libraries/flicker/src/com/android/server/wm/flicker/helpers/WindowUtils.kt

/*
 * Copyright (C) 2020 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.
 */

package com.android.server.wm.flicker.helpers

import android.content.Context
import android.graphics.Point
import android.graphics.Rect
import android.view.WindowManager
import androidx.test.platform.app.InstrumentationRegistry
import com.android.server.wm.traces.common.layers.Display
import com.android.server.wm.traces.common.region.Region
import com.android.server.wm.traces.common.service.PlatformConsts

object WindowUtils {
    /** Helper functions to retrieve system window sizes and positions. */
    private val context
        get() = InstrumentationRegistry.getInstrumentation().context

    private val resources
        get() = context.getResources()

    /** Get the display bounds */
    val displayBounds: Rect
        get() {
            val display = Point()
            val wm = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
            wm.defaultDisplay.getRealSize(display)
            return Rect(0, 0, display.x, display.y)
        }

    /** Gets the current display rotation */
    val displayRotation: PlatformConsts.Rotation
        get() {
            val wm = context.getSystemService(Context.WINDOW_SERVICE) as WindowManager
            return PlatformConsts.Rotation.getByValue(wm.defaultDisplay.rotation)
        }

    /**
     * Get the display bounds when the device is at a specific rotation
     *
     * @param requestedRotation Device rotation
     */
    fun getDisplayBounds(requestedRotation: PlatformConsts.Rotation): Region {
        val displayIsRotated = displayRotation.isRotated()
        val requestedDisplayIsRotated = requestedRotation.isRotated()

        // if the current orientation changes with the requested rotation,
        // flip height and width of display bounds.
        return if (displayIsRotated != requestedDisplayIsRotated) {
            Region.from(0, 0, displayBounds.height(), displayBounds.width())
        } else {
            Region.from(0, 0, displayBounds.width(), displayBounds.height())
        }
    }

    /**
     * Gets the expected status bar position for a specific display
     *
     * @param display the main display
     */
    fun getStatusBarPosition(display: Display): Region {
        val resourceName =
            if (!display.transform.getRotation().isRotated()) {
                "status_bar_height_portrait"
            } else {
                "status_bar_height_landscape"
            }
        val resourceId = resources.getIdentifier(resourceName, "dimen", "android")
        val height = resources.getDimensionPixelSize(resourceId)
        return Region.from(0, 0, display.layerStackSpace.width, height)
    }

    /**
     * Gets the expected navigation bar position for a specific display
     *
     * @param display the main display
     */
    fun getNavigationBarPosition(display: Display): Region {
        return getNavigationBarPosition(display, isGesturalNavigationEnabled)
    }

    /**
     * Gets the expected navigation bar position for a specific display
     *
     * @param display the main display
     * @param isGesturalNavigation whether gestural navigation is enabled
     */
    fun getNavigationBarPosition(display: Display, isGesturalNavigation: Boolean): Region {
        val navBarWidth = getDimensionPixelSize("navigation_bar_width")
        val navBarHeight = navigationBarFrameHeight
        val displayHeight = display.layerStackSpace.height
        val displayWidth = display.layerStackSpace.width
        val requestedRotation = display.transform.getRotation()

        return when {
            // nav bar is at the bottom of the screen
            !requestedRotation.isRotated() || isGesturalNavigation ->
                Region.from(0, displayHeight - navBarHeight, displayWidth, displayHeight)
            // nav bar is on the right side
            requestedRotation == PlatformConsts.Rotation.ROTATION_90 ->
                Region.from(displayWidth - navBarWidth, 0, displayWidth, displayHeight)
            // nav bar is on the left side
            requestedRotation == PlatformConsts.Rotation.ROTATION_270 ->
                Region.from(0, 0, navBarWidth, displayHeight)
            else -> error("Unknown rotation $requestedRotation")
        }
    }

    /**
     * Estimate the navigation bar position at a specific rotation
     *
     * @param requestedRotation Device rotation
     */
    fun estimateNavigationBarPosition(requestedRotation: PlatformConsts.Rotation): Region {
        val displayBounds = displayBounds
        val displayWidth: Int
        val displayHeight: Int
        if (!requestedRotation.isRotated()) {
            displayWidth = displayBounds.width()
            displayHeight = displayBounds.height()
        } else {
            // swap display dimensions in landscape or seascape mode
            displayWidth = displayBounds.height()
            displayHeight = displayBounds.width()
        }
        val navBarWidth = getDimensionPixelSize("navigation_bar_width")
        val navBarHeight = navigationBarFrameHeight

        return when {
            // nav bar is at the bottom of the screen
            !requestedRotation.isRotated() || isGesturalNavigationEnabled ->
                Region.from(0, displayHeight - navBarHeight, displayWidth, displayHeight)
            // nav bar is on the right side
            requestedRotation == PlatformConsts.Rotation.ROTATION_90 ->
                Region.from(displayWidth - navBarWidth, 0, displayWidth, displayHeight)
            // nav bar is on the left side
            requestedRotation == PlatformConsts.Rotation.ROTATION_270 ->
                Region.from(0, 0, navBarWidth, displayHeight)
            else -> error("Unknown rotation $requestedRotation")
        }
    }

    /** Checks if the device uses gestural navigation */
    val isGesturalNavigationEnabled: Boolean
        get() {
            val resourceId =
                resources.getIdentifier("config_navBarInteractionMode", "integer", "android")
            return resources.getInteger(resourceId) == 2 /* NAV_BAR_MODE_GESTURAL */
        }

    fun getDimensionPixelSize(resourceName: String): Int {
        val resourceId = resources.getIdentifier(resourceName, "dimen", "android")
        return resources.getDimensionPixelSize(resourceId)
    }

    /** Gets the navigation bar frame height */
    val navigationBarFrameHeight: Int
        get() {
            return getDimensionPixelSize("navigation_bar_frame_height")
        }

    /** Split screen divider inset height */
    val dockedStackDividerInset: Int
        get() {
            val resourceId =
                resources.getIdentifier("docked_stack_divider_insets", "dimen", "android")
            return resources.getDimensionPixelSize(resourceId)
        }
}