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      1 /*
      2  * Copyright (C) 2017 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 package com.android.documentsui.selection;
     17 
     18 import android.graphics.Point;
     19 import android.view.KeyEvent;
     20 import android.view.MotionEvent;
     21 
     22 /**
     23  * Utility methods for working with {@link MotionEvent} instances.
     24  */
     25 final class MotionEvents {
     26 
     27     private MotionEvents() {}
     28 
     29     static boolean isMouseEvent(MotionEvent e) {
     30         return e.getToolType(0) == MotionEvent.TOOL_TYPE_MOUSE;
     31     }
     32 
     33     static boolean isTouchEvent(MotionEvent e) {
     34         return e.getToolType(0) == MotionEvent.TOOL_TYPE_FINGER;
     35     }
     36 
     37     static boolean isActionMove(MotionEvent e) {
     38         return e.getActionMasked() == MotionEvent.ACTION_MOVE;
     39     }
     40 
     41     static boolean isActionDown(MotionEvent e) {
     42         return e.getActionMasked() == MotionEvent.ACTION_DOWN;
     43     }
     44 
     45     static boolean isActionUp(MotionEvent e) {
     46         return e.getActionMasked() == MotionEvent.ACTION_UP;
     47     }
     48 
     49     static boolean isActionPointerUp(MotionEvent e) {
     50         return e.getActionMasked() == MotionEvent.ACTION_POINTER_UP;
     51     }
     52 
     53     static boolean isActionPointerDown(MotionEvent e) {
     54         return e.getActionMasked() == MotionEvent.ACTION_POINTER_DOWN;
     55     }
     56 
     57     static boolean isActionCancel(MotionEvent e) {
     58         return e.getActionMasked() == MotionEvent.ACTION_CANCEL;
     59     }
     60 
     61     static Point getOrigin(MotionEvent e) {
     62         return new Point((int) e.getX(), (int) e.getY());
     63     }
     64 
     65     static boolean isPrimaryButtonPressed(MotionEvent e) {
     66         return e.isButtonPressed(MotionEvent.BUTTON_PRIMARY);
     67     }
     68 
     69     public static boolean isSecondaryButtonPressed(MotionEvent e) {
     70         return e.isButtonPressed(MotionEvent.BUTTON_SECONDARY);
     71     }
     72 
     73     public static boolean isTertiaryButtonPressed(MotionEvent e) {
     74         return e.isButtonPressed(MotionEvent.BUTTON_TERTIARY);
     75     }
     76 
     77     static boolean isShiftKeyPressed(MotionEvent e) {
     78         return hasBit(e.getMetaState(), KeyEvent.META_SHIFT_ON);
     79     }
     80 
     81     static boolean isCtrlKeyPressed(MotionEvent e) {
     82         return hasBit(e.getMetaState(), KeyEvent.META_CTRL_ON);
     83     }
     84 
     85     static boolean isAltKeyPressed(MotionEvent e) {
     86         return hasBit(e.getMetaState(), KeyEvent.META_ALT_ON);
     87     }
     88 
     89     public static boolean isTouchpadScroll(MotionEvent e) {
     90         // Touchpad inputs are treated as mouse inputs, and when scrolling, there are no buttons
     91         // returned.
     92         return isMouseEvent(e) && isActionMove(e) && e.getButtonState() == 0;
     93     }
     94 
     95     private static boolean hasBit(int metaState, int bit) {
     96         return (metaState & bit) != 0;
     97     }
     98 }
     99