87 lines
3.4 KiB
Kotlin
87 lines
3.4 KiB
Kotlin
/*
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* Copyright (C) Eltex ltd 2019 <eltex@eltex-co.ru>
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* FocusAwareDrawerLayout.java is part of NewPipe.
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*
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* NewPipe 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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* NewPipe 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 NewPipe. If not, see <http://www.gnu.org/licenses/>.
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*/
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package org.schabi.newpipe.views
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import android.annotation.SuppressLint
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import android.content.Context
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import android.graphics.Rect
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import android.util.AttributeSet
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import android.view.View
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import androidx.drawerlayout.widget.DrawerLayout
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class FocusAwareDrawerLayout : DrawerLayout {
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constructor(context: Context) : super(context)
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constructor(context: Context,
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attrs: AttributeSet?) : super(context, attrs)
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constructor(context: Context,
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attrs: AttributeSet?,
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defStyle: Int) : super(context, attrs, defStyle)
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override fun onRequestFocusInDescendants(direction: Int,
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previouslyFocusedRect: Rect): Boolean {
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// SDK implementation of this method picks whatever visible View takes the focus first
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// without regard to addFocusables. If the open drawer is temporarily empty, the focus
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// escapes outside of it, which can be confusing
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var hasOpenPanels: Boolean = false
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for (i in 0 until getChildCount()) {
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val child: View = getChildAt(i)
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val lp: LayoutParams = child.getLayoutParams() as LayoutParams
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if (lp.gravity != 0 && isDrawerVisible(child)) {
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hasOpenPanels = true
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if (child.requestFocus(direction, previouslyFocusedRect)) {
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return true
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}
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}
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}
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if (hasOpenPanels) {
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return false
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}
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return super.onRequestFocusInDescendants(direction, previouslyFocusedRect)
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}
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public override fun addFocusables(views: ArrayList<View>, direction: Int,
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focusableMode: Int) {
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var hasOpenPanels: Boolean = false
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var content: View? = null
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for (i in 0 until getChildCount()) {
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val child: View = getChildAt(i)
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val lp: LayoutParams = child.getLayoutParams() as LayoutParams
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if (lp.gravity == 0) {
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content = child
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} else {
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if (isDrawerVisible(child)) {
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hasOpenPanels = true
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child.addFocusables(views, direction, focusableMode)
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}
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}
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}
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if (content != null && !hasOpenPanels) {
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content.addFocusables(views, direction, focusableMode)
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}
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}
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// this override isn't strictly necessary, but it is helpful when DrawerLayout isn't
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// the topmost view in hierarchy (such as when system or builtin appcompat ActionBar is used)
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@SuppressLint("RtlHardcoded")
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public override fun openDrawer(drawerView: View, animate: Boolean) {
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super.openDrawer(drawerView, animate)
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drawerView.requestFocus(FOCUS_FORWARD)
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}
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}
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