125 lines
4.9 KiB
Kotlin
125 lines
4.9 KiB
Kotlin
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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package org.mozilla.fenix.library.bookmarks
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import android.graphics.Canvas
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import android.graphics.Rect
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import android.graphics.drawable.Drawable
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import androidx.appcompat.content.res.AppCompatResources
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import androidx.recyclerview.widget.ItemTouchHelper
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import androidx.recyclerview.widget.RecyclerView
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import mozilla.components.support.ktx.android.content.getColorFromAttr
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import mozilla.components.support.ktx.android.content.getDrawableWithTint
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import mozilla.components.support.ktx.android.util.dpToPx
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import org.mozilla.fenix.R
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import org.mozilla.fenix.home.sessioncontrol.SwipeToDeleteCallback
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import org.mozilla.fenix.library.bookmarks.viewholders.BookmarkNodeViewHolder
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import org.mozilla.fenix.library.bookmarks.viewholders.BookmarkSeparatorViewHolder
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class BookmarkTouchHelper(interactor: BookmarkViewInteractor) :
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ItemTouchHelper(BookmarkTouchCallback(interactor))
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class BookmarkTouchCallback(private val interactor: BookmarkViewInteractor) :
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ItemTouchHelper.SimpleCallback(0, ItemTouchHelper.LEFT or ItemTouchHelper.RIGHT) {
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override fun getSwipeDirs(
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recyclerView: RecyclerView,
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viewHolder: RecyclerView.ViewHolder
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): Int {
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val item = (viewHolder as BookmarkNodeViewHolder).item
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return if (viewHolder is BookmarkSeparatorViewHolder || item?.inRoots() == true) {
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0
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} else {
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super.getSwipeDirs(recyclerView, viewHolder)
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}
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}
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/**
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* Delete the bookmark when swiped.
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*/
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override fun onSwiped(viewHolder: RecyclerView.ViewHolder, direction: Int) {
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val item = (viewHolder as BookmarkNodeViewHolder).item
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item?.let { interactor.onDelete(setOf(it)) }
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}
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override fun onChildDraw(
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c: Canvas,
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recyclerView: RecyclerView,
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viewHolder: RecyclerView.ViewHolder,
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dX: Float,
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dY: Float,
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actionState: Int,
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isCurrentlyActive: Boolean
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) {
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super.onChildDraw(c, recyclerView, viewHolder, dX, dY, actionState, isCurrentlyActive)
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val icon = recyclerView.context.getDrawableWithTint(
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R.drawable.ic_delete,
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recyclerView.context.getColorFromAttr(R.attr.destructive)
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)!!
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val background = AppCompatResources.getDrawable(
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recyclerView.context,
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R.drawable.swipe_delete_background
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)!!
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val margin =
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SwipeToDeleteCallback.MARGIN.dpToPx(recyclerView.context.resources.displayMetrics)
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val cellHeight = viewHolder.itemView.bottom - viewHolder.itemView.top
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val iconTop = viewHolder.itemView.top + (cellHeight - icon.intrinsicHeight) / 2
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val iconBottom = iconTop + icon.intrinsicHeight
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when {
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dX > 0 -> { // Swiping to the right
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val backgroundBounds = Rect(
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viewHolder.itemView.left, viewHolder.itemView.top,
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(viewHolder.itemView.left + dX).toInt() + SwipeToDeleteCallback.BACKGROUND_CORNER_OFFSET,
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viewHolder.itemView.bottom
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)
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val iconLeft = viewHolder.itemView.left + margin
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val iconRight = viewHolder.itemView.left + margin + icon.intrinsicWidth
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val iconBounds = Rect(iconLeft, iconTop, iconRight, iconBottom)
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setBounds(background, backgroundBounds, icon, iconBounds)
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draw(background, icon, c)
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}
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dX < 0 -> { // Swiping to the left
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val backgroundBounds = Rect(
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(viewHolder.itemView.right + dX).toInt() - SwipeToDeleteCallback.BACKGROUND_CORNER_OFFSET,
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viewHolder.itemView.top, viewHolder.itemView.right, viewHolder.itemView.bottom
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)
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val iconLeft = viewHolder.itemView.right - margin - icon.intrinsicWidth
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val iconRight = viewHolder.itemView.right - margin
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val iconBounds = Rect(iconLeft, iconTop, iconRight, iconBottom)
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setBounds(background, backgroundBounds, icon, iconBounds)
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draw(background, icon, c)
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}
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else -> { // View not swiped
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val bounds = Rect(0, 0, 0, 0)
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setBounds(background, bounds, icon, bounds)
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}
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}
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}
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override fun onMove(
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recyclerView: RecyclerView,
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viewHolder: RecyclerView.ViewHolder,
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target: RecyclerView.ViewHolder
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): Boolean = false
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private fun setBounds(
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background: Drawable,
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backgroundBounds: Rect,
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icon: Drawable,
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iconBounds: Rect
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) {
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background.bounds = backgroundBounds
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icon.bounds = iconBounds
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}
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private fun draw(background: Drawable, icon: Drawable, c: Canvas) {
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background.draw(c)
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icon.draw(c)
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}
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}
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