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/*
* Copyright (C) 2019 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.
*/
#ifndef _UI_INPUTREADER_TOUCH_CURSOR_INPUT_MAPPER_COMMON_H
#define _UI_INPUTREADER_TOUCH_CURSOR_INPUT_MAPPER_COMMON_H
#include <android-base/properties.h>
#include <input/DisplayViewport.h>
#include <stdint.h>
#include "EventHub.h"
#include "InputListener.h"
#include "InputReaderContext.h"
namespace android {
// --- Static Definitions ---
// When per-window input rotation is enabled, display transformations such as rotation and
// projection are part of the input window's transform. This means InputReader should work in the
// un-rotated coordinate space.
static bool isPerWindowInputRotationEnabled() {
static const bool PER_WINDOW_INPUT_ROTATION =
base::GetBoolProperty("persist.debug.per_window_input_rotation", false);
return PER_WINDOW_INPUT_ROTATION;
}
static int32_t getInverseRotation(int32_t orientation) {
switch (orientation) {
case DISPLAY_ORIENTATION_90:
return DISPLAY_ORIENTATION_270;
case DISPLAY_ORIENTATION_270:
return DISPLAY_ORIENTATION_90;
default:
return orientation;
}
}
static void rotateDelta(int32_t orientation, float* deltaX, float* deltaY) {
float temp;
switch (orientation) {
case DISPLAY_ORIENTATION_90:
temp = *deltaX;
*deltaX = *deltaY;
*deltaY = -temp;
break;
case DISPLAY_ORIENTATION_180:
*deltaX = -*deltaX;
*deltaY = -*deltaY;
break;
case DISPLAY_ORIENTATION_270:
temp = *deltaX;
*deltaX = -*deltaY;
*deltaY = temp;
break;
default:
break;
}
}
// Rotates the given point (x, y) by the supplied orientation. The width and height are the
// dimensions of the surface prior to this rotation being applied.
static void rotatePoint(int32_t orientation, float& x, float& y, int32_t width, int32_t height) {
rotateDelta(orientation, &x, &y);
switch (orientation) {
case DISPLAY_ORIENTATION_90:
y += width;
break;
case DISPLAY_ORIENTATION_180:
x += width;
y += height;
break;
case DISPLAY_ORIENTATION_270:
x += height;
break;
default:
break;
}
}
// Returns true if the pointer should be reported as being down given the specified
// button states. This determines whether the event is reported as a touch event.
static bool isPointerDown(int32_t buttonState) {
return buttonState &
(AMOTION_EVENT_BUTTON_PRIMARY | AMOTION_EVENT_BUTTON_SECONDARY |
AMOTION_EVENT_BUTTON_TERTIARY);
}
static void 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) {
if ((action == AKEY_EVENT_ACTION_DOWN && !(lastButtonState & buttonState) &&
(currentButtonState & buttonState)) ||
(action == AKEY_EVENT_ACTION_UP && (lastButtonState & buttonState) &&
!(currentButtonState & buttonState))) {
NotifyKeyArgs args(context->getNextId(), when, readTime, deviceId, source, displayId,
policyFlags, action, 0, keyCode, 0, context->getGlobalMetaState(), when);
context->getListener()->notifyKey(&args);
}
}
static void 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) {
synthesizeButtonKey(context, action, when, readTime, deviceId, source, displayId, policyFlags,
lastButtonState, currentButtonState, AMOTION_EVENT_BUTTON_BACK,
AKEYCODE_BACK);
synthesizeButtonKey(context, action, when, readTime, deviceId, source, displayId, policyFlags,
lastButtonState, currentButtonState, AMOTION_EVENT_BUTTON_FORWARD,
AKEYCODE_FORWARD);
}
} // namespace android
#endif // _UI_INPUTREADER_TOUCH_CURSOR_INPUT_MAPPER_COMMON_H
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