package com.lzf.easyfloat.anim
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import android.animation.Animator
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import android.animation.ValueAnimator
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import android.graphics.Rect
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import android.view.View
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import android.view.WindowManager
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import com.lzf.easyfloat.enums.SidePattern
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import com.lzf.easyfloat.interfaces.OnFloatAnimator
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import com.lzf.easyfloat.utils.DisplayUtils
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import kotlin.math.min
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/**
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* @author: liuzhenfeng
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* @function: 系统浮窗的默认效果，选择靠近左右侧的一边进行出入
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* @date: 2019-07-22 17:22
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*/
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open class DefaultAnimator : OnFloatAnimator {
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override fun enterAnim(
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view: View,
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params: WindowManager.LayoutParams,
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windowManager: WindowManager,
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sidePattern: SidePattern
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): Animator? = getAnimator(view, params, windowManager, sidePattern, false)
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override fun exitAnim(
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view: View,
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params: WindowManager.LayoutParams,
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windowManager: WindowManager,
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sidePattern: SidePattern
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): Animator? = getAnimator(view, params, windowManager, sidePattern, true)
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private fun getAnimator(
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view: View,
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params: WindowManager.LayoutParams,
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windowManager: WindowManager,
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sidePattern: SidePattern,
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isExit: Boolean
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): Animator {
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val triple = initValue(view, params, windowManager, sidePattern)
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// 退出动画的起始值、终点值，与入场动画相反
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val start = if (isExit) triple.second else triple.first
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val end = if (isExit) triple.first else triple.second
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return ValueAnimator.ofInt(start, end).apply {
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addUpdateListener {
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try {
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val value = it.animatedValue as Int
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if (triple.third) params.x = value else params.y = value
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// 动画执行过程中页面关闭，出现异常
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windowManager.updateViewLayout(view, params)
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} catch (e: Exception) {
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cancel()
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}
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}
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}
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}
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/**
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* 计算边距，起始坐标等
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*/
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private fun initValue(
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view: View,
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params: WindowManager.LayoutParams,
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windowManager: WindowManager,
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sidePattern: SidePattern
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): Triple<Int, Int, Boolean> {
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val parentRect = Rect()
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windowManager.defaultDisplay.getRectSize(parentRect)
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// 浮窗各边到窗口边框的距离
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val leftDistance = params.x
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val rightDistance = parentRect.right - (leftDistance + view.right)
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val topDistance = params.y
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val bottomDistance = parentRect.bottom - (topDistance + view.bottom)
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// 水平、垂直方向的距离最小值
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val minX = min(leftDistance, rightDistance)
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val minY = min(topDistance, bottomDistance)
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val isHorizontal: Boolean
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val endValue: Int
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val startValue: Int = when (sidePattern) {
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SidePattern.LEFT, SidePattern.RESULT_LEFT -> {
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// 从左侧到目标位置，右移
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isHorizontal = true
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endValue = params.x
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-view.right
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}
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SidePattern.RIGHT, SidePattern.RESULT_RIGHT -> {
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// 从右侧到目标位置，左移
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isHorizontal = true
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endValue = params.x
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parentRect.right
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}
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SidePattern.TOP, SidePattern.RESULT_TOP -> {
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// 从顶部到目标位置，下移
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isHorizontal = false
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endValue = params.y
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-view.bottom
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}
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SidePattern.BOTTOM, SidePattern.RESULT_BOTTOM -> {
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// 从底部到目标位置，上移
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isHorizontal = false
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endValue = params.y
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parentRect.bottom + getCompensationHeight(view, params)
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}
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SidePattern.DEFAULT, SidePattern.AUTO_HORIZONTAL, SidePattern.RESULT_HORIZONTAL -> {
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// 水平位移，哪边距离屏幕近，从哪侧移动
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isHorizontal = true
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endValue = params.x
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if (leftDistance < rightDistance) -view.right else parentRect.right
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}
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SidePattern.AUTO_VERTICAL, SidePattern.RESULT_VERTICAL -> {
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// 垂直位移，哪边距离屏幕近，从哪侧移动
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isHorizontal = false
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endValue = params.y
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if (topDistance < bottomDistance) -view.bottom
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else parentRect.bottom + getCompensationHeight(view, params)
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}
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else -> if (minX <= minY) {
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isHorizontal = true
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endValue = params.x
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if (leftDistance < rightDistance) -view.right else parentRect.right
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} else {
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isHorizontal = false
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endValue = params.y
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if (topDistance < bottomDistance) -view.bottom
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else parentRect.bottom + getCompensationHeight(view, params)
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}
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}
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return Triple(startValue, endValue, isHorizontal)
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}
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/**
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* 单页面浮窗（popupWindow），坐标从顶部计算，需要加上状态栏的高度
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*/
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private fun getCompensationHeight(view: View, params: WindowManager.LayoutParams): Int {
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val location = IntArray(2)
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// 获取在整个屏幕内的绝对坐标
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view.getLocationOnScreen(location)
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// 绝对高度和相对高度相等，说明是单页面浮窗（popupWindow），计算底部动画时需要加上状态栏高度
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return if (location[1] == params.y) DisplayUtils.statusBarHeight(view) else 0
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}
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}
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