Merge pull request #214 from TouchInstinct/add_base_bottom_sheet

add base fullscreen bottom sheet dialog

mvi-arch/build.gradle

@@ -7,10 +7,13 @@ dependencies {
     implementation project(":kotlin-extensions")
     implementation project(":logging")
     implementation project(":utils")
+    implementation project(":views")
 
     implementation("androidx.core:core-ktx")
     implementation("androidx.appcompat:appcompat")
 
+    implementation("com.google.android.material:material")
+
     implementation("androidx.fragment:fragment")
     implementation("androidx.fragment:fragment-ktx")
 
@@ -31,6 +34,7 @@ dependencies {
     def lifecycleVersion = "2.2.0"
     def coroutinesVersion = "1.3.7"
     def daggerVersion = "2.27"
+    def materialDesignVersion = "1.2.0-rc01"
 
     constraints {
         implementation("androidx.core:core-ktx") {
@@ -43,6 +47,11 @@ dependencies {
                 require("1.0.2")
             }
         }
+        implementation("com.google.android.material:material") {
+            version {
+                require(materialDesignVersion)
+            }
+        }
         implementation("androidx.fragment:fragment") {
             version {
                 require(fragmentVersion)

mvi-arch/src/main/java/ru/touchin/roboswag/mvi_arch/core/FullscreenBottomSheetDialog.kt

@@ -0,0 +1,111 @@
+package ru.touchin.roboswag.mvi_arch.core
+
+import android.app.Dialog
+import android.content.Context
+import android.content.DialogInterface
+import android.os.Bundle
+import android.os.Parcelable
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.FrameLayout
+import androidx.activity.OnBackPressedCallback
+import androidx.annotation.LayoutRes
+import androidx.annotation.MainThread
+import androidx.core.os.bundleOf
+import androidx.lifecycle.Observer
+import androidx.lifecycle.ViewModel
+import androidx.lifecycle.ViewModelProvider
+import com.google.android.material.bottomsheet.BottomSheetBehavior
+import com.google.android.material.bottomsheet.BottomSheetDialog
+import com.google.android.material.bottomsheet.BottomSheetDialogFragment
+import ru.touchin.mvi_arch.R
+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 javax.inject.Inject
+
+abstract class FullscreenBottomSheetDialog<NavArgs, State, Action, VM>(
+        @LayoutRes private val layoutId: Int
+) : BottomSheetDialogFragment(), IMvi<NavArgs, State, Action, VM>
+        where NavArgs : Parcelable,
+              Action : ViewAction,
+              State : ViewState,
+              VM : MviViewModel<NavArgs, Action, State> {
+
+    @Inject
+    lateinit var viewModelMap: MutableMap<Class<out ViewModel>, ViewModelAssistedFactory<out ViewModel>>
+
+    protected lateinit var state: NavArgs
+
+    protected abstract fun injectDependencies()
+
+    @MainThread
+    protected inline fun <reified ViewModel : VM> viewModel(): Lazy<ViewModel> =
+            lazy {
+                val fragmentArguments = arguments ?: bundleOf()
+
+                ViewModelProvider(
+                        viewModelStore,
+                        ViewModelFactory(viewModelMap, this, fragmentArguments)
+                ).get(ViewModel::class.java)
+            }
+
+    private val onShowListener by lazy {
+        DialogInterface.OnShowListener { dialog ->
+            (dialog as BottomSheetDialog).findViewById<FrameLayout>(com.google.android.material.R.id.design_bottom_sheet)
+                    ?.let { BottomSheetBehavior.from(it) }
+                    ?.apply {
+                        state = BottomSheetBehavior.STATE_EXPANDED
+                        skipCollapsed = true
+                    }
+        }
+    }
+
+    override fun onCreate(savedInstanceState: Bundle?) {
+        super.onCreate(savedInstanceState)
+        setStyle(STYLE_NORMAL, R.style.RoundedCornersBottomSheetDialogTheme)
+        (savedInstanceState ?: arguments)?.getParcelable<NavArgs>(MviFragment.INIT_ARGS_KEY)?.let { savedState ->
+            state = savedState
+        }
+    }
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View =
+            inflater.inflate(layoutId, container, false)
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        viewModel.state.observe(viewLifecycleOwner, Observer(this::renderState))
+    }
+
+    override fun onAttach(context: Context) {
+        super.onAttach(context)
+        injectDependencies()
+    }
+
+    override fun onStart() {
+        super.onStart()
+
+        val bottomSheet = dialog?.findViewById<FrameLayout>(com.google.android.material.R.id.design_bottom_sheet)
+        bottomSheet?.layoutParams?.height = ViewGroup.LayoutParams.MATCH_PARENT
+    }
+
+    override fun addOnBackPressedCallback(action: Action) {
+        requireActivity().onBackPressedDispatcher.addCallback(viewLifecycleOwner, object : OnBackPressedCallback(true) {
+            override fun handleOnBackPressed() {
+                dispatchAction(action)
+            }
+        })
+    }
+
+    override fun setupDialog(dialog: Dialog, style: Int) {
+        dialog.setOnShowListener(onShowListener)
+    }
+
+    override fun onSaveInstanceState(outState: Bundle) {
+        super.onSaveInstanceState(outState)
+        outState.putParcelable(MviFragment.INIT_ARGS_KEY, state)
+    }
+
+}

views/src/main/res/values/styles.xml

@@ -17,4 +17,14 @@
         <item name="android:fontFamily">@font/roboto</item>
     </style>
 
+    <style name="RoundedCornersBottomSheetDialogTheme" parent="Theme.Design.Light.BottomSheetDialog">
+        <item name="bottomSheetStyle">@style/RoundedCornersBottomSheetStyle</item>
+        <item name="android:windowIsFloating">false</item>
+        <item name="android:windowSoftInputMode">adjustResize</item>
+    </style>
+
+    <style name="RoundedCornersBottomSheetStyle" parent="Widget.Design.BottomSheet.Modal">
+        <item name="android:background">@android:color/transparent</item>
+    </style>
+
 </resources>