From 4732a67738aee969d4f2d34fb14013236a75e204 Mon Sep 17 00:00:00 2001
From: Kirill Nayduik <kirill.nayduikkn1@gmail.com>
Date: Fri, 2 Jul 2021 11:31:08 +0300
Subject: [PATCH] Add MviKeyboardResizableFragment

---
 mvi-arch/build.gradle                         |  1 +
 .../roboswag/mvi_arch/core/MviFragment.kt     |  4 +-
 .../core/MviKeyboardResizableFragment.kt      | 91 +++++++++++++++++++
 3 files changed, 94 insertions(+), 2 deletions(-)
 create mode 100644 mvi-arch/src/main/java/ru/touchin/roboswag/mvi_arch/core/MviKeyboardResizableFragment.kt

diff --git a/mvi-arch/build.gradle b/mvi-arch/build.gradle
index 6059357..bfaa0aa 100644
--- a/mvi-arch/build.gradle
+++ b/mvi-arch/build.gradle
@@ -6,6 +6,7 @@ dependencies {
     implementation project(":lifecycle")
     implementation project(":kotlin-extensions")
     implementation project(":logging")
+    implementation project(":utils")
 
     implementation("androidx.core:core-ktx")
     implementation("androidx.appcompat:appcompat")
diff --git a/mvi-arch/src/main/java/ru/touchin/roboswag/mvi_arch/core/MviFragment.kt b/mvi-arch/src/main/java/ru/touchin/roboswag/mvi_arch/core/MviFragment.kt
index 80e7758..37ea868 100644
--- a/mvi-arch/src/main/java/ru/touchin/roboswag/mvi_arch/core/MviFragment.kt
+++ b/mvi-arch/src/main/java/ru/touchin/roboswag/mvi_arch/core/MviFragment.kt
@@ -9,7 +9,6 @@ import androidx.annotation.LayoutRes
 import androidx.annotation.MainThread
 import androidx.core.os.bundleOf
 import androidx.fragment.app.Fragment
-import androidx.fragment.app.FragmentActivity
 import androidx.lifecycle.Observer
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.ViewModelProvider
@@ -18,6 +17,7 @@ import ru.touchin.roboswag.mvi_arch.di.ViewModelAssistedFactory
 import ru.touchin.roboswag.mvi_arch.di.ViewModelFactory
 import ru.touchin.roboswag.mvi_arch.marker.ViewAction
 import ru.touchin.roboswag.mvi_arch.marker.ViewState
+import ru.touchin.roboswag.navigation_base.activities.BaseActivity
 import ru.touchin.roboswag.navigation_base.fragments.BaseFragment
 import ru.touchin.roboswag.navigation_base.fragments.EmptyState
 import javax.inject.Inject
@@ -48,7 +48,7 @@ import javax.inject.Inject
 abstract class MviFragment<NavArgs, State, Action, VM>(
         @LayoutRes layout: Int,
         navArgs: NavArgs = EmptyState as NavArgs
-) : BaseFragment<FragmentActivity>(layout)
+) : BaseFragment<BaseActivity>(layout)
         where NavArgs : Parcelable,
               State : ViewState,
               Action : ViewAction,
diff --git a/mvi-arch/src/main/java/ru/touchin/roboswag/mvi_arch/core/MviKeyboardResizableFragment.kt b/mvi-arch/src/main/java/ru/touchin/roboswag/mvi_arch/core/MviKeyboardResizableFragment.kt
new file mode 100644
index 0000000..4a6c55f
--- /dev/null
+++ b/mvi-arch/src/main/java/ru/touchin/roboswag/mvi_arch/core/MviKeyboardResizableFragment.kt
@@ -0,0 +1,91 @@
+package ru.touchin.roboswag.mvi_arch.core
+
+import android.os.Bundle
+import android.os.Parcelable
+import android.view.View
+import androidx.annotation.LayoutRes
+import androidx.lifecycle.LifecycleObserver
+import ru.touchin.roboswag.components.utils.hideSoftInput
+import ru.touchin.roboswag.mvi_arch.marker.ViewAction
+import ru.touchin.roboswag.mvi_arch.marker.ViewState
+import ru.touchin.roboswag.navigation_base.activities.OnBackPressedListener
+import ru.touchin.roboswag.navigation_base.keyboard_resizeable.KeyboardBehaviorDetector
+
+abstract class MviKeyboardResizableFragment<NavArgs, State, Action, VM>(
+        @LayoutRes layout: Int
+) : MviFragment<NavArgs, State, Action, VM>(layout)
+        where NavArgs : Parcelable,
+              State : ViewState,
+              Action : ViewAction,
+              VM : MviViewModel<NavArgs, Action, State> {
+
+    private var isKeyboardVisible: Boolean = false
+
+    private val keyboardHideListener = OnBackPressedListener {
+        if (isKeyboardVisible) {
+            activity.hideSoftInput()
+            true
+        } else {
+            false
+        }
+    }
+
+    private var isHideKeyboardOnBackEnabled = false
+
+    protected open fun onKeyboardShow(diff: Int = 0) {}
+
+    protected open fun onKeyboardHide() {}
+
+    protected fun hideKeyboardOnBackPressed() {
+        isHideKeyboardOnBackEnabled = true
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        activity.keyboardBehaviorDetector = KeyboardBehaviorDetector(activity)
+
+        view.requestApplyInsets()
+        lifecycle.addObserver(activity.keyboardBehaviorDetector as LifecycleObserver)
+    }
+
+    override fun onResume() {
+        super.onResume()
+        if (isHideKeyboardOnBackEnabled) activity.addOnBackPressedListener(keyboardHideListener)
+    }
+
+    override fun onPause() {
+        super.onPause()
+        notifyKeyboardHidden()
+        if (isHideKeyboardOnBackEnabled) activity.removeOnBackPressedListener(keyboardHideListener)
+    }
+
+    override fun onStart() {
+        super.onStart()
+        activity.keyboardBehaviorDetector?.apply {
+            keyboardHideListener = {
+                if (isKeyboardVisible) {
+                    onKeyboardHide()
+                }
+                isKeyboardVisible = false
+            }
+            keyboardShowListener = { diff ->
+                onKeyboardShow(diff)
+                isKeyboardVisible = true
+            }
+        }
+    }
+
+    override fun onStop() {
+        super.onStop()
+        activity.keyboardBehaviorDetector?.apply {
+            keyboardHideListener = null
+            keyboardShowListener = null
+        }
+    }
+
+    private fun notifyKeyboardHidden() {
+        if (isKeyboardVisible) onKeyboardHide()
+        isKeyboardVisible = false
+    }
+
+}