1 /*
2 * Copyright (C) 2019 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
17 #ifndef _UI_INPUTREADER_TOUCH_CURSOR_INPUT_MAPPER_COMMON_H
18 #define _UI_INPUTREADER_TOUCH_CURSOR_INPUT_MAPPER_COMMON_H
19
20 #include <InputFlingerProperties.sysprop.h>
21 #include <input/DisplayViewport.h>
22 #include <stdint.h>
23
24 #include "EventHub.h"
25 #include "InputListener.h"
26 #include "InputReaderContext.h"
27
28 namespace android {
29
30 // --- Static Definitions ---
31
32 // When per-window input rotation is enabled, display transformations such as rotation and
33 // projection are part of the input window's transform. This means InputReader should work in the
34 // un-rotated coordinate space.
isPerWindowInputRotationEnabled()35 static bool isPerWindowInputRotationEnabled() {
36 return sysprop::InputFlingerProperties::per_window_input_rotation().value_or(false);
37 }
38
getInverseRotation(int32_t orientation)39 static int32_t getInverseRotation(int32_t orientation) {
40 switch (orientation) {
41 case DISPLAY_ORIENTATION_90:
42 return DISPLAY_ORIENTATION_270;
43 case DISPLAY_ORIENTATION_270:
44 return DISPLAY_ORIENTATION_90;
45 default:
46 return orientation;
47 }
48 }
49
rotateDelta(int32_t orientation,float * deltaX,float * deltaY)50 static void rotateDelta(int32_t orientation, float* deltaX, float* deltaY) {
51 float temp;
52 switch (orientation) {
53 case DISPLAY_ORIENTATION_90:
54 temp = *deltaX;
55 *deltaX = *deltaY;
56 *deltaY = -temp;
57 break;
58
59 case DISPLAY_ORIENTATION_180:
60 *deltaX = -*deltaX;
61 *deltaY = -*deltaY;
62 break;
63
64 case DISPLAY_ORIENTATION_270:
65 temp = *deltaX;
66 *deltaX = -*deltaY;
67 *deltaY = temp;
68 break;
69
70 default:
71 break;
72 }
73 }
74
75 // Rotates the given point (x, y) by the supplied orientation. The width and height are the
76 // dimensions of the surface prior to this rotation being applied.
rotatePoint(int32_t orientation,float & x,float & y,int32_t width,int32_t height)77 static void rotatePoint(int32_t orientation, float& x, float& y, int32_t width, int32_t height) {
78 rotateDelta(orientation, &x, &y);
79 switch (orientation) {
80 case DISPLAY_ORIENTATION_90:
81 y += width;
82 break;
83 case DISPLAY_ORIENTATION_180:
84 x += width;
85 y += height;
86 break;
87 case DISPLAY_ORIENTATION_270:
88 x += height;
89 break;
90 default:
91 break;
92 }
93 }
94
95 // Returns true if the pointer should be reported as being down given the specified
96 // button states. This determines whether the event is reported as a touch event.
isPointerDown(int32_t buttonState)97 static bool isPointerDown(int32_t buttonState) {
98 return buttonState &
99 (AMOTION_EVENT_BUTTON_PRIMARY | AMOTION_EVENT_BUTTON_SECONDARY |
100 AMOTION_EVENT_BUTTON_TERTIARY);
101 }
102
synthesizeButtonKey(InputReaderContext * context,int32_t action,nsecs_t when,nsecs_t readTime,int32_t deviceId,uint32_t source,int32_t displayId,uint32_t policyFlags,int32_t lastButtonState,int32_t currentButtonState,int32_t buttonState,int32_t keyCode)103 static void synthesizeButtonKey(InputReaderContext* context, int32_t action, nsecs_t when,
104 nsecs_t readTime, int32_t deviceId, uint32_t source,
105 int32_t displayId, uint32_t policyFlags, int32_t lastButtonState,
106 int32_t currentButtonState, int32_t buttonState, int32_t keyCode) {
107 if ((action == AKEY_EVENT_ACTION_DOWN && !(lastButtonState & buttonState) &&
108 (currentButtonState & buttonState)) ||
109 (action == AKEY_EVENT_ACTION_UP && (lastButtonState & buttonState) &&
110 !(currentButtonState & buttonState))) {
111 NotifyKeyArgs args(context->getNextId(), when, readTime, deviceId, source, displayId,
112 policyFlags, action, 0, keyCode, 0, context->getGlobalMetaState(), when);
113 context->getListener()->notifyKey(&args);
114 }
115 }
116
synthesizeButtonKeys(InputReaderContext * context,int32_t action,nsecs_t when,nsecs_t readTime,int32_t deviceId,uint32_t source,int32_t displayId,uint32_t policyFlags,int32_t lastButtonState,int32_t currentButtonState)117 static void synthesizeButtonKeys(InputReaderContext* context, int32_t action, nsecs_t when,
118 nsecs_t readTime, int32_t deviceId, uint32_t source,
119 int32_t displayId, uint32_t policyFlags, int32_t lastButtonState,
120 int32_t currentButtonState) {
121 synthesizeButtonKey(context, action, when, readTime, deviceId, source, displayId, policyFlags,
122 lastButtonState, currentButtonState, AMOTION_EVENT_BUTTON_BACK,
123 AKEYCODE_BACK);
124 synthesizeButtonKey(context, action, when, readTime, deviceId, source, displayId, policyFlags,
125 lastButtonState, currentButtonState, AMOTION_EVENT_BUTTON_FORWARD,
126 AKEYCODE_FORWARD);
127 }
128
129 } // namespace android
130
131 #endif // _UI_INPUTREADER_TOUCH_CURSOR_INPUT_MAPPER_COMMON_H
132