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/*
* Copyright (C) 2015 Daniel Schaal <daniel@schaal.email>
*
* This file is part of OCReader.
*
* OCReader is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* OCReader is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with OCReader. If not, see <http://www.gnu.org/licenses/>.
*
*/
package email.schaal.ocreader.view
import android.content.Context
import android.graphics.Canvas
import android.graphics.Rect
import android.graphics.drawable.Drawable
import android.view.View
import androidx.annotation.DimenRes
import androidx.recyclerview.widget.LinearLayoutManager
import androidx.recyclerview.widget.RecyclerView
import androidx.recyclerview.widget.RecyclerView.ItemDecoration
import email.schaal.ocreader.R
class DividerItemDecoration(context: Context, @DimenRes insetRes: Int) : ItemDecoration() {
private val mDivider: Drawable?
private val inset: Int = context.resources.getDimensionPixelSize(insetRes)
private var size = 0
override fun getItemOffsets(outRect: Rect, view: View, parent: RecyclerView,
state: RecyclerView.State) {
super.getItemOffsets(outRect, view, parent, state)
if (mDivider == null || parent.getChildLayoutPosition(view) < 1) {
return
}
outRect.top = size
}
private val dividerRect = Rect(0, 0, 0, 0)
override fun onDraw(c: Canvas, parent: RecyclerView, state: RecyclerView.State) {
if (mDivider == null) return
val layoutManager = parent.layoutManager
check(!(layoutManager !is LinearLayoutManager ||
layoutManager.orientation != RecyclerView.VERTICAL)) { "DividerItemDecoration can only be used with a vertical LinearLayoutManager." }
val childCount = parent.childCount
val paddingLeft = parent.paddingLeft
val paddingLeftInset = paddingLeft + inset
dividerRect.right = parent.width - parent.paddingRight
loop@ for (i in 0 until childCount) {
val child = parent.getChildAt(i)
when (layoutManager.getItemViewType(child)) {
R.id.viewtype_item -> if (i == childCount - 1 || i == childCount - 2 && layoutManager.getItemViewType(parent.getChildAt(i + 1)) != R.id.viewtype_item) dividerRect.left = paddingLeft else dividerRect.left = paddingLeftInset
R.id.viewtype_empty, R.id.viewtype_loadmore -> dividerRect.left = paddingLeft
R.id.viewtype_error -> continue@loop
}
dividerRect.top = child.bottom + (child.layoutParams as RecyclerView.LayoutParams).bottomMargin
dividerRect.bottom = dividerRect.top + size
mDivider.bounds = dividerRect
mDivider.draw(c)
}
}
init {
val a = context
.obtainStyledAttributes(intArrayOf(android.R.attr.listDivider))
mDivider = a.getDrawable(0)
a.recycle()
if (mDivider != null) size = mDivider.intrinsicHeight
}
}
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