46 lines
1.8 KiB
Kotlin
46 lines
1.8 KiB
Kotlin
/*
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* Twidere - Twitter client for Android
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*
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* Copyright (C) 2012-2017 Mariotaku Lee <mariotaku.lee@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.mariotaku.twidere.extension.view
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import androidx.recyclerview.widget.RecyclerView
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import android.view.View
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import androidx.recyclerview.widget.recyclerView
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import kotlin.math.max
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fun RecyclerView.LayoutManager.calculateSpaceItemHeight(child: View, spaceViewType: Int, typeStart: Int): Int {
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val recyclerView = recyclerView ?: return 0
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var heightBeforeSpace = 0
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for (i in 0 until childCount) {
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val childToMeasure = getChildAt(i)
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val typeToMeasure = getItemViewType(childToMeasure!!)
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if (typeToMeasure == spaceViewType) {
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break
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}
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if (typeToMeasure == typeStart || heightBeforeSpace != 0 && child != childToMeasure) {
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heightBeforeSpace += getDecoratedMeasuredHeight(childToMeasure)
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}
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}
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if (heightBeforeSpace != 0) {
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val spaceHeight = recyclerView.measuredHeight - recyclerView.paddingTop -
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recyclerView.paddingBottom - heightBeforeSpace
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return max(0, spaceHeight)
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}
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return -1
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} |