Added animation to scrolling sideways in library list mode

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryCategoryAdapter.kt

@@ -183,5 +183,6 @@ class LibraryCategoryAdapter(val libraryListener: LibraryListener) :
         fun selectAll(position: Int)
         fun allSelected(position: Int): Boolean
         fun showCategories(position: Int, view: View)
+        fun recyclerIsScrolling(): Boolean
     }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryCategoryView.kt

@@ -399,4 +399,5 @@ class LibraryCategoryView @JvmOverloads constructor(context: Context, attrs: Att
     override fun selectAll(position: Int) { }
     override fun allSelected(position: Int): Boolean = false
     override fun showCategories(position: Int, view: View) { }
+    override fun recyclerIsScrolling() = false
 }

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryHeaderItem.kt

@@ -144,6 +144,7 @@ class LibraryHeaderItem(private val categoryF: (Int) -> Category, val catId: Int
             }
         }
         private fun showCatSortOptions() {
+            if (adapter.libraryListener.recyclerIsScrolling()) return
             val category =
                 (adapter.getItem(adapterPosition) as? LibraryHeaderItem)?.category ?: return
             // Create a PopupMenu, giving it the clicked view for an anchor

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryHolder.kt

@@ -50,4 +50,9 @@ abstract class LibraryHolder(
         super.onItemReleased(position)
         (adapter as? LibraryCategoryAdapter)?.libraryListener?.onItemReleased(position)
     }
+
+    override fun onLongClick(view: View?): Boolean {
+        super.onLongClick(view)
+        return !adapter.libraryListener.recyclerIsScrolling()
+    }
 }

app/src/main/java/eu/kanade/tachiyomi/ui/library/LibraryListController.kt

@@ -1,14 +1,20 @@
 package eu.kanade.tachiyomi.ui.library
 
+import android.animation.Animator
+import android.animation.AnimatorSet
+import android.animation.ValueAnimator
 import android.graphics.Rect
+import android.os.Build
 import android.os.Bundle
 import android.util.TypedValue
 import android.view.Gravity
 import android.view.LayoutInflater
+import android.view.MotionEvent
 import android.view.View
 import android.view.ViewGroup
 import androidx.appcompat.view.ActionMode
 import androidx.appcompat.widget.PopupMenu
+import androidx.coordinatorlayout.widget.CoordinatorLayout
 import androidx.core.math.MathUtils.clamp
 import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.LinearLayoutManager
@@ -26,6 +32,7 @@ import eu.kanade.tachiyomi.data.database.models.LibraryManga
 import eu.kanade.tachiyomi.data.database.models.Manga
 import eu.kanade.tachiyomi.data.library.LibraryUpdateService
 import eu.kanade.tachiyomi.data.preference.getOrDefault
+import eu.kanade.tachiyomi.ui.main.OnTouchEventInterface
 import eu.kanade.tachiyomi.ui.main.SpinnerTitleInterface
 import eu.kanade.tachiyomi.ui.main.SwipeGestureInterface
 import eu.kanade.tachiyomi.util.system.dpToPx
@@ -33,6 +40,7 @@ import eu.kanade.tachiyomi.util.system.launchUI
 import eu.kanade.tachiyomi.util.view.inflate
 import eu.kanade.tachiyomi.util.view.scrollViewWith
 import eu.kanade.tachiyomi.util.view.snack
+import eu.kanade.tachiyomi.util.view.updateLayoutParams
 import eu.kanade.tachiyomi.util.view.updatePaddingRelative
 import kotlinx.android.synthetic.main.filter_bottom_sheet.*
 import kotlinx.android.synthetic.main.library_grid_recycler.*
@@ -40,8 +48,13 @@ import kotlinx.android.synthetic.main.library_list_controller.*
 import kotlinx.android.synthetic.main.main_activity.*
 import kotlinx.android.synthetic.main.spinner_title.view.*
 import kotlinx.coroutines.delay
+import timber.log.Timber
 import java.util.Locale
+import kotlin.math.abs
 import kotlin.math.max
+import kotlin.math.min
+import kotlin.math.roundToInt
+import kotlin.math.sign
 
 class LibraryListController(bundle: Bundle? = null) : LibraryController(bundle),
     FlexibleAdapter.OnItemClickListener,
@@ -49,6 +62,7 @@ class LibraryListController(bundle: Bundle? = null) : LibraryController(bundle),
     FlexibleAdapter.OnItemMoveListener,
     LibraryCategoryAdapter.LibraryListener,
     SpinnerTitleInterface,
+    OnTouchEventInterface,
     SwipeGestureInterface {
 
     private lateinit var adapter: LibraryCategoryAdapter
@@ -66,6 +80,17 @@ class LibraryListController(bundle: Bundle? = null) : LibraryController(bundle),
 
     private var switchingCategories = false
 
+    var startPosX:Float? = null
+    var startPosY:Float? = null
+    var moved = false
+    var lockedRecycler = false
+    var lockedY = false
+    var nextCategory:Int? = null
+    var ogCategory:Int? = null
+    var prevCategory:Int? = null
+    private val swipeDistance = 300f
+    var flinging = false
+
     /**
      * Recycler view of the list of manga.
      */
@@ -73,7 +98,7 @@ class LibraryListController(bundle: Bundle? = null) : LibraryController(bundle),
 
     override fun contentView():View = recycler_layout
 
-   /* override fun getTitle(): String? {
+    override fun getTitle(): String? {
         return if (::customTitleSpinner.isInitialized) customTitleSpinner.category_title.text.toString()
         else super.getTitle()
 //        when {
@@ -81,7 +106,7 @@ class LibraryListController(bundle: Bundle? = null) : LibraryController(bundle),
 //            spinnerAdapter?.array?.size == 1 -> return spinnerAdapter?.array?.firstOrNull()
 //            else -> return super.getTitle()
 //        }
-    }*/
+    }
 
     private var scrollListener = object : RecyclerView.OnScrollListener () {
         override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
@@ -115,6 +140,156 @@ class LibraryListController(bundle: Bundle? = null) : LibraryController(bundle),
         }
     }
 
+    override fun onTouchEvent(event: MotionEvent?) {
+        if (event == null) {
+            resetScrollingValues()
+            resetRecyclerY()
+            return
+        }
+        if (flinging) return
+        val sheetRect = Rect()
+        val recyclerRect = Rect()
+        bottom_sheet.getGlobalVisibleRect(sheetRect)
+        view?.getGlobalVisibleRect(recyclerRect)
+
+        if (sheetRect.contains(event.x.toInt(), event.y.toInt()) ||
+            !recyclerRect.contains(event.x.toInt(), event.y.toInt())) {
+            return
+        }
+        if (startPosX == null) {
+            startPosX = event.rawX
+            startPosY = event.rawY
+            val position =
+                (recycler.layoutManager as LinearLayoutManager).findFirstVisibleItemPosition()
+            val order = when (val item = adapter.getItem(position)) {
+                is LibraryHeaderItem -> item.category.order
+                is LibraryItem -> presenter.categories.find { it.id == item.manga.category }?.order
+                else -> null
+            }
+            if (order != null) {
+                ogCategory = order
+                var newOffsetN = order + 1
+                while (adapter.indexOf(newOffsetN) == -1 && presenter.categories.any { it.order == newOffsetN }) {
+                    newOffsetN += 1
+                }
+                if (adapter.indexOf(newOffsetN) != -1)
+                    nextCategory = newOffsetN
+
+                if (position == 0) prevCategory = null
+                else {
+                    var newOffsetP = order - 1
+                    while (adapter.indexOf(newOffsetP) == -1 && presenter.categories.any { it.order == newOffsetP }) {
+                        newOffsetP -= 1
+                    }
+                    if (adapter.indexOf(newOffsetP) != -1)
+                        prevCategory = newOffsetP
+                }
+            }
+        }
+        else if (event.actionMasked != MotionEvent.ACTION_UP && startPosX != null) {
+            val distance = abs(event.rawX - startPosX!!)
+            val sign = sign(event.rawX - startPosX!!)
+
+            if (lockedY) return
+
+            if (distance > 60 && abs(event.rawY - startPosY!!) <= 30 &&
+                !lockedRecycler) {
+                lockedRecycler = true
+                switchingCategories = true
+                if ((prevCategory == null  && sign > 0) || (nextCategory == null && sign < 0)) {
+                    recycler_layout.x = 0f
+                    recycler_layout.alpha = 1f
+                    return
+                }
+                else
+                    recycler.suppressLayout(true)
+            }
+            else if (!lockedRecycler && abs(event.rawY - startPosY!!) > 30) {
+                lockedY = true
+                resetRecyclerY()
+                return
+            }
+            if ((prevCategory == null && sign > 0) || (nextCategory == null && sign < 0)) {
+                resetRecyclerY()
+                return
+            }
+            if (abs(event.rawY - startPosY!!) <= 30 || recycler.isLayoutSuppressed
+                || lockedRecycler) {
+                if (distance <= swipeDistance * 1.1f) {
+                    recycler_layout.x = (max(0f, distance - 50f) * sign) / 3
+                    recycler_layout.alpha =
+                        (1f - (distance - (swipeDistance * 0.1f)) / swipeDistance)
+                    if (moved) {
+                        scrollToHeader(ogCategory ?: -1)
+                        moved = false
+                    }
+                } else {
+                    if (!moved) {
+                        scrollToHeader((if (sign <= 0) nextCategory else prevCategory) ?: -1)
+                        moved = true
+                    }
+                    recycler_layout.x = ((distance - swipeDistance * 2) * sign) / 3
+                    recycler_layout.alpha = ((distance - swipeDistance * 1.1f) / swipeDistance)
+                    if (sign > 0) {
+                        recycler_layout.x = min(0f, recycler_layout.x)
+                    } else {
+                        recycler_layout.x = max(0f, recycler_layout.x)
+                    }
+                    recycler_layout.alpha = min(1f, recycler_layout.alpha)
+                }
+            }
+        }
+        else if (event.actionMasked == MotionEvent.ACTION_UP) {
+            recycler_layout.post {
+                if (!flinging) {
+                    resetScrollingValues()
+                    resetRecyclerY(true)
+                }
+            }
+        }
+    }
+
+    private fun resetScrollingValues() {
+        startPosX = null
+        startPosY = null
+        nextCategory = null
+        prevCategory = null
+        ogCategory = null
+        lockedY = false
+    }
+
+    private fun resetRecyclerY(animated: Boolean = false, time: Long = 100) {
+        moved = false
+        lockedRecycler = false
+        if (animated) {
+            val set = AnimatorSet()
+            val translationXAnimator = ValueAnimator.ofFloat(recycler_layout.x, 0f)
+            translationXAnimator.duration = time
+            translationXAnimator.addUpdateListener {
+                    animation -> recycler_layout.x = animation.animatedValue as Float
+            }
+
+            val translationAlphaAnimator = ValueAnimator.ofFloat(recycler_layout.alpha, 1f)
+            translationAlphaAnimator.duration = time
+            translationAlphaAnimator.addUpdateListener {
+                    animation -> recycler_layout.alpha = animation.animatedValue as Float
+            }
+            set.playTogether(translationXAnimator, translationAlphaAnimator)
+            set.start()
+
+            launchUI {
+                delay(time)
+                if (!lockedRecycler) switchingCategories = false
+            }
+        }
+        else {
+            recycler_layout.x = 0f
+            recycler_layout.alpha = 1f
+            switchingCategories = false
+        }
+        recycler.suppressLayout(false)
+    }
+
     override fun inflateView(inflater: LayoutInflater, container: ViewGroup): View {
         return inflater.inflate(R.layout.library_list_controller, container, false)
     }
@@ -133,7 +308,7 @@ class LibraryListController(bundle: Bundle? = null) : LibraryController(bundle),
         })
         recycler.setHasFixedSize(true)
         recycler.adapter = adapter
-        adapter.fastScroller = fast_scroller
+        //adapter.fastScroller = fast_scroller
         recycler.addOnScrollListener(scrollListener)
 
         val tv = TypedValue()
@@ -258,14 +433,26 @@ class LibraryListController(bundle: Bundle? = null) : LibraryController(bundle),
         }
     }
 
-    private fun scrollToHeader(pos: Int, fade:Boolean = false) {
+    private fun scrollToHeader(pos: Int) {
         val headerPosition = adapter.indexOf(pos)
         switchingCategories = true
         if (headerPosition > -1) {
-            activity?.appbar?.y = 0f
+            val appbar = activity?.appbar
+            //if (headerPosition == 0)
+                //activity?.appbar?.y = 0f
             recycler.suppressLayout(true)
+            val appbarOffset =
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
+                    if (appbar?.y ?: 0f > -20) 0 else
+                        (appbar?.y?.plus(view?.rootWindowInsets?.systemWindowInsetTop ?: 0)
+                            ?: 0f).roundToInt() + 10.dpToPx
+                }
+                else {
+                    0
+                }
             (recycler.layoutManager as LinearLayoutManager).scrollToPositionWithOffset(
-                headerPosition, if (headerPosition == 0) 0 else (-30).dpToPx
+                headerPosition, (if (headerPosition == 0) 0 else (-28).dpToPx)
+                    + appbarOffset
             )
             recycler.suppressLayout(false)
         }
@@ -349,6 +536,7 @@ class LibraryListController(bundle: Bundle? = null) : LibraryController(bundle),
     }
 
     override fun startReading(position: Int) {
+        if (recyclerIsScrolling()) return
         if (adapter.mode == SelectableAdapter.Mode.MULTI) {
             toggleSelection(position)
             return
@@ -381,7 +569,7 @@ class LibraryListController(bundle: Bundle? = null) : LibraryController(bundle),
      * @return true if the item should be selected, false otherwise.
      */
     override fun onItemClick(view: View?, position: Int): Boolean {
-        if (switchingCategories) return false
+        if (recyclerIsScrolling()) return false
         val item = adapter.getItem(position) as? LibraryItem ?: return false
         return if (adapter.mode == SelectableAdapter.Mode.MULTI) {
             lastClickPosition = position
@@ -399,6 +587,7 @@ class LibraryListController(bundle: Bundle? = null) : LibraryController(bundle),
      * @param position the position of the element clicked.
      */
     override fun onItemLongClick(position: Int) {
+        if (recyclerIsScrolling()) return
         createActionModeIfNeeded()
         when {
             lastClickPosition == -1 -> setSelection(position)
@@ -586,6 +775,7 @@ class LibraryListController(bundle: Bundle? = null) : LibraryController(bundle),
     override fun onSwipeRight(x: Float, y: Float) = goToNextCategory(x, y,1)
 
     private fun goToNextCategory(x: Float, y: Float, offset: Int) {
+        /*
         val sheetRect = Rect()
         val recyclerRect = Rect()
         bottom_sheet.getGlobalVisibleRect(sheetRect)
@@ -594,13 +784,58 @@ class LibraryListController(bundle: Bundle? = null) : LibraryController(bundle),
         if (sheetRect.contains(x.toInt(), y.toInt()) ||
             !recyclerRect.contains(x.toInt(), y.toInt())) {
            return
+        }*/
+        //jumpToCategory(offset)
+
+
+        if (lockedRecycler && abs(x) > 1000f)  {
+            val sign = sign(x).roundToInt()
+            val distance = recycler_layout.alpha
+            val speed = max(3000f / abs(x), 0.75f)
+            Timber.d("Flinged $distance, velo ${abs(x)}, speed $speed")
+            if (sign(recycler_layout.x) == sign(x)) {
+                flinging = true
+                val duration = (distance * 100 * speed).toLong()
+                val set = AnimatorSet()
+                val translationXAnimator = ValueAnimator.ofFloat(recycler_layout.x, sign * 100f)
+                translationXAnimator.duration = duration
+                translationXAnimator.addUpdateListener { animation ->
+                    recycler_layout.x = animation.animatedValue as Float
+                }
+
+                val translationAlphaAnimator = ValueAnimator.ofFloat(recycler_layout.alpha, 0f)
+                translationAlphaAnimator.duration = duration
+                translationAlphaAnimator.addUpdateListener { animation ->
+                    recycler_layout.alpha = animation.animatedValue as Float
+                }
+                set.playTogether(translationXAnimator, translationAlphaAnimator)
+                set.start()
+                set.addListener(object : Animator.AnimatorListener {
+                    override fun onAnimationEnd(animation: Animator?) {
+                        recycler_layout.x = -sign * 100f
+                        recycler_layout.alpha = 0f
+                        scrollToHeader((if (sign <= 0) nextCategory else prevCategory) ?: -1)
+                        resetScrollingValues()
+                        resetRecyclerY(true, (100 * speed).toLong())
+                        flinging = false
+                    }
+
+                    override fun onAnimationCancel(animation: Animator?) {}
+
+                    override fun onAnimationRepeat(animation: Animator?) {}
+
+                    override fun onAnimationStart(animation: Animator?) {}
+                })
+            }
         }
+    }
+
+    private fun jumpToCategory(offset: Int) {
         val position =
             (recycler.layoutManager as LinearLayoutManager).findFirstVisibleItemPosition()
         val order = when (val item = adapter.getItem(position)) {
             is LibraryHeaderItem -> item.category.order
             is LibraryItem -> presenter.categories.find { it.id == item.manga.category }?.order
-                ?.plus(if (offset < 0) 1 else 0)
             else -> null
         }
         if (order != null) {
@@ -608,9 +843,11 @@ class LibraryListController(bundle: Bundle? = null) : LibraryController(bundle),
             while (adapter.indexOf(newOffset) == -1 && presenter.categories.any { it.order == newOffset }) {
                 newOffset += offset
             }
-            scrollToHeader (newOffset, true)
+            scrollToHeader(newOffset)
         }
     }
 
     override fun popUpMenu(): PopupMenu = titlePopupMenu
+
+    override fun recyclerIsScrolling() = switchingCategories || lockedRecycler || lockedY
 }

app/src/main/java/eu/kanade/tachiyomi/ui/main/MainActivity.kt

@@ -11,6 +11,7 @@ import android.graphics.Rect
 import android.graphics.drawable.Drawable
 import android.os.Build
 import android.os.Bundle
+import android.provider.Settings
 import android.view.GestureDetector
 import android.view.MenuItem
 import android.view.MotionEvent
@@ -383,7 +384,7 @@ open class MainActivity : BaseActivity(), DownloadServiceListener {
         return super.startSupportActionMode(callback)
     }
 
-   /* override fun onSupportActionModeFinished(mode: androidx.appcompat.view.ActionMode) {
+    override fun onSupportActionModeFinished(mode: androidx.appcompat.view.ActionMode) {
         if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) launchUI {
             val scale = Settings.Global.getFloat(
                 contentResolver, Settings.Global.ANIMATOR_DURATION_SCALE, 1.0f
@@ -391,10 +392,11 @@ open class MainActivity : BaseActivity(), DownloadServiceListener {
             val duration = resources.getInteger(android.R.integer.config_mediumAnimTime) * scale
             delay(duration.toLong())
             delay(100)
-            window?.statusBarColor = getResourceColor(android.R.attr.statusBarColor)
+            window?.statusBarColor = ColorUtils.setAlphaComponent(getResourceColor(android.R.attr
+                .colorBackground), 175)
         }
         super.onSupportActionModeFinished(mode)
-    }*/
+    }
 
     private fun setExtensionsBadge() {
         val updates = preferences.extensionUpdatesCount().getOrDefault()
@@ -553,6 +555,9 @@ open class MainActivity : BaseActivity(), DownloadServiceListener {
 
     override fun dispatchTouchEvent(ev: MotionEvent?): Boolean {
         gestureDetector.onTouchEvent(ev)
+        val controller = router.backstack.lastOrNull()?.controller()
+        if (controller is OnTouchEventInterface)
+            controller.onTouchEvent(ev)
         if (ev?.action == MotionEvent.ACTION_DOWN) {
             if (snackBar != null && snackBar!!.isShown) {
                 val sRect = Rect()
@@ -687,9 +692,9 @@ open class MainActivity : BaseActivity(), DownloadServiceListener {
                         && abs(diffY) <= Companion.SWIPE_THRESHOLD * 0.75f
                     ) {
                         if (diffX > 0) {
-                            currentGestureDelegate?.onSwipeRight(e1.x,  e1.y)
+                            currentGestureDelegate?.onSwipeRight(velocityX,  e1.y)
                         } else {
-                            currentGestureDelegate?.onSwipeLeft(e1.x,  e1.y)
+                            currentGestureDelegate?.onSwipeLeft(velocityX,  e1.y)
                         }
                         result = true
                     }
@@ -739,6 +744,10 @@ interface BottomNavBarInterface {
 
 interface RootSearchInterface
 
+interface OnTouchEventInterface {
+    fun onTouchEvent(event: MotionEvent?)
+}
+
 interface SpinnerTitleInterface {
     fun popUpMenu(): PopupMenu
 }

app/src/main/java/eu/kanade/tachiyomi/util/view/ViewExtensions.kt

@@ -317,7 +317,7 @@ fun Controller.scrollViewWith(recycler: RecyclerView,
     swipeRefreshLayout: SwipeRefreshLayout? = null,
     f: ((WindowInsets) -> Unit)? = null) {
     var statusBarHeight = -1
-    activity!!.appbar.y = 0f
+    activity?.appbar?.y = 0f
     recycler.doOnApplyWindowInsets { view, insets, _ ->
         val attrsArray = intArrayOf(android.R.attr.actionBarSize)
         val array = view.context.obtainStyledAttributes(attrsArray)
@@ -335,13 +335,13 @@ fun Controller.scrollViewWith(recycler: RecyclerView,
     recycler.addOnScrollListener(object : RecyclerView.OnScrollListener() {
         override fun onScrolled(recyclerView: RecyclerView, dx: Int, dy: Int) {
             super.onScrolled(recyclerView, dx, dy)
-            if (router.backstack.lastOrNull()?.controller() == this@scrollViewWith &&
+            if (router?.backstack?.lastOrNull()?.controller() == this@scrollViewWith &&
                 statusBarHeight > -1 &&
                 activity!!.appbar.height > 0) {
                 activity!!.appbar.y -= dy
                 activity!!.appbar.y = clamp(
                     activity!!.appbar.y,
-                    -activity!!.appbar.height.toFloat(),// + statusBarHeight,
+                    -activity!!.appbar.height.toFloat(),
                     0f
                 )
             }
@@ -350,7 +350,7 @@ fun Controller.scrollViewWith(recycler: RecyclerView,
         override fun onScrollStateChanged(recyclerView: RecyclerView, newState: Int) {
             super.onScrollStateChanged(recyclerView, newState)
             if (newState == RecyclerView.SCROLL_STATE_IDLE) {
-                if (router.backstack.lastOrNull()?.controller() == this@scrollViewWith &&
+                if (router?.backstack?.lastOrNull()?.controller() == this@scrollViewWith &&
                     statusBarHeight > -1 &&
                     activity!!.appbar.height > 0) {
                     val halfWay = abs((-activity!!.appbar.height.toFloat()) / 2)