Commit 385853a2 authored by RikkaW's avatar RikkaW Committed by John Wu

Introduce LayoutInflaterFactory

This add the ability touch layout XML instantiates process. And most importantly, we can access AttributeSet, making custom view attribute possible.

Some other changes requires this.
parent fa3ef8a1
...@@ -17,6 +17,7 @@ import androidx.navigation.fragment.NavHostFragment ...@@ -17,6 +17,7 @@ import androidx.navigation.fragment.NavHostFragment
import com.topjohnwu.magisk.BR import com.topjohnwu.magisk.BR
import com.topjohnwu.magisk.core.Config import com.topjohnwu.magisk.core.Config
import com.topjohnwu.magisk.core.base.BaseActivity import com.topjohnwu.magisk.core.base.BaseActivity
import com.topjohnwu.magisk.ui.inflater.LayoutInflaterFactory
import com.topjohnwu.magisk.ui.theme.Theme import com.topjohnwu.magisk.ui.theme.Theme
abstract class BaseUIActivity<VM : BaseViewModel, Binding : ViewDataBinding> : abstract class BaseUIActivity<VM : BaseViewModel, Binding : ViewDataBinding> :
...@@ -44,6 +45,8 @@ abstract class BaseUIActivity<VM : BaseViewModel, Binding : ViewDataBinding> : ...@@ -44,6 +45,8 @@ abstract class BaseUIActivity<VM : BaseViewModel, Binding : ViewDataBinding> :
} }
override fun onCreate(savedInstanceState: Bundle?) { override fun onCreate(savedInstanceState: Bundle?) {
layoutInflater.factory2 = LayoutInflaterFactory(delegate)
setTheme(themeRes) setTheme(themeRes)
super.onCreate(savedInstanceState) super.onCreate(savedInstanceState)
......
package com.topjohnwu.magisk.ui.inflater
import android.content.Context
import android.util.AttributeSet
import android.view.InflateException
import android.view.LayoutInflater
import android.view.View
import androidx.appcompat.app.AppCompatDelegate
import androidx.collection.SimpleArrayMap
import java.lang.reflect.Constructor
open class LayoutInflaterFactory(private val delegate: AppCompatDelegate) : LayoutInflater.Factory2 {
override fun onCreateView(name: String, context: Context, attrs: AttributeSet): View? {
return onCreateView(null, name, context, attrs)
}
override fun onCreateView(parent: View?, name: String, context: Context, attrs: AttributeSet): View? {
val view = delegate.createView(parent, name, context, attrs)
?: LayoutInflaterFactoryDefaultImpl.createViewFromTag(context, name, attrs)
onViewCreated(view, parent, name, context, attrs)
return view
}
open fun onViewCreated(view: View?, parent: View?, name: String, context: Context, attrs: AttributeSet) {
if (view == null) return
}
}
private object LayoutInflaterFactoryDefaultImpl {
private val constructorSignature = arrayOf(
Context::class.java, AttributeSet::class.java)
private val classPrefixList = arrayOf(
"android.widget.",
"android.view.",
"android.webkit."
)
private val constructorMap = SimpleArrayMap<String, Constructor<out View?>>()
fun createViewFromTag(context: Context, name: String, attrs: AttributeSet): View? {
var name = name
if (name == "view") {
name = attrs.getAttributeValue(null, "class")
}
return try {
if (-1 == name.indexOf('.')) {
for (prefix in classPrefixList) {
val view: View? = createViewByPrefix(context, name, attrs, prefix)
if (view != null) {
return view
}
}
null
} else {
createViewByPrefix(context, name, attrs, null)
}
} catch (e: Exception) {
null
}
}
@Throws(ClassNotFoundException::class, InflateException::class)
private fun createViewByPrefix(context: Context, name: String, attrs: AttributeSet, prefix: String?): View? {
var constructor = constructorMap[name]
return try {
if (constructor == null) { // Class not found in the cache, see if it's real, and try to add it
val clazz = Class.forName(
if (prefix != null) prefix + name else name,
false,
context.classLoader).asSubclass(View::class.java)
constructor = clazz.getConstructor(*constructorSignature)
constructorMap.put(name, constructor)
}
constructor!!.isAccessible = true
constructor.newInstance(context, attrs)
} catch (e: Exception) {
null
}
}
}
\ No newline at end of file
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