services/inputflinger/dispatcher/TouchState.h

/*
 * 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.
 */

#pragma once

#include "Monitor.h"
#include "TouchedWindow.h"

namespace android {

namespace gui {
class WindowInfoHandle;
}

namespace inputdispatcher {

struct TouchState {
    // id of the device that is currently down, others are rejected
    int32_t deviceId = -1;
    // source of the device that is current down, others are rejected
    uint32_t source = 0;
    // id to the display that currently has a touch, others are rejected
    int32_t displayId = ADISPLAY_ID_NONE;

    std::vector<TouchedWindow> windows;

    TouchState() = default;
    ~TouchState() = default;
    TouchState& operator=(const TouchState&) = default;

    void reset();
    void addOrUpdateWindow(const sp<android::gui::WindowInfoHandle>& windowHandle,
                           int32_t targetFlags, BitSet32 pointerIds,
                           std::optional<nsecs_t> eventTime = std::nullopt);
    void removeWindowByToken(const sp<IBinder>& token);
    void filterNonAsIsTouchWindows();

    // Cancel pointers for current set of windows except the window with particular binder token.
    void cancelPointersForWindowsExcept(const BitSet32 pointerIds, const sp<IBinder>& token);
    // Cancel pointers for current set of non-pilfering windows i.e. windows with isPilferingWindow
    // set to false.
    void cancelPointersForNonPilferingWindows(const BitSet32 pointerIds);

    sp<android::gui::WindowInfoHandle> getFirstForegroundWindowHandle() const;
    bool isSlippery() const;
    sp<android::gui::WindowInfoHandle> getWallpaperWindow() const;
    // Whether any of the windows are currently being touched
    bool isDown() const;
};

} // namespace inputdispatcher
} // namespace android