quickstep/src/com/android/launcher3/taskbar/navbutton/PhoneLandscapeNavLayoutter.kt

/*
 * Copyright (C) 2022 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.launcher3.taskbar.navbutton

import android.content.res.Resources
import android.view.Gravity
import android.view.ViewGroup
import android.widget.FrameLayout
import android.widget.LinearLayout
import androidx.core.view.children
import com.android.launcher3.DeviceProfile
import com.android.launcher3.R
import com.android.launcher3.taskbar.TaskbarManager
import com.android.launcher3.util.DimensionUtils

class PhoneLandscapeNavLayoutter(
        resources: Resources,
        navBarContainer: LinearLayout,
        endContextualContainer: ViewGroup,
        startContextualContainer: ViewGroup
) : AbstractNavButtonLayoutter(
        resources,
        navBarContainer,
        endContextualContainer,
        startContextualContainer
) {

    override fun layoutButtons(dp: DeviceProfile, isContextualButtonShowing: Boolean) {
        // TODO(b/230395757): Polish pending, this is just to make it usable
        val navContainerParams = navButtonContainer.layoutParams as FrameLayout.LayoutParams
        val endStartMargins =
                resources.getDimensionPixelSize(R.dimen.taskbar_nav_buttons_size)
        val taskbarDimensions = DimensionUtils.getTaskbarPhoneDimensions(dp, resources,
                TaskbarManager.isPhoneMode(dp))
        navButtonContainer.removeAllViews()
        navButtonContainer.orientation = LinearLayout.VERTICAL

        navContainerParams.apply {
            width = taskbarDimensions.x
            height = ViewGroup.LayoutParams.MATCH_PARENT
            gravity = Gravity.CENTER
            topMargin = endStartMargins
            bottomMargin = endStartMargins
            marginEnd = 0
            marginStart = 0
        }

        // Swap recents and back button
        navButtonContainer.addView(recentsButton)
        navButtonContainer.addView(homeButton)
        navButtonContainer.addView(backButton)

        navButtonContainer.layoutParams = navContainerParams

        // Add the spaces in between the nav buttons
        val spaceInBetween: Int =
                resources.getDimensionPixelSize(R.dimen.taskbar_button_space_inbetween_phone)
        navButtonContainer.children.forEachIndexed { i, navButton ->
            val buttonLayoutParams = navButton.layoutParams as LinearLayout.LayoutParams
            buttonLayoutParams.weight = 1f
            when (i) {
                0 -> {
                    buttonLayoutParams.bottomMargin = spaceInBetween / 2
                }
                navButtonContainer.childCount - 1 -> {
                    buttonLayoutParams.topMargin = spaceInBetween / 2
                }
                else -> {
                    buttonLayoutParams.bottomMargin = spaceInBetween / 2
                    buttonLayoutParams.topMargin = spaceInBetween / 2
                }
            }
        }
    }
}