147 lines
4.4 KiB
Kotlin
147 lines
4.4 KiB
Kotlin
/*
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* Copyright 2016 JetBrains s.r.o.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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@file:Suppress("unused")
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package org.jetbrains.anko
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import android.app.Activity
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import android.content.Context
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import android.content.ContextWrapper
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import android.view.View
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import android.view.ViewGroup
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import android.view.ViewManager
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import androidx.fragment.app.Fragment
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import org.jetbrains.anko.internals.AnkoInternals.createAnkoContext
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@DslMarker
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private annotation class AnkoContextDslMarker
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@AnkoContextDslMarker
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interface AnkoContext<out T> : ViewManager {
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val ctx: Context
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val owner: T
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val view: View
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override fun updateViewLayout(view: View, params: ViewGroup.LayoutParams) {
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throw UnsupportedOperationException()
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}
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override fun removeView(view: View) {
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throw UnsupportedOperationException()
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}
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companion object {
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fun create(ctx: Context, setContentView: Boolean = false): AnkoContext<Context> =
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AnkoContextImpl(ctx, ctx, setContentView)
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fun createReusable(ctx: Context, setContentView: Boolean = false): AnkoContext<Context> =
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ReusableAnkoContext(ctx, ctx, setContentView)
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fun <T> create(ctx: Context, owner: T, setContentView: Boolean = false): AnkoContext<T> =
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AnkoContextImpl(ctx, owner, setContentView)
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fun <T> createReusable(
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ctx: Context,
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owner: T,
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setContentView: Boolean = false,
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): AnkoContext<T> = ReusableAnkoContext(ctx, owner, setContentView)
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fun <T : ViewGroup> createDelegate(owner: T): AnkoContext<T> = DelegatingAnkoContext(owner)
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}
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}
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internal class DelegatingAnkoContext<T : ViewGroup>(override val owner: T) : AnkoContext<T> {
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override val ctx: Context = owner.context
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override val view: View = owner
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override fun addView(view: View?, params: ViewGroup.LayoutParams?) {
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if (view == null) return
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if (params == null) {
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owner.addView(view)
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} else {
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owner.addView(view, params)
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}
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}
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}
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internal class ReusableAnkoContext<T>(
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override val ctx: Context,
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override val owner: T,
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setContentView: Boolean,
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) : AnkoContextImpl<T>(ctx, owner, setContentView) {
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override fun alreadyHasView() {}
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}
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open class AnkoContextImpl<T>(
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override val ctx: Context,
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override val owner: T,
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private val setContentView: Boolean,
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) : AnkoContext<T> {
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private var myView: View? = null
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override val view: View
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get() = myView ?: throw IllegalStateException("View was not set previously")
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override fun addView(view: View?, params: ViewGroup.LayoutParams?) {
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if (view == null) return
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if (myView != null) {
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alreadyHasView()
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}
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this.myView = view
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if (setContentView) {
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doAddView(ctx, view)
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}
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}
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private fun doAddView(context: Context, view: View) {
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when (context) {
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is Activity -> context.setContentView(view)
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is ContextWrapper -> doAddView(context.baseContext, view)
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else -> throw IllegalStateException("Context is not an Activity, can't set content view")
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}
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}
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protected open fun alreadyHasView(): Unit =
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throw IllegalStateException("View is already set: $myView")
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}
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@Suppress("FunctionNaming")
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inline fun Context.UI(
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setContentView: Boolean,
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init: AnkoContext<Context>.() -> Unit,
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): AnkoContext<Context> =
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createAnkoContext(this, init, setContentView)
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@Suppress("FunctionNaming")
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inline fun Context.UI(init: AnkoContext<Context>.() -> Unit): AnkoContext<Context> =
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createAnkoContext(this, init)
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@Suppress("FunctionNaming")
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inline fun Fragment.UI(init: AnkoContext<Fragment>.() -> Unit): AnkoContext<Fragment> =
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createAnkoContext(requireContext(), init)
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interface AnkoComponent<in T> {
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fun createView(ui: AnkoContext<T>): View
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}
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fun <T : Activity> AnkoComponent<T>.setContentView(activity: T): View =
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createView(AnkoContextImpl(activity, activity, true))
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