src/com/android/launcher3/BaseDraggingActivity.java - platform/packages/apps/Launcher3 - Git at Google

 /*
  * Copyright (C) 2018 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.launcher3;

 import android.app.ActivityOptions;
 import android.content.ActivityNotFoundException;
 import android.content.Context;
 import android.content.ContextWrapper;
 import android.content.Intent;
 import android.graphics.Rect;
 import android.os.Bundle;
 import android.os.Process;
 import android.os.StrictMode;
 import android.os.UserHandle;
 import android.util.Log;
 import android.view.ActionMode;
 import android.view.Surface;
 import android.view.View;
 import android.widget.Toast;

 import com.android.launcher3.LauncherSettings.Favorites;
 import com.android.launcher3.badge.BadgeInfo;
 import com.android.launcher3.compat.LauncherAppsCompat;
 import com.android.launcher3.uioverrides.DisplayRotationListener;
 import com.android.launcher3.uioverrides.WallpaperColorInfo;
 import com.android.launcher3.shortcuts.DeepShortcutManager;
 import com.android.launcher3.views.BaseDragLayer;

 /**
  * Extension of BaseActivity allowing support for drag-n-drop
  */
 public abstract class BaseDraggingActivity extends BaseActivity
         implements WallpaperColorInfo.OnChangeListener {

     private static final String TAG = "BaseDraggingActivity";

     // The Intent extra that defines whether to ignore the launch animation
     public static final String INTENT_EXTRA_IGNORE_LAUNCH_ANIMATION =
             "com.android.launcher3.intent.extra.shortcut.INGORE_LAUNCH_ANIMATION";

     // When starting an action mode, setting this tag will cause the action mode to be cancelled
     // automatically when user interacts with the launcher.
     public static final Object AUTO_CANCEL_ACTION_MODE = new Object();

     private ActionMode mCurrentActionMode;
     protected boolean mIsSafeModeEnabled;

     private OnStartCallback mOnStartCallback;

     private int mThemeRes = R.style.LauncherTheme;

     private DisplayRotationListener mRotationListener;

     @Override
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
         mIsSafeModeEnabled = getPackageManager().isSafeMode();
         mRotationListener = new DisplayRotationListener(this, this::onDeviceRotationChanged);

         // Update theme
         WallpaperColorInfo wallpaperColorInfo = WallpaperColorInfo.getInstance(this);
         wallpaperColorInfo.addOnChangeListener(this);
         int themeRes = getThemeRes(wallpaperColorInfo);
         if (themeRes != mThemeRes) {
             mThemeRes = themeRes;
             setTheme(themeRes);
         }
     }

     @Override
     public void onExtractedColorsChanged(WallpaperColorInfo wallpaperColorInfo) {
         if (mThemeRes != getThemeRes(wallpaperColorInfo)) {
             recreate();
         }
     }

     protected int getThemeRes(WallpaperColorInfo wallpaperColorInfo) {
         if (wallpaperColorInfo.isDark()) {
             return wallpaperColorInfo.supportsDarkText() ?
                     R.style.LauncherThemeDark_DarKText : R.style.LauncherThemeDark;
         } else {
             return wallpaperColorInfo.supportsDarkText() ?
                     R.style.LauncherTheme_DarkText : R.style.LauncherTheme;
         }
     }

     @Override
     public void onActionModeStarted(ActionMode mode) {
         super.onActionModeStarted(mode);
         mCurrentActionMode = mode;
     }

     @Override
     public void onActionModeFinished(ActionMode mode) {
         super.onActionModeFinished(mode);
         mCurrentActionMode = null;
     }

     public boolean finishAutoCancelActionMode() {
         if (mCurrentActionMode != null && AUTO_CANCEL_ACTION_MODE == mCurrentActionMode.getTag()) {
             mCurrentActionMode.finish();
             return true;
         }
         return false;
     }

     public abstract BaseDragLayer getDragLayer();

     public abstract <T extends View> T getOverviewPanel();

     public abstract View getRootView();

     public abstract BadgeInfo getBadgeInfoForItem(ItemInfo info);

     public abstract void invalidateParent(ItemInfo info);

     public static BaseDraggingActivity fromContext(Context context) {
         if (context instanceof BaseDraggingActivity) {
             return (BaseDraggingActivity) context;
         }
         return ((BaseDraggingActivity) ((ContextWrapper) context).getBaseContext());
     }

     public Rect getViewBounds(View v) {
         int[] pos = new int[2];
         v.getLocationOnScreen(pos);
         return new Rect(pos[0], pos[1], pos[0] + v.getWidth(), pos[1] + v.getHeight());
     }

     public final Bundle getActivityLaunchOptionsAsBundle(View v) {
         ActivityOptions activityOptions = getActivityLaunchOptions(v);
         return activityOptions == null ? null : activityOptions.toBundle();
     }

     public abstract ActivityOptions getActivityLaunchOptions(View v);

     public boolean startActivitySafely(View v, Intent intent, ItemInfo item) {
         if (mIsSafeModeEnabled && !Utilities.isSystemApp(this, intent)) {
             Toast.makeText(this, R.string.safemode_shortcut_error, Toast.LENGTH_SHORT).show();
             return false;
         }

         // Only launch using the new animation if the shortcut has not opted out (this is a
         // private contract between launcher and may be ignored in the future).
         boolean useLaunchAnimation = (v != null) &&
                 !intent.hasExtra(INTENT_EXTRA_IGNORE_LAUNCH_ANIMATION);
         Bundle optsBundle = useLaunchAnimation
                 ? getActivityLaunchOptionsAsBundle(v)
                 : null;

         UserHandle user = item == null ? null : item.user;

         // Prepare intent
         intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
         if (v != null) {
             intent.setSourceBounds(getViewBounds(v));
         }
         try {
             boolean isShortcut = Utilities.ATLEAST_MARSHMALLOW
                     && (item instanceof ShortcutInfo)
                     && (item.itemType == Favorites.ITEM_TYPE_SHORTCUT
                     || item.itemType == Favorites.ITEM_TYPE_DEEP_SHORTCUT)
                     && !((ShortcutInfo) item).isPromise();
             if (isShortcut) {
                 // Shortcuts need some special checks due to legacy reasons.
                 startShortcutIntentSafely(intent, optsBundle, item);
             } else if (user == null || user.equals(Process.myUserHandle())) {
                 // Could be launching some bookkeeping activity
                 startActivity(intent, optsBundle);
             } else {
                 LauncherAppsCompat.getInstance(this).startActivityForProfile(
                         intent.getComponent(), user, intent.getSourceBounds(), optsBundle);
             }
             getUserEventDispatcher().logAppLaunch(v, intent);
             return true;
         } catch (ActivityNotFoundException|SecurityException e) {
             Toast.makeText(this, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
             Log.e(TAG, "Unable to launch. tag=" + item + " intent=" + intent, e);
         }
         return false;
     }

     private void startShortcutIntentSafely(Intent intent, Bundle optsBundle, ItemInfo info) {
         try {
             StrictMode.VmPolicy oldPolicy = StrictMode.getVmPolicy();
             try {
                 // Temporarily disable deathPenalty on all default checks. For eg, shortcuts
                 // containing file Uri's would cause a crash as penaltyDeathOnFileUriExposure
                 // is enabled by default on NYC.
                 StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder().detectAll()
                         .penaltyLog().build());

                 if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT) {
                     String id = ((ShortcutInfo) info).getDeepShortcutId();
                     String packageName = intent.getPackage();
                     DeepShortcutManager.getInstance(this).startShortcut(
                             packageName, id, intent.getSourceBounds(), optsBundle, info.user);
                 } else {
                     // Could be launching some bookkeeping activity
                     startActivity(intent, optsBundle);
                 }
             } finally {
                 StrictMode.setVmPolicy(oldPolicy);
             }
         } catch (SecurityException e) {
             if (!onErrorStartingShortcut(intent, info)) {
                 throw e;
             }
         }
     }

     protected boolean onErrorStartingShortcut(Intent intent, ItemInfo info) {
         return false;
     }

     @Override
     protected void onStart() {
         super.onStart();

         if (mOnStartCallback != null) {
             mOnStartCallback.onActivityStart(this);
             mOnStartCallback = null;
         }
     }

     @Override
     protected void onDestroy() {
         super.onDestroy();
         WallpaperColorInfo.getInstance(this).removeOnChangeListener(this);
         mRotationListener.disable();
     }

     public <T extends BaseDraggingActivity> void setOnStartCallback(OnStartCallback<T> callback) {
         mOnStartCallback = callback;
     }

     protected void onDeviceProfileInitiated() {
         if (mDeviceProfile.isVerticalBarLayout()) {
             mRotationListener.enable();
             mDeviceProfile.updateIsSeascape(getWindowManager());
         } else {
             mRotationListener.disable();
         }
     }

     private void onDeviceRotationChanged() {
         if (mDeviceProfile.updateIsSeascape(getWindowManager())) {
             reapplyUi();
         }
     }

     protected abstract void reapplyUi();

     /**
      * Callback for listening for onStart
      */
     public interface OnStartCallback<T extends BaseDraggingActivity> {

         void onActivityStart(T activity);
     }
 }
	/*
	* Copyright (C) 2018 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.launcher3;

	import android.app.ActivityOptions;
	import android.content.ActivityNotFoundException;
	import android.content.Context;
	import android.content.ContextWrapper;
	import android.content.Intent;
	import android.graphics.Rect;
	import android.os.Bundle;
	import android.os.Process;
	import android.os.StrictMode;
	import android.os.UserHandle;
	import android.util.Log;
	import android.view.ActionMode;
	import android.view.Surface;
	import android.view.View;
	import android.widget.Toast;

	import com.android.launcher3.LauncherSettings.Favorites;
	import com.android.launcher3.badge.BadgeInfo;
	import com.android.launcher3.compat.LauncherAppsCompat;
	import com.android.launcher3.uioverrides.DisplayRotationListener;
	import com.android.launcher3.uioverrides.WallpaperColorInfo;
	import com.android.launcher3.shortcuts.DeepShortcutManager;
	import com.android.launcher3.views.BaseDragLayer;

	/**
	* Extension of BaseActivity allowing support for drag-n-drop
	*/
	public abstract class BaseDraggingActivity extends BaseActivity
	implements WallpaperColorInfo.OnChangeListener {

	private static final String TAG = "BaseDraggingActivity";

	// The Intent extra that defines whether to ignore the launch animation
	public static final String INTENT_EXTRA_IGNORE_LAUNCH_ANIMATION =
	"com.android.launcher3.intent.extra.shortcut.INGORE_LAUNCH_ANIMATION";

	// When starting an action mode, setting this tag will cause the action mode to be cancelled
	// automatically when user interacts with the launcher.
	public static final Object AUTO_CANCEL_ACTION_MODE = new Object();

	private ActionMode mCurrentActionMode;
	protected boolean mIsSafeModeEnabled;

	private OnStartCallback mOnStartCallback;

	private int mThemeRes = R.style.LauncherTheme;

	private DisplayRotationListener mRotationListener;

	@Override
	protected void onCreate(Bundle savedInstanceState) {
	super.onCreate(savedInstanceState);
	mIsSafeModeEnabled = getPackageManager().isSafeMode();
	mRotationListener = new DisplayRotationListener(this, this::onDeviceRotationChanged);

	// Update theme
	WallpaperColorInfo wallpaperColorInfo = WallpaperColorInfo.getInstance(this);
	wallpaperColorInfo.addOnChangeListener(this);
	int themeRes = getThemeRes(wallpaperColorInfo);
	if (themeRes != mThemeRes) {
	mThemeRes = themeRes;
	setTheme(themeRes);
	}
	}

	@Override
	public void onExtractedColorsChanged(WallpaperColorInfo wallpaperColorInfo) {
	if (mThemeRes != getThemeRes(wallpaperColorInfo)) {
	recreate();
	}
	}

	protected int getThemeRes(WallpaperColorInfo wallpaperColorInfo) {
	if (wallpaperColorInfo.isDark()) {
	return wallpaperColorInfo.supportsDarkText() ?
	R.style.LauncherThemeDark_DarKText : R.style.LauncherThemeDark;
	} else {
	return wallpaperColorInfo.supportsDarkText() ?
	R.style.LauncherTheme_DarkText : R.style.LauncherTheme;
	}
	}

	@Override
	public void onActionModeStarted(ActionMode mode) {
	super.onActionModeStarted(mode);
	mCurrentActionMode = mode;
	}

	@Override
	public void onActionModeFinished(ActionMode mode) {
	super.onActionModeFinished(mode);
	mCurrentActionMode = null;
	}

	public boolean finishAutoCancelActionMode() {
	if (mCurrentActionMode != null && AUTO_CANCEL_ACTION_MODE == mCurrentActionMode.getTag()) {
	mCurrentActionMode.finish();
	return true;
	}
	return false;
	}

	public abstract BaseDragLayer getDragLayer();

	public abstract <T extends View> T getOverviewPanel();

	public abstract View getRootView();

	public abstract BadgeInfo getBadgeInfoForItem(ItemInfo info);

	public abstract void invalidateParent(ItemInfo info);

	public static BaseDraggingActivity fromContext(Context context) {
	if (context instanceof BaseDraggingActivity) {
	return (BaseDraggingActivity) context;
	}
	return ((BaseDraggingActivity) ((ContextWrapper) context).getBaseContext());
	}

	public Rect getViewBounds(View v) {
	int[] pos = new int[2];
	v.getLocationOnScreen(pos);
	return new Rect(pos[0], pos[1], pos[0] + v.getWidth(), pos[1] + v.getHeight());
	}

	public final Bundle getActivityLaunchOptionsAsBundle(View v) {
	ActivityOptions activityOptions = getActivityLaunchOptions(v);
	return activityOptions == null ? null : activityOptions.toBundle();
	}

	public abstract ActivityOptions getActivityLaunchOptions(View v);

	public boolean startActivitySafely(View v, Intent intent, ItemInfo item) {
	if (mIsSafeModeEnabled && !Utilities.isSystemApp(this, intent)) {
	Toast.makeText(this, R.string.safemode_shortcut_error, Toast.LENGTH_SHORT).show();
	return false;
	}

	// Only launch using the new animation if the shortcut has not opted out (this is a
	// private contract between launcher and may be ignored in the future).
	boolean useLaunchAnimation = (v != null) &&
	!intent.hasExtra(INTENT_EXTRA_IGNORE_LAUNCH_ANIMATION);
	Bundle optsBundle = useLaunchAnimation
	? getActivityLaunchOptionsAsBundle(v)
	: null;

	UserHandle user = item == null ? null : item.user;

	// Prepare intent
	intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
	if (v != null) {
	intent.setSourceBounds(getViewBounds(v));
	}
	try {
	boolean isShortcut = Utilities.ATLEAST_MARSHMALLOW
	&& (item instanceof ShortcutInfo)
	&& (item.itemType == Favorites.ITEM_TYPE_SHORTCUT
	\|\| item.itemType == Favorites.ITEM_TYPE_DEEP_SHORTCUT)
	&& !((ShortcutInfo) item).isPromise();
	if (isShortcut) {
	// Shortcuts need some special checks due to legacy reasons.
	startShortcutIntentSafely(intent, optsBundle, item);
	} else if (user == null \|\| user.equals(Process.myUserHandle())) {
	// Could be launching some bookkeeping activity
	startActivity(intent, optsBundle);
	} else {
	LauncherAppsCompat.getInstance(this).startActivityForProfile(
	intent.getComponent(), user, intent.getSourceBounds(), optsBundle);
	}
	getUserEventDispatcher().logAppLaunch(v, intent);
	return true;
	} catch (ActivityNotFoundException\|SecurityException e) {
	Toast.makeText(this, R.string.activity_not_found, Toast.LENGTH_SHORT).show();
	Log.e(TAG, "Unable to launch. tag=" + item + " intent=" + intent, e);
	}
	return false;
	}

	private void startShortcutIntentSafely(Intent intent, Bundle optsBundle, ItemInfo info) {
	try {
	StrictMode.VmPolicy oldPolicy = StrictMode.getVmPolicy();
	try {
	// Temporarily disable deathPenalty on all default checks. For eg, shortcuts
	// containing file Uri's would cause a crash as penaltyDeathOnFileUriExposure
	// is enabled by default on NYC.
	StrictMode.setVmPolicy(new StrictMode.VmPolicy.Builder().detectAll()
	.penaltyLog().build());

	if (info.itemType == LauncherSettings.Favorites.ITEM_TYPE_DEEP_SHORTCUT) {
	String id = ((ShortcutInfo) info).getDeepShortcutId();
	String packageName = intent.getPackage();
	DeepShortcutManager.getInstance(this).startShortcut(
	packageName, id, intent.getSourceBounds(), optsBundle, info.user);
	} else {
	// Could be launching some bookkeeping activity
	startActivity(intent, optsBundle);
	}
	} finally {
	StrictMode.setVmPolicy(oldPolicy);
	}
	} catch (SecurityException e) {
	if (!onErrorStartingShortcut(intent, info)) {
	throw e;
	}
	}
	}

	protected boolean onErrorStartingShortcut(Intent intent, ItemInfo info) {
	return false;
	}

	@Override
	protected void onStart() {
	super.onStart();

	if (mOnStartCallback != null) {
	mOnStartCallback.onActivityStart(this);
	mOnStartCallback = null;
	}
	}

	@Override
	protected void onDestroy() {
	super.onDestroy();
	WallpaperColorInfo.getInstance(this).removeOnChangeListener(this);
	mRotationListener.disable();
	}

	public <T extends BaseDraggingActivity> void setOnStartCallback(OnStartCallback<T> callback) {
	mOnStartCallback = callback;
	}

	protected void onDeviceProfileInitiated() {
	if (mDeviceProfile.isVerticalBarLayout()) {
	mRotationListener.enable();
	mDeviceProfile.updateIsSeascape(getWindowManager());
	} else {
	mRotationListener.disable();
	}
	}

	private void onDeviceRotationChanged() {
	if (mDeviceProfile.updateIsSeascape(getWindowManager())) {
	reapplyUi();
	}
	}

	protected abstract void reapplyUi();

	/**
	* Callback for listening for onStart
	*/
	public interface OnStartCallback<T extends BaseDraggingActivity> {

	void onActivityStart(T activity);
	}
	}