67 lines
3.0 KiB
Kotlin
67 lines
3.0 KiB
Kotlin
/* Copyright 2017 Andrew Dawson
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*
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* This file is a part of Tusky.
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*
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* This program is free software; you can redistribute it and/or modify it under the terms of the
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* GNU General Public License as published by the Free Software Foundation; either version 3 of the
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* License, or (at your option) any later version.
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*
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* Tusky is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even
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* the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along with Tusky; if not,
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* see <http://www.gnu.org/licenses>. */
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package com.keylesspalace.tusky.components.viewthread
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import android.content.Context
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import android.graphics.Canvas
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import android.graphics.drawable.Drawable
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import android.view.View
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import androidx.core.content.ContextCompat
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import androidx.core.view.forEach
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import androidx.recyclerview.widget.RecyclerView
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import com.keylesspalace.tusky.R
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class ConversationLineItemDecoration(context: Context) : RecyclerView.ItemDecoration() {
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private val divider: Drawable = ContextCompat.getDrawable(context, R.drawable.conversation_thread_line)!!
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private val avatarTopMargin = context.resources.getDimensionPixelSize(R.dimen.account_avatar_margin)
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private val halfAvatarHeight = context.resources.getDimensionPixelSize(R.dimen.timeline_status_avatar_height) / 2
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private val statusLineMarginStart = context.resources.getDimensionPixelSize(R.dimen.status_line_margin_start)
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override fun onDraw(canvas: Canvas, parent: RecyclerView, state: RecyclerView.State) {
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val dividerStart = parent.paddingStart + statusLineMarginStart
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val dividerEnd = dividerStart + divider.intrinsicWidth
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val items = (parent.adapter as ThreadAdapter).currentList
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parent.forEach { statusItemView ->
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val position = parent.getChildAdapterPosition(statusItemView)
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items.getOrNull(position)?.let { current ->
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val above = items.getOrNull(position - 1)
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val dividerTop = if (above != null && above.id == current.status.inReplyToId) {
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statusItemView.top
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} else {
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statusItemView.top + avatarTopMargin + halfAvatarHeight
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}
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val below = items.getOrNull(position + 1)
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val dividerBottom = if (below != null && current.id == below.status.inReplyToId && !current.isDetailed) {
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statusItemView.bottom
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} else {
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statusItemView.top + avatarTopMargin + halfAvatarHeight
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}
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if (parent.layoutDirection == View.LAYOUT_DIRECTION_LTR) {
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divider.setBounds(dividerStart, dividerTop, dividerEnd, dividerBottom)
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} else {
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divider.setBounds(canvas.width - dividerEnd, dividerTop, canvas.width - dividerStart, dividerBottom)
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}
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divider.draw(canvas)
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}
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}
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}
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}
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