void setSystemDecorsVisibility(boolean visible) {
                    CameraActivity.this.setSystemBarsVisibility(visible);
                }
            };

    public void gotoGallery() {
        UsageStatistics.onEvent(UsageStatistics.COMPONENT_CAMERA, UsageStatistics.ACTION_FILMSTRIP,
                "thumbnailTap");

        mFilmstripController.goToNextItem();
    }

    /**
     * If {@param visible} is false, this hides the action bar and switches the system UI
     * to lights-out mode.
     */
    // TODO: This should not be called outside of the activity.
    public void setSystemBarsVisibility(boolean visible) {
        setSystemBarsVisibility(visible, false);
    }

    /**
     * If {@param visible} is false, this hides the action bar and switches the
     * system UI to lights-out mode. If {@param hideLater} is true, a delayed message
     * will be sent after a timeout to hide the action bar.
     */
    private void setSystemBarsVisibility(boolean visible, boolean hideLater) {
        mMainHandler.removeMessages(MSG_HIDE_ACTION_BAR);

        int currentSystemUIVisibility = mAboveFilmstripControlLayout.getSystemUiVisibility();
        int newSystemUIVisibility = DEFAULT_SYSTEM_UI_VISIBILITY |
                (visible ? View.SYSTEM_UI_FLAG_VISIBLE :
                        View.SYSTEM_UI_FLAG_LOW_PROFILE | View.SYSTEM_UI_FLAG_FULLSCREEN);
        if (newSystemUIVisibility != currentSystemUIVisibility) {
            mAboveFilmstripControlLayout.setSystemUiVisibility(newSystemUIVisibility);
        }

        boolean currentActionBarVisibility = mActionBar.isShowing();
        if (visible != currentActionBarVisibility) {
            if (visible) {
                mActionBar.show();
            } else {
                mActionBar.hide();
            }
            if (mOnActionBarVisibilityListener != null) {
                mOnActionBarVisibilityListener.onActionBarVisibilityChanged(visible);
            }
        }

        // Now delay hiding the bars
        if (visible && hideLater) {
            mMainHandler.sendEmptyMessageDelayed(MSG_HIDE_ACTION_BAR, SHOW_ACTION_BAR_TIMEOUT_MS);
        }
    }

    private void hidePanoStitchingProgress() {
        mPanoStitchingPanel.setVisibility(View.GONE);
    }

    private void showPanoStitchingProgress() {
        mPanoStitchingPanel.setVisibility(View.VISIBLE);
    }

    private void updateStitchingProgress(int progress) {
        mBottomProgress.setProgress(progress);
    }

    @TargetApi(Build.VERSION_CODES.JELLY_BEAN)
    private void setupNfcBeamPush() {
        NfcAdapter adapter = NfcAdapter.getDefaultAdapter(CameraActivity.this);
        if (adapter == null) {
            return;
        }

        if (!ApiHelper.HAS_SET_BEAM_PUSH_URIS) {
            // Disable beaming
            adapter.setNdefPushMessage(null, CameraActivity.this);
            return;
        }

        adapter.setBeamPushUris(null, CameraActivity.this);
        adapter.setBeamPushUrisCallback(new CreateBeamUrisCallback() {
            @Override
            public Uri[] createBeamUris(NfcEvent event) {
                return mNfcPushUris;
            }
        }, CameraActivity.this);
    }

    private void setNfcBeamPushUri(Uri uri) {
        mNfcPushUris[0] = uri;
    }

    private void setStandardShareIntent(Uri contentUri, String mimeType) {
        mStandardShareIntent = getShareIntentFromType(mimeType);
        if (mStandardShareIntent != null) {
            mStandardShareIntent.putExtra(Intent.EXTRA_STREAM, contentUri);
            mStandardShareIntent.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
            if (mStandardShareActionProvider != null) {
                mStandardShareActionProvider.setShareIntent(mStandardShareIntent);
            }
        }
    }

    /**
     * Get the share intent according to the mimeType
     *
     * @param mimeType The mimeType of current data.
     * @return the video/image's ShareIntent or null if mimeType is invalid.
     */
    private Intent getShareIntentFromType(String mimeType) {
        // Lazily create the intent object.
        if (mimeType.startsWith("video/")) {
            if (mVideoShareIntent == null) {
                mVideoShareIntent = new Intent(Intent.ACTION_SEND);
                mVideoShareIntent.setType("video/*");
            }
            return mVideoShareIntent;
        } else if (mimeType.startsWith("image/")) {
            if (mImageShareIntent == null) {
                mImageShareIntent = new Intent(Intent.ACTION_SEND);
                mImageShareIntent.setType("image/*");
            }
            return mImageShareIntent;
        }
        Log.w(TAG, "unsupported mimeType " + mimeType);
        return null;
    }

    private void setPanoramaShareIntent(Uri contentUri) {
        if (mPanoramaShareIntent == null) {
            mPanoramaShareIntent = new Intent(Intent.ACTION_SEND);
        }
        mPanoramaShareIntent.setType("application/vnd.google.panorama360+jpg");
        mPanoramaShareIntent.putExtra(Intent.EXTRA_STREAM, contentUri);
        if (mPanoramaShareActionProvider != null) {
            mPanoramaShareActionProvider.setShareIntent(mPanoramaShareIntent);
        }
    }

    @Override
    public void onMenuVisibilityChanged(boolean isVisible) {
        // If menu is showing, we need to make sure action bar does not go away.
        mMainHandler.removeMessages(MSG_HIDE_ACTION_BAR);
        if (!isVisible) {
            mMainHandler.sendEmptyMessageDelayed(MSG_HIDE_ACTION_BAR, SHOW_ACTION_BAR_TIMEOUT_MS);
        }
    }

    @Override
    public boolean onShareTargetSelected(ShareActionProvider shareActionProvider, Intent intent) {
        int currentDataId = mFilmstripController.getCurrentId();
        if (currentDataId < 0) {
            return false;
        }
        UsageStatistics.onEvent(UsageStatistics.COMPONENT_CAMERA, UsageStatistics.ACTION_SHARE,
                intent.getComponent().getPackageName(), 0,
                UsageStatistics.hashFileName(fileNameFromDataID(currentDataId)));
        return true;
    }

    /**
     * According to the data type, make the menu items for supported operations
     * visible.
     *
     * @param dataID the data ID of the current item.
     */
    private void updateActionBarMenu(int dataID) {
        LocalData currentData = mDataAdapter.getLocalData(dataID);
        if (currentData == null) {
            return;
        }
        int type = currentData.getLocalDataType();

        if (mActionBarMenu == null) {
            return;
        }

        int supported = 0;

        switch (type) {
            case LocalData.LOCAL_IMAGE:
                supported |= SUPPORT_DELETE | SUPPORT_ROTATE | SUPPORT_INFO
                        | SUPPORT_CROP | SUPPORT_SETAS | SUPPORT_EDIT
                        | SUPPORT_SHARE | SUPPORT_SHOW_ON_MAP;
                break;
            case LocalData.LOCAL_VIDEO:
                supported |= SUPPORT_DELETE | SUPPORT_INFO | SUPPORT_TRIM
                        | SUPPORT_SHARE;
                break;
            case LocalData.LOCAL_PHOTO_SPHERE:
                supported |= SUPPORT_DELETE | SUPPORT_ROTATE | SUPPORT_INFO
                        | SUPPORT_CROP | SUPPORT_SETAS | SUPPORT_EDIT
                        | SUPPORT_SHARE | SUPPORT_SHOW_ON_MAP;
                break;
            case LocalData.LOCAL_360_PHOTO_SPHERE:
                supported |= SUPPORT_DELETE | SUPPORT_ROTATE | SUPPORT_INFO
                        | SUPPORT_CROP | SUPPORT_SETAS | SUPPORT_EDIT
                        | SUPPORT_SHARE | SUPPORT_SHARE_PANORAMA360
                        | SUPPORT_SHOW_ON_MAP;
                break;
            default:
                break;
        }

        // In secure camera mode, we only support delete operation.
        if (isSecureCamera()) {
            supported &= SUPPORT_DELETE;
        }

        setMenuItemVisible(mActionBarMenu, R.id.action_delete,
                (supported & SUPPORT_DELETE) != 0);
        setMenuItemVisible(mActionBarMenu, R.id.action_rotate_ccw,
                (supported & SUPPORT_ROTATE) != 0);
        setMenuItemVisible(mActionBarMenu, R.id.action_rotate_cw,
                (supported & SUPPORT_ROTATE) != 0);
        setMenuItemVisible(mActionBarMenu, R.id.action_details,
                (supported & SUPPORT_INFO) != 0);
        setMenuItemVisible(mActionBarMenu, R.id.action_crop,
                (supported & SUPPORT_CROP) != 0);
        setMenuItemVisible(mActionBarMenu, R.id.action_setas,
                (supported & SUPPORT_SETAS) != 0);
        setMenuItemVisible(mActionBarMenu, R.id.action_edit,
                (supported & SUPPORT_EDIT) != 0);
        setMenuItemVisible(mActionBarMenu, R.id.action_trim,
                (supported & SUPPORT_TRIM) != 0);

        boolean standardShare = (supported & SUPPORT_SHARE) != 0;
        boolean panoramaShare = (supported & SUPPORT_SHARE_PANORAMA360) != 0;
        setMenuItemVisible(mActionBarMenu, R.id.action_share, standardShare);
        setMenuItemVisible(mActionBarMenu, R.id.action_share_panorama, panoramaShare);

        if (panoramaShare) {
            // For 360 PhotoSphere, relegate standard share to the overflow menu
            MenuItem item = mActionBarMenu.findItem(R.id.action_share);
            if (item != null) {
                item.setShowAsAction(MenuItem.SHOW_AS_ACTION_NEVER);
                item.setTitle(getResources().getString(R.string.share_as_photo));
            }
            // And, promote "share as panorama" to action bar
            item = mActionBarMenu.findItem(R.id.action_share_panorama);
            if (item != null) {
                item.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
            }
            setPanoramaShareIntent(currentData.getContentUri());
        }
        if (standardShare) {
            if (!panoramaShare) {
                MenuItem item = mActionBarMenu.findItem(R.id.action_share);
                if (item != null) {
                    item.setShowAsAction(MenuItem.SHOW_AS_ACTION_IF_ROOM);
                    item.setTitle(getResources().getString(R.string.share));
                }
            }
            setStandardShareIntent(currentData.getContentUri(), currentData.getMimeType());
            setNfcBeamPushUri(currentData.getContentUri());
        }

        boolean itemHasLocation = currentData.getLatLong() != null;
        setMenuItemVisible(mActionBarMenu, R.id.action_show_on_map,
                itemHasLocation && (supported & SUPPORT_SHOW_ON_MAP) != 0);
    }

    private void setMenuItemVisible(Menu menu, int itemId, boolean visible) {
        MenuItem item = menu.findItem(itemId);
        if (item != null) {
            item.setVisible(visible);
        }
    }

    private final ImageTaskManager.TaskListener mPlaceholderListener =
            new ImageTaskManager.TaskListener() {

                @Override
                public void onTaskQueued(String filePath, final Uri imageUri) {
                    mMainHandler.post(new Runnable() {
                        @Override
                        public void run() {
                            notifyNewMedia(imageUri);
                            int dataID = mDataAdapter.findDataByContentUri(imageUri);
                            if (dataID != -1) {
                                LocalData d = mDataAdapter.getLocalData(dataID);
                                InProgressDataWrapper newData = new InProgressDataWrapper(d, true);
                                mDataAdapter.updateData(dataID, newData);
                            }
                        }
                    });
                }

                @Override
                public void onTaskDone(String filePath, final Uri imageUri) {
                    mMainHandler.post(new Runnable() {
                        @Override
                        public void run() {
                            mDataAdapter.refresh(getContentResolver(), imageUri);
                        }
                    });
                }

                @Override
                public void onTaskProgress(String filePath, Uri imageUri, int progress) {
                    // Do nothing
                }
            };

    private final ImageTaskManager.TaskListener mStitchingListener =
            new ImageTaskManager.TaskListener() {
                @Override
                public void onTaskQueued(String filePath, final Uri imageUri) {
                    mMainHandler.post(new Runnable() {
                        @Override
                        public void run() {
                            notifyNewMedia(imageUri);
                            int dataID = mDataAdapter.findDataByContentUri(imageUri);
                            if (dataID != -1) {
                                // Don't allow special UI actions (swipe to
                                // delete, for example) on in-progress data.
                                LocalData d = mDataAdapter.getLocalData(dataID);
                                InProgressDataWrapper newData = new InProgressDataWrapper(d);
                                mDataAdapter.updateData(dataID, newData);
                            }
                        }
                    });
                }

                @Override
                public void onTaskDone(String filePath, final Uri imageUri) {
                    Log.v(TAG, "onTaskDone:" + filePath);
                    mMainHandler.post(new Runnable() {
                        @Override
                        public void run() {
                            int doneID = mDataAdapter.findDataByContentUri(imageUri);
                            int currentDataId = mFilmstripController.getCurrentId();

                            if (currentDataId == doneID) {
                                hidePanoStitchingProgress();
                                updateStitchingProgress(0);
                            }

                            mDataAdapter.refresh(getContentResolver(), imageUri);
                        }
                    });
                }

                @Override
                public void onTaskProgress(
                        String filePath, final Uri imageUri, final int progress) {
                    mMainHandler.post(new Runnable() {
                        @Override
                        public void run() {
                            int currentDataId = mFilmstripController.getCurrentId();
                            if (currentDataId == -1) {
                                return;
                            }
                            if (imageUri.equals(
                                    mDataAdapter.getLocalData(currentDataId).getContentUri())) {
                                updateStitchingProgress(progress);
                            }
                        }
                    });
                }
            };

    @Override
    public Context getAndroidContext() {
        return this;
    }

    @Override
    public int getCurrentModuleIndex() {
        return mCurrentModeIndex;
    }

    @Override
    public SurfaceTexture getPreviewBuffer() {
        // TODO: implement this
        return null;
    }

    @Override
    public FrameLayout getModuleLayoutRoot() {
        return mCameraModuleRootView;
    }

    @Override
    public void setShutterEventsListener(ShutterEventsListener listener) {
        // TODO: implement this
    }

    @Override
    public void setShutterEnabled(boolean enabled) {
        // TODO: implement this
    }

    @Override
    public boolean isShutterEnabled() {
        // TODO: implement this
        return false;
    }

    @Override
    public void startPreCaptureAnimation() {
        // TODO: implement this
    }

    @Override
    public void cancelPreCaptureAnimation() {
        // TODO: implement this
    }

    @Override
    public void startPostCaptureAnimation() {
        // TODO: implement this
    }

    @Override
    public void startPostCaptureAnimation(Bitmap thumbnail) {
        // TODO: implement this
    }

    @Override
    public void cancelPostCaptureAnimation() {
        // TODO: implement this
    }

    @Override
    public OrientationManager getOrientationManager() {
        return mOrientationManager;
    }

    @Override
    public LocationManager getLocationManager() {
        return mLocationManager;
    }

    @Override
    public void lockOrientation() {
        mOrientationManager.lockOrientation();
    }

    @Override
    public void unlockOrientation() {
        mOrientationManager.unlockOrientation();
    }

    @Override
    public void notifyNewMedia(Uri uri) {
        ContentResolver cr = getContentResolver();
        String mimeType = cr.getType(uri);
        if (mimeType.startsWith("video/")) {
            sendBroadcast(new Intent(CameraUtil.ACTION_NEW_VIDEO, uri));
            mDataAdapter.addNewVideo(cr, uri);
        } else if (mimeType.startsWith("image/")) {
            CameraUtil.broadcastNewPicture(this, uri);
            mDataAdapter.addNewPhoto(cr, uri);
        } else if (mimeType.startsWith("application/stitching-preview")) {
            mDataAdapter.addNewPhoto(cr, uri);
        } else if (mimeType.startsWith(PlaceholderManager.PLACEHOLDER_MIME_TYPE)) {
            mDataAdapter.addNewPhoto(cr, uri);
        } else {
            android.util.Log.w(TAG, "Unknown new media with MIME type:"
                    + mimeType + ", uri:" + uri);
        }
    }

    @Override
    public void enableKeepScreenOn(boolean enabled) {
        if (mPaused) {
            return;
        }

        mKeepScreenOn = enabled;
        if (mKeepScreenOn) {
            mMainHandler.removeMessages(MSG_CLEAR_SCREEN_ON_FLAG);
            getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        } else {
            keepScreenOnForAWhile();
        }
    }

    @Override
    public CameraProvider getCameraProvider() {
        return mCameraController;
    }

    private void removeData(int dataID) {
        mDataAdapter.removeData(CameraActivity.this, dataID);
        if (mDataAdapter.getTotalNumber() > 1) {
            showUndoDeletionBar();
        } else {
            // If camera preview is the only view left in filmstrip,
            // no need to show undo bar.
            mPendingDeletion = true;
            performDeletion();
        }
    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        // Inflate the menu items for use in the action bar
        MenuInflater inflater = getMenuInflater();
        inflater.inflate(R.menu.operations, menu);
        mActionBarMenu = menu;

        // Configure the standard share action provider
        MenuItem item = menu.findItem(R.id.action_share);
        mStandardShareActionProvider = (ShareActionProvider) item.getActionProvider();
        mStandardShareActionProvider.setShareHistoryFileName("standard_share_history.xml");
        if (mStandardShareIntent != null) {
            mStandardShareActionProvider.setShareIntent(mStandardShareIntent);
        }

        // Configure the panorama share action provider
        item = menu.findItem(R.id.action_share_panorama);
        mPanoramaShareActionProvider = (ShareActionProvider) item.getActionProvider();
        mPanoramaShareActionProvider.setShareHistoryFileName("panorama_share_history.xml");
        if (mPanoramaShareIntent != null) {
            mPanoramaShareActionProvider.setShareIntent(mPanoramaShareIntent);
        }

        mStandardShareActionProvider.setOnShareTargetSelectedListener(this);
        mPanoramaShareActionProvider.setOnShareTargetSelectedListener(this);

        return super.onCreateOptionsMenu(menu);
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int currentDataId = mFilmstripController.getCurrentId();
        if (currentDataId < 0) {
            return false;
        }
        final LocalData localData = mDataAdapter.getLocalData(currentDataId);

        // Handle presses on the action bar items
        switch (item.getItemId()) {
            case android.R.id.home:
                // ActionBar's Up/Home button was clicked
                try {
                    startActivity(IntentHelper.getGalleryIntent(this));
                    return true;
                } catch (ActivityNotFoundException e) {
                    Log.w(TAG, "Failed to launch gallery activity, closing");
                    finish();
                }
            case R.id.action_delete:
                UsageStatistics.onEvent(UsageStatistics.COMPONENT_CAMERA,
                        UsageStatistics.ACTION_DELETE, null, 0,
                        UsageStatistics.hashFileName(fileNameFromDataID(currentDataId)));
                removeData(currentDataId);
                return true;
            case R.id.action_edit:
                UsageStatistics.onEvent(UsageStatistics.COMPONENT_CAMERA,
                        UsageStatistics.ACTION_EDIT, null, 0,
                        UsageStatistics.hashFileName(fileNameFromDataID(currentDataId)));
                launchEditor(localData);
                return true;
            case R.id.action_trim: {
                // This is going to be handled by the Gallery app.
                Intent intent = new Intent(ACTION_TRIM_VIDEO);
                LocalData currentData = mDataAdapter.getLocalData(mFilmstripController.getCurrentId());
                intent.setData(currentData.getContentUri());
                // We need the file path to wrap this into a RandomAccessFile.
                intent.putExtra(MEDIA_ITEM_PATH, currentData.getPath());
                startActivityForResult(intent, REQ_CODE_DONT_SWITCH_TO_PREVIEW);
                return true;
            }
            case R.id.action_rotate_ccw:
                localData.rotate90Degrees(this, mDataAdapter, currentDataId, false);
                return true;
            case R.id.action_rotate_cw:
                localData.rotate90Degrees(this, mDataAdapter, currentDataId, true);
                return true;
            case R.id.action_crop: {
                UsageStatistics.onEvent(UsageStatistics.COMPONENT_CAMERA,
                        UsageStatistics.ACTION_CROP, null, 0,
                        UsageStatistics.hashFileName(fileNameFromDataID(currentDataId)));
                Intent intent = new Intent(CropActivity.CROP_ACTION);
                intent.setClass(this, CropActivity.class);
                intent.setDataAndType(localData.getContentUri(), localData.getMimeType())
                        .setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
                startActivityForResult(intent, REQ_CODE_DONT_SWITCH_TO_PREVIEW);
                return true;
            }
            case R.id.action_setas: {
                Intent intent = new Intent(Intent.ACTION_ATTACH_DATA)
                        .setDataAndType(localData.getContentUri(),
                                localData.getMimeType())
                        .setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
                intent.putExtra("mimeType", intent.getType());
                startActivityForResult(Intent.createChooser(
                        intent, getString(R.string.set_as)), REQ_CODE_DONT_SWITCH_TO_PREVIEW);
                return true;
            }
            case R.id.action_details:
                (new AsyncTask<Void, Void, MediaDetails>() {
                    @Override
                    protected MediaDetails doInBackground(Void... params) {
                        return localData.getMediaDetails(CameraActivity.this);
                    }

                    @Override
                    protected void onPostExecute(MediaDetails mediaDetails) {
                        if (mediaDetails != null) {
                            DetailsDialog.create(CameraActivity.this, mediaDetails).show();
                        }
                    }
                }).execute();
                return true;
            case R.id.action_show_on_map:
                double[] latLong = localData.getLatLong();
                if (latLong != null) {
                    CameraUtil.showOnMap(this, latLong);
                }
                return true;
            default:
                return super.onOptionsItemSelected(item);
        }
    }

    private boolean isCaptureIntent() {
        if (MediaStore.ACTION_VIDEO_CAPTURE.equals(getIntent().getAction())
                || MediaStore.ACTION_IMAGE_CAPTURE.equals(getIntent().getAction())
                || MediaStore.ACTION_IMAGE_CAPTURE_SECURE.equals(getIntent().getAction())) {
            return true;
        } else {
            return false;
        }
    }

    @Override
    public void onCreate(Bundle state) {
        super.onCreate(state);
        GcamHelper.init(getContentResolver());

        getWindow().requestFeature(Window.FEATURE_ACTION_BAR);
        setContentView(R.layout.activity_main);
        mActionBar = getActionBar();
        mActionBar.addOnMenuVisibilityListener(this);
        mMainHandler = new MainHandler(getMainLooper());
        mCameraController =
                new CameraController(this, this, mMainHandler,
                        CameraManagerFactory.getAndroidCameraManager());
        // TODO: Try to move all the resources allocation to happen as soon as
        // possible so we can call module.init() at the earliest time.
        mModuleManager = new ModuleManagerImpl();
        ModulesInfo.setupModules(this, mModuleManager);

        mModeListView = (ModeListView) findViewById(R.id.mode_list_layout);
        if (ApiHelper.HAS_ROTATION_ANIMATION) {
            setRotationAnimation();
        }

        // Check if this is in the secure camera mode.
        Intent intent = getIntent();
        String action = intent.getAction();
        if (INTENT_ACTION_STILL_IMAGE_CAMERA_SECURE.equals(action)
                || ACTION_IMAGE_CAPTURE_SECURE.equals(action)) {
            mSecureCamera = true;
        } else {
            mSecureCamera = intent.getBooleanExtra(SECURE_CAMERA_EXTRA, false);
        }

        if (mSecureCamera) {
            // Change the window flags so that secure camera can show when locked
            Window win = getWindow();
            WindowManager.LayoutParams params = win.getAttributes();
            params.flags |= WindowManager.LayoutParams.FLAG_SHOW_WHEN_LOCKED;
            win.setAttributes(params);

            // Filter for screen off so that we can finish secure camera activity
            // when screen is off.
            IntentFilter filter = new IntentFilter(Intent.ACTION_SCREEN_OFF);
            registerReceiver(mScreenOffReceiver, filter);
        }
        mAboveFilmstripControlLayout =
                (FrameLayout) findViewById(R.id.camera_above_filmstrip_layout);
        mAboveFilmstripControlLayout.setFitsSystemWindows(true);
        // Hide action bar first since we are in full screen mode first, and
        // switch the system UI to lights-out mode.
        this.setSystemBarsVisibility(false);
        mPanoramaManager = AppManagerFactory.getInstance(this)
                .getPanoramaStitchingManager();
        mPlaceholderManager = AppManagerFactory.getInstance(this)
                .getGcamProcessingManager();
        mPanoramaManager.addTaskListener(mStitchingListener);
        mPlaceholderManager.addTaskListener(mPlaceholderListener);
        LayoutInflater inflater = getLayoutInflater();
        View rootLayout = inflater.inflate(R.layout.camera, null, false);
        mCameraModuleRootView = (FrameLayout) rootLayout.findViewById(R.id.camera_app_root);
        mPanoStitchingPanel = findViewById(R.id.pano_stitching_progress_panel);
        mBottomProgress = (ProgressBar) findViewById(R.id.pano_stitching_progress_bar);
        mCameraPreviewData = new CameraPreviewData(rootLayout,
                FilmstripImageData.SIZE_FULL,
                FilmstripImageData.SIZE_FULL);
        // Put a CameraPreviewData at the first position.
        mWrappedDataAdapter = new FixedFirstDataAdapter(
                new CameraDataAdapter(new ColorDrawable(
                        getResources().getColor(R.color.photo_placeholder))),
                mCameraPreviewData);
        mFilmstripController = ((FilmstripView) findViewById(R.id.filmstrip_view)).getController();
        mFilmstripController.setViewGap(
                getResources().getDimensionPixelSize(R.dimen.camera_film_strip_gap));
        mPanoramaViewHelper = new PanoramaViewHelper(this);
        mPanoramaViewHelper.onCreate();
        mFilmstripController.setPanoramaViewHelper(mPanoramaViewHelper);
        // Set up the camera preview first so the preview shows up ASAP.
        mFilmstripController.setListener(mFilmStripListener);

        // TODO: Remove the 3rd parameter once mCameraModuleRoot is moved out of filmstrip
        mCameraAppUI = new CameraAppUI(this,
                (MainActivityLayout) findViewById(R.id.activity_root_view),
                mCameraModuleRootView,
                isSecureCamera(), isCaptureIntent());

        mSettingsManager = new SettingsManager(this, null, mCameraController.getNumberOfCameras());

        mLocationManager = new LocationManager(this,
            new LocationManager.Listener() {
                @Override
                public void showGpsOnScreenIndicator(boolean hasSignal) {
                }

                @Override
                public void hideGpsOnScreenIndicator() {
                }
            });

        mSettingsController = new SettingsController(this, mSettingsManager, mLocationManager);

        int modeIndex = -1;
        if (MediaStore.INTENT_ACTION_VIDEO_CAMERA.equals(getIntent().getAction())
                || MediaStore.ACTION_VIDEO_CAPTURE.equals(getIntent().getAction())) {
            modeIndex = ModeListView.MODE_VIDEO;
        } else if (MediaStore.INTENT_ACTION_STILL_IMAGE_CAMERA.equals(getIntent().getAction())
                || MediaStore.INTENT_ACTION_STILL_IMAGE_CAMERA_SECURE.equals(getIntent()
                        .getAction())) {
            modeIndex = ModeListView.MODE_PHOTO;
            if (mSettingsManager.getInt(new StartupModuleSetting())
                        == ModeListView.MODE_GCAM && GcamHelper.hasGcamCapture()) {
                modeIndex = ModeListView.MODE_GCAM;
            }
        } else if (MediaStore.ACTION_IMAGE_CAPTURE.equals(getIntent().getAction())
                || MediaStore.ACTION_IMAGE_CAPTURE_SECURE.equals(getIntent().getAction())) {
            modeIndex = ModeListView.MODE_PHOTO;
        } else {
            // If the activity has not been started using an explicit intent,
            // read the module index from the last time the user changed modes
            modeIndex = mSettingsManager.getInt(new StartupModuleSetting());
            if ((modeIndex == ModeListView.MODE_GCAM &&
                    !GcamHelper.hasGcamCapture()) || modeIndex < 0) {
                modeIndex = ModeListView.MODE_PHOTO;
            }
        }

        mOrientationManager = new OrientationManagerImpl(this);
        mOrientationManager.addOnOrientationChangeListener(mMainHandler, this);

        setModuleFromModeIndex(modeIndex);

        // TODO: Remove this when refactor is done.
        if (modeIndex == ModulesInfo.MODULE_PHOTO ||
                modeIndex == ModulesInfo.MODULE_VIDEO) {
            mCameraAppUI.prepareModuleUI();
        }
        mCurrentModule.init(this, isSecureCamera(), isCaptureIntent());

        if (!mSecureCamera) {
            mDataAdapter = mWrappedDataAdapter;
            mFilmstripController.setDataAdapter(mDataAdapter);
            if (!isCaptureIntent()) {
                mDataAdapter.requestLoad(getContentResolver());
            }
        } else {
            // Put a lock placeholder as the last image by setting its date to
            // 0.
            ImageView v = (ImageView) getLayoutInflater().inflate(
                    R.layout.secure_album_placeholder, null);
            v.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    try {
                        UsageStatistics.onEvent(UsageStatistics.COMPONENT_CAMERA,
                                UsageStatistics.ACTION_GALLERY, null);
                        startActivity(IntentHelper.getGalleryIntent(CameraActivity.this));
                    } catch (ActivityNotFoundException e) {
                        Log.w(TAG, "Failed to launch gallery activity, closing");
                    }
                    finish();
                }
            });
            mDataAdapter = new FixedLastDataAdapter(
                    mWrappedDataAdapter,
                    new SimpleViewData(
                            v,
                            v.getDrawable().getIntrinsicWidth(),
                            v.getDrawable().getIntrinsicHeight(),
                            0, 0));
            // Flush out all the original data.
            mDataAdapter.flush();
            mFilmstripController.setDataAdapter(mDataAdapter);
        }

        setupNfcBeamPush();

        mLocalImagesObserver = new LocalMediaObserver();
        mLocalVideosObserver = new LocalMediaObserver();

        getContentResolver().registerContentObserver(
                MediaStore.Images.Media.EXTERNAL_CONTENT_URI, true,
                mLocalImagesObserver);
        getContentResolver().registerContentObserver(
                MediaStore.Video.Media.EXTERNAL_CONTENT_URI, true,
                mLocalVideosObserver);
    }

    private void setRotationAnimation() {
        int rotationAnimation = WindowManager.LayoutParams.ROTATION_ANIMATION_ROTATE;
        rotationAnimation = WindowManager.LayoutParams.ROTATION_ANIMATION_CROSSFADE;
        Window win = getWindow();
        WindowManager.LayoutParams winParams = win.getAttributes();
        winParams.rotationAnimation = rotationAnimation;
        win.setAttributes(winParams);
    }

    @Override
    public void onUserInteraction() {
        super.onUserInteraction();
        if (!isFinishing()) {
            keepScreenOnForAWhile();
        }
    }

    @Override
    public boolean dispatchTouchEvent(MotionEvent ev) {
        boolean result = super.dispatchTouchEvent(ev);
        if (ev.getActionMasked() == MotionEvent.ACTION_DOWN) {
            // Real deletion is postponed until the next user interaction after
            // the gesture that triggers deletion. Until real deletion is performed,
            // users can click the undo button to bring back the image that they
            // chose to delete.
            if (mPendingDeletion && !mIsUndoingDeletion) {
                performDeletion();
            }
        }
        return result;
    }

    @Override
    public void onPause() {
        mPaused = true;

        // Delete photos that are pending deletion
        performDeletion();
        // TODO: call mCurrentModule.pause() instead after all the modules
        // support pause().
        mCurrentModule.pause();
        mOrientationManager.pause();
        // Close the camera and wait for the operation done.
        mCameraController.closeCamera();

        mLocalImagesObserver.setActivityPaused(true);
        mLocalVideosObserver.setActivityPaused(true);
        resetScreenOn();
        super.onPause();
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (requestCode == REQ_CODE_DONT_SWITCH_TO_PREVIEW) {
            mResetToPreviewOnResume = false;
        } else {
            super.onActivityResult(requestCode, resultCode, data);
        }
    }

    @Override
    public void onResume() {
        mPaused = false;

        // TODO: Handle this in OrientationManager.
        // Auto-rotate off
        if (Settings.System.getInt(getContentResolver(),
                Settings.System.ACCELEROMETER_ROTATION, 0) == 0) {
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_UNSPECIFIED);
            mAutoRotateScreen = false;
        } else {
            setRequestedOrientation(ActivityInfo.SCREEN_ORIENTATION_FULL_SENSOR);
            mAutoRotateScreen = true;
        }

        UsageStatistics.onEvent(UsageStatistics.COMPONENT_CAMERA,
                UsageStatistics.ACTION_FOREGROUNDED, this.getClass().getSimpleName());

        mOrientationManager.resume();
        super.onResume();
        mCurrentModule.resume();

        setSwipingEnabled(true);

        if (mResetToPreviewOnResume) {
            // Go to the preview on resume.
            mFilmstripController.goToFirstItem();
        }
        // Default is showing the preview, unless disabled by explicitly
        // starting an activity we want to return from to the filmstrip rather
        // than the preview.
        mResetToPreviewOnResume = true;

        if (mLocalVideosObserver.isMediaDataChangedDuringPause()
                || mLocalImagesObserver.isMediaDataChangedDuringPause()) {
            if (!mSecureCamera) {
                // If it's secure camera, requestLoad() should not be called
                // as it will load all the data.
                mDataAdapter.requestLoad(getContentResolver());
            }
        }
        mLocalImagesObserver.setActivityPaused(false);
        mLocalVideosObserver.setActivityPaused(false);

        keepScreenOnForAWhile();

        mModeListView.startAccordionAnimation();
    }

    @Override
    public void onStart() {
        super.onStart();
        mPanoramaViewHelper.onStart();
    }

    @Override
    protected void onStop() {
        mPanoramaViewHelper.onStop();

        CameraManagerFactory.recycle();
        super.onStop();
    }

    @Override
    public void onDestroy() {
        if (mSecureCamera) {
            unregisterReceiver(mScreenOffReceiver);
        }
        getContentResolver().unregisterContentObserver(mLocalImagesObserver);
        getContentResolver().unregisterContentObserver(mLocalVideosObserver);
        super.onDestroy();
    }

    @Override
    public void onConfigurationChanged(Configuration config) {
        super.onConfigurationChanged(config);
        mCurrentModule.onConfigurationChanged(config);
    }

    @Override
    public boolean onKeyDown(int keyCode, KeyEvent event) {
        if (mFilmstripController.inCameraFullscreen()) {
            if (mCurrentModule.onKeyDown(keyCode, event)) {
                return true;
            }
            // Prevent software keyboard or voice search from showing up.
            if (keyCode == KeyEvent.KEYCODE_SEARCH
                    || keyCode == KeyEvent.KEYCODE_MENU) {
                if (event.isLongPress()) {
                    return true;
                }
            }
        }

        return super.onKeyDown(keyCode, event);
    }

    @Override
    public boolean onKeyUp(int keyCode, KeyEvent event) {
        if (mFilmstripController.inCameraFullscreen() && mCurrentModule.onKeyUp(keyCode, event)) {
            return true;
        }
        return super.onKeyUp(keyCode, event);
    }

    @Override
    public void onBackPressed() {
        if (!mFilmstripController.inCameraFullscreen()) {
            mFilmstripController.goToFirstItem();
        } else if (!mCurrentModule.onBackPressed()) {
            super.onBackPressed();
        }
    }

    public boolean isAutoRotateScreen() {
        return mAutoRotateScreen;
    }

    protected void updateStorageSpace() {
        mStorageSpaceBytes = Storage.getAvailableSpace();
    }

    protected long getStorageSpaceBytes() {
        return mStorageSpaceBytes;
    }

    protected void updateStorageSpaceAndHint() {
        updateStorageSpace();
        updateStorageHint(mStorageSpaceBytes);
    }

    protected void updateStorageHint(long storageSpace) {
        String message = null;
        if (storageSpace == Storage.UNAVAILABLE) {
            message = getString(R.string.no_storage);
        } else if (storageSpace == Storage.PREPARING) {
            message = getString(R.string.preparing_sd);
        } else if (storageSpace == Storage.UNKNOWN_SIZE) {
            message = getString(R.string.access_sd_fail);
        } else if (storageSpace <= Storage.LOW_STORAGE_THRESHOLD_BYTES) {
            message = getString(R.string.spaceIsLow_content);
        }

        if (message != null) {
            if (mStorageHint == null) {
                mStorageHint = OnScreenHint.makeText(this, message);
            } else {
                mStorageHint.setText(message);
            }
            mStorageHint.show();
        } else if (mStorageHint != null) {
            mStorageHint.cancel();
            mStorageHint = null;
        }
    }

    protected void setResultEx(int resultCode) {
        mResultCodeForTesting = resultCode;
        setResult(resultCode);
    }

    protected void setResultEx(int resultCode, Intent data) {
        mResultCodeForTesting = resultCode;
        mResultDataForTesting = data;
        setResult(resultCode, data);
    }

    public int getResultCode() {
        return mResultCodeForTesting;
    }

    public Intent getResultData() {
        return mResultDataForTesting;
    }

    public boolean isSecureCamera() {
        return mSecureCamera;
    }

    @Override
    public boolean isPaused() {
        return mPaused;
    }

    @Override
    public void onModeSelected(int modeIndex) {
        if (mCurrentModeIndex == modeIndex) {
            return;
        }

        if (modeIndex == ModeListView.MODE_SETTING) {
            onSettingsSelected();
            return;
        }

        CameraHolder.instance().keep();
        closeModule(mCurrentModule);
        int oldModuleIndex = mCurrentModeIndex;
        setModuleFromModeIndex(modeIndex);

        // TODO: The following check is temporary for quick switch between video and photo.
        // When the refactor is done, similar logic will be applied to all modules.
        if (mCurrentModeIndex == ModulesInfo.MODULE_PHOTO
                || mCurrentModeIndex == ModulesInfo.MODULE_VIDEO) {
            if (oldModuleIndex != ModulesInfo.MODULE_PHOTO
                    && oldModuleIndex != ModulesInfo.MODULE_VIDEO) {
                mCameraAppUI.prepareModuleUI();
            } else {
                mCameraAppUI.clearModuleUI();
            }
        } else {
            // This is the old way of removing all views in CameraRootView. Will
            // be deprecated soon. It is here to make sure modules that haven't
            // been refactored can still function.
            mCameraAppUI.clearCameraUI();
        }

        openModule(mCurrentModule);
        mCurrentModule.onOrientationChanged(mLastRawOrientation);
        if (mMediaSaver != null) {
            mCurrentModule.onMediaSaverAvailable(mMediaSaver);
        }
        // Store the module index so we can use it the next time the Camera
        // starts up.
        SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
        prefs.edit().putInt(CameraSettings.KEY_STARTUP_MODULE_INDEX, modeIndex).apply();
    }

    public void onSettingsSelected() {
        // Temporary until we finalize the touch flow.
        LayoutInflater inflater = getLayoutInflater();
        SettingsView settingsView = (SettingsView) inflater.inflate(R.layout.settings_list_layout,
            null, false);
        settingsView.setSettingsListener(mSettingsController);
        PopupWindow popup = new PopupWindow(LayoutParams.WRAP_CONTENT, LayoutParams.WRAP_CONTENT);
        popup.setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
        popup.setOutsideTouchable(true);
        popup.setFocusable(true);
        popup.setContentView(settingsView);
        popup.showAtLocation(mModeListView.getRootView(), Gravity.CENTER, 0, 0);
    }

    /**
     * Sets the mCurrentModuleIndex, creates a new module instance for the given
     * index an sets it as mCurrentModule.
     */
    private void setModuleFromModeIndex(int modeIndex) {
        ModuleManagerImpl.ModuleAgent agent = mModuleManager.getModuleAgent(modeIndex);
        if (agent == null) {
            return;
        }
        if (!agent.requestAppForCamera()) {
            mCameraController.closeCamera();
        }
        mCurrentModeIndex = agent.getModuleId();
        mCurrentModule = (CameraModule)  agent.createModule(this);
    }

    @Override
    public SettingsManager getSettingsManager() {
        return mSettingsManager;
    }

    @Override
    public CameraServices getServices() {
        return (CameraServices) getApplication();
    }

    @Override
    public SettingsController getSettingsController() {
        return mSettingsController;
    }

    /**
     * Launches an ACTION_EDIT intent for the given local data item.
     */
    public void launchEditor(LocalData data) {
        Intent intent = new Intent(Intent.ACTION_EDIT)
                .setDataAndType(data.getContentUri(), data.getMimeType())
                .setFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        try {
            startActivityForResult(intent, REQ_CODE_DONT_SWITCH_TO_PREVIEW);
        } catch (ActivityNotFoundException e) {
            startActivityForResult(Intent.createChooser(intent, null),
                    REQ_CODE_DONT_SWITCH_TO_PREVIEW);
        }
    }

    /**
     * Launch the tiny planet editor.
     *
     * @param data The data must be a 360 degree stereographically mapped
     *             panoramic image. It will not be modified, instead a new item
     *             with the result will be added to the filmstrip.
     */
    public void launchTinyPlanetEditor(LocalData data) {
        TinyPlanetFragment fragment = new TinyPlanetFragment();
        Bundle bundle = new Bundle();
        bundle.putString(TinyPlanetFragment.ARGUMENT_URI, data.getContentUri().toString());
        bundle.putString(TinyPlanetFragment.ARGUMENT_TITLE, data.getTitle());
        fragment.setArguments(bundle);
        fragment.show(getFragmentManager(), "tiny_planet");
    }

    private void openModule(CameraModule module) {
        module.init(this, isSecureCamera(), isCaptureIntent());
        module.resume();
    }

    private void closeModule(CameraModule module) {
        module.pause();
    }

    private void performDeletion() {
        if (!mPendingDeletion) {
            return;
        }
        hideUndoDeletionBar(false);
        mDataAdapter.executeDeletion(CameraActivity.this);

        int currentId = mFilmstripController.getCurrentId();
        updateActionBarMenu(currentId);
        mFilmStripListener.onCurrentDataCentered(currentId);
    }

    public void showUndoDeletionBar() {
        if (mPendingDeletion) {
            performDeletion();
        }
        Log.v(TAG, "showing undo bar");
        mPendingDeletion = true;
        if (mUndoDeletionBar == null) {
            ViewGroup v = (ViewGroup) getLayoutInflater().inflate(R.layout.undo_bar,
                    mAboveFilmstripControlLayout, true);
            mUndoDeletionBar = (ViewGroup) v.findViewById(R.id.camera_undo_deletion_bar);
            View button = mUndoDeletionBar.findViewById(R.id.camera_undo_deletion_button);
            button.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View view) {
                    mDataAdapter.undoDataRemoval();
                    hideUndoDeletionBar(true);
                }
            });
            // Setting undo bar clickable to avoid touch events going through
            // the bar to the buttons (eg. edit button, etc) underneath the bar.
            mUndoDeletionBar.setClickable(true);
            // When there is user interaction going on with the undo button, we
            // do not want to hide the undo bar.
            button.setOnTouchListener(new View.OnTouchListener() {
                @Override
                public boolean onTouch(View v, MotionEvent event) {
                    if (event.getActionMasked() == MotionEvent.ACTION_DOWN) {
                        mIsUndoingDeletion = true;
                    } else if (event.getActionMasked() == MotionEvent.ACTION_UP) {
                        mIsUndoingDeletion = false;
                    }
                    return false;
                }
            });
        }
        mUndoDeletionBar.setAlpha(0f);
        mUndoDeletionBar.setVisibility(View.VISIBLE);
        mUndoDeletionBar.animate().setDuration(200).alpha(1f).setListener(null).start();
    }

    private void hideUndoDeletionBar(boolean withAnimation) {
        Log.v(TAG, "Hiding undo deletion bar");
        mPendingDeletion = false;
        if (mUndoDeletionBar != null) {
            if (withAnimation) {
                mUndoDeletionBar.animate().setDuration(200).alpha(0f)
                        .setListener(new Animator.AnimatorListener() {
                            @Override
                            public void onAnimationStart(Animator animation) {
                                // Do nothing.
                            }

                            @Override
                            public void onAnimationEnd(Animator animation) {
                                mUndoDeletionBar.setVisibility(View.GONE);
                            }

                            @Override
                            public void onAnimationCancel(Animator animation) {
                                // Do nothing.
                            }

                            @Override
                            public void onAnimationRepeat(Animator animation) {
                                // Do nothing.
                            }
                        }).start();
            } else {
                mUndoDeletionBar.setVisibility(View.GONE);
            }
        }
    }

    @Override
    public void onOrientationChanged(int orientation) {
        // We keep the last known orientation. So if the user first orient
        // the camera then point the camera to floor or sky, we still have
        // the correct orientation.
        if (orientation == OrientationManager.ORIENTATION_UNKNOWN) {
            return;
        }
        mLastRawOrientation = orientation;
        if (mCurrentModule != null) {
            mCurrentModule.onOrientationChanged(orientation);
        }
    }

    /**
     * Enable/disable swipe-to-filmstrip. Will always disable swipe if in
     * capture intent.
     *
     * @param enable {@code true} to enable swipe.
     */
    public void setSwipingEnabled(boolean enable) {
        if (isCaptureIntent()) {
            mCameraPreviewData.lockPreview(true);
        } else {
            mCameraPreviewData.lockPreview(!enable);
        }
    }


    /**
     * Check whether camera controls are visible.
     *
     * @return whether controls are visible.
     */
    private boolean arePreviewControlsVisible() {
        return mCurrentModule.arePreviewControlsVisible();
    }

    /**
     * Show or hide the {@link CameraControls} using the current module's
     * implementation of {@link #onPreviewFocusChanged}.
     *
     * @param showControls whether to show camera controls.
     */
    private void setPreviewControlsVisibility(boolean showControls) {
        mCurrentModule.onPreviewFocusChanged(showControls);
    }

    // Accessor methods for getting latency times used in performance testing
    public long getAutoFocusTime() {
        return (mCurrentModule instanceof PhotoModule) ?
                ((PhotoModule) mCurrentModule).mAutoFocusTime : -1;
    }

    public long getShutterLag() {
        return (mCurrentModule instanceof PhotoModule) ?
                ((PhotoModule) mCurrentModule).mShutterLag : -1;
    }

    public long getShutterToPictureDisplayedTime() {
        return (mCurrentModule instanceof PhotoModule) ?
                ((PhotoModule) mCurrentModule).mShutterToPictureDisplayedTime : -1;
    }

    public long getPictureDisplayedToJpegCallbackTime() {
        return (mCurrentModule instanceof PhotoModule) ?
                ((PhotoModule) mCurrentModule).mPictureDisplayedToJpegCallbackTime : -1;
    }

    public long getJpegCallbackFinishTime() {
        return (mCurrentModule instanceof PhotoModule) ?
                ((PhotoModule) mCurrentModule).mJpegCallbackFinishTime : -1;
    }

    public long getCaptureStartTime() {
        return (mCurrentModule instanceof PhotoModule) ?
                ((PhotoModule) mCurrentModule).mCaptureStartTime : -1;
    }

    public boolean isRecording() {
        return (mCurrentModule instanceof VideoModule) ?
                ((VideoModule) mCurrentModule).isRecording() : false;
    }

    public CameraManager.CameraOpenCallback getCameraOpenErrorCallback() {
        return mCameraController;
    }

    // For debugging purposes only.
    public CameraModule getCurrentModule() {
        return mCurrentModule;
    }

    private void keepScreenOnForAWhile() {
        if (mKeepScreenOn) {
            return;
        }
        mMainHandler.removeMessages(MSG_CLEAR_SCREEN_ON_FLAG);
        getWindow().addFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
        mMainHandler.sendEmptyMessageDelayed(MSG_CLEAR_SCREEN_ON_FLAG, SCREEN_DELAY_MS);
    }

    private void resetScreenOn() {
        mKeepScreenOn = false;
        mMainHandler.removeMessages(MSG_CLEAR_SCREEN_ON_FLAG);
        getWindow().clearFlags(WindowManager.LayoutParams.FLAG_KEEP_SCREEN_ON);
    }
}