88 lines
2.8 KiB
Kotlin
88 lines
2.8 KiB
Kotlin
/*
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* Twidere - Twitter client for Android
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*
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* Copyright (C) 2012-2015 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.activity.iface
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import android.os.Handler
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import android.os.Looper
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import androidx.fragment.app.FragmentActivity
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import nl.komponents.kovenant.Promise
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import nl.komponents.kovenant.deferred
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import java.util.*
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/**
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* Created by mariotaku on 15/12/28.
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*/
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interface IBaseActivity<out A : FragmentActivity> {
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fun executeAfterFragmentResumed(useHandler: Boolean = false, action: (A) -> Unit): Promise<Unit, Exception>
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class ActionHelper<A : FragmentActivity> {
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private var fragmentResumed: Boolean = false
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private val actionQueue = LinkedList<ExecuteInfo<A>>()
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private val handler = Handler(Looper.getMainLooper())
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fun dispatchOnPause() {
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fragmentResumed = false
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}
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fun dispatchOnResumeFragments(activity: A) {
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fragmentResumed = true
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executePending(activity)
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}
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private fun executePending(activity: A) {
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if (!fragmentResumed) return
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var info: ExecuteInfo<A>?
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do {
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info = actionQueue.poll()
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info?.let { i ->
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if (i.useHandler) {
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handler.post { i.invoke(activity) }
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} else {
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i.invoke(activity)
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}
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}
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} while (info != null)
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}
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fun executeAfterFragmentResumed(activity: A, useHandler: Boolean = false, action: (A) -> Unit)
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: Promise<Unit, Exception> {
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val info = ExecuteInfo(action, useHandler)
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actionQueue.add(info)
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executePending(activity)
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return info.promise
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}
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private data class ExecuteInfo<in A : FragmentActivity>(private val action: (A) -> Unit, val useHandler: Boolean) {
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private val deferredInstance = deferred<Unit, Exception>()
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val promise: Promise<Unit, Exception> get() = deferredInstance.promise
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fun invoke(activity: A) {
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action(activity)
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deferredInstance.resolve(Unit)
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}
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}
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}
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}
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