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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.
*/
// clang-format off
#include "../Macros.h"
// clang-format on
#include "RotaryEncoderInputMapper.h"
#include "CursorScrollAccumulator.h"
namespace android {
RotaryEncoderInputMapper::RotaryEncoderInputMapper(InputDeviceContext& deviceContext)
: InputMapper(deviceContext), mOrientation(DISPLAY_ORIENTATION_0) {
mSource = AINPUT_SOURCE_ROTARY_ENCODER;
}
RotaryEncoderInputMapper::~RotaryEncoderInputMapper() {}
uint32_t RotaryEncoderInputMapper::getSources() {
return mSource;
}
void RotaryEncoderInputMapper::populateDeviceInfo(InputDeviceInfo* info) {
InputMapper::populateDeviceInfo(info);
if (mRotaryEncoderScrollAccumulator.haveRelativeVWheel()) {
float res = 0.0f;
if (!getDeviceContext().getConfiguration().tryGetProperty(String8("device.res"), res)) {
ALOGW("Rotary Encoder device configuration file didn't specify resolution!\n");
}
if (!getDeviceContext().getConfiguration().tryGetProperty(String8("device.scalingFactor"),
mScalingFactor)) {
ALOGW("Rotary Encoder device configuration file didn't specify scaling factor,"
"default to 1.0!\n");
mScalingFactor = 1.0f;
}
info->addMotionRange(AMOTION_EVENT_AXIS_SCROLL, mSource, -1.0f, 1.0f, 0.0f, 0.0f,
res * mScalingFactor);
}
}
void RotaryEncoderInputMapper::dump(std::string& dump) {
dump += INDENT2 "Rotary Encoder Input Mapper:\n";
dump += StringPrintf(INDENT3 "HaveWheel: %s\n",
toString(mRotaryEncoderScrollAccumulator.haveRelativeVWheel()));
}
void RotaryEncoderInputMapper::configure(nsecs_t when, const InputReaderConfiguration* config,
uint32_t changes) {
InputMapper::configure(when, config, changes);
if (!changes) {
mRotaryEncoderScrollAccumulator.configure(getDeviceContext());
}
if (!changes || (changes & InputReaderConfiguration::CHANGE_DISPLAY_INFO)) {
std::optional<DisplayViewport> internalViewport =
config->getDisplayViewportByType(ViewportType::INTERNAL);
if (internalViewport) {
mOrientation = internalViewport->orientation;
} else {
mOrientation = DISPLAY_ORIENTATION_0;
}
}
}
void RotaryEncoderInputMapper::reset(nsecs_t when) {
mRotaryEncoderScrollAccumulator.reset(getDeviceContext());
InputMapper::reset(when);
}
void RotaryEncoderInputMapper::process(const RawEvent* rawEvent) {
mRotaryEncoderScrollAccumulator.process(rawEvent);
if (rawEvent->type == EV_SYN && rawEvent->code == SYN_REPORT) {
sync(rawEvent->when, rawEvent->readTime);
}
}
void RotaryEncoderInputMapper::sync(nsecs_t when, nsecs_t readTime) {
PointerCoords pointerCoords;
pointerCoords.clear();
PointerProperties pointerProperties;
pointerProperties.clear();
pointerProperties.id = 0;
pointerProperties.toolType = AMOTION_EVENT_TOOL_TYPE_UNKNOWN;
float scroll = mRotaryEncoderScrollAccumulator.getRelativeVWheel();
bool scrolled = scroll != 0;
// This is not a pointer, so it's not associated with a display.
int32_t displayId = ADISPLAY_ID_NONE;
// Moving the rotary encoder should wake the device (if specified).
uint32_t policyFlags = 0;
if (scrolled && getDeviceContext().isExternal()) {
policyFlags |= POLICY_FLAG_WAKE;
}
if (mOrientation == DISPLAY_ORIENTATION_180) {
scroll = -scroll;
}
// Send motion event.
if (scrolled) {
int32_t metaState = getContext()->getGlobalMetaState();
pointerCoords.setAxisValue(AMOTION_EVENT_AXIS_SCROLL, scroll * mScalingFactor);
NotifyMotionArgs scrollArgs(getContext()->getNextId(), when, readTime, getDeviceId(),
mSource, displayId, policyFlags, AMOTION_EVENT_ACTION_SCROLL, 0,
0, metaState, /* buttonState */ 0, MotionClassification::NONE,
AMOTION_EVENT_EDGE_FLAG_NONE, 1, &pointerProperties,
&pointerCoords, 0, 0, AMOTION_EVENT_INVALID_CURSOR_POSITION,
AMOTION_EVENT_INVALID_CURSOR_POSITION, 0, /* videoFrames */ {});
getListener()->notifyMotion(&scrollArgs);
}
mRotaryEncoderScrollAccumulator.finishSync();
}
} // namespace android
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