feat: add ability to remove attributes from views

actions/src/main/java/com/itsaky/androidide/actions/actionUtils.kt

@@ -19,32 +19,27 @@ package com.itsaky.androidide.actions
 
 import android.content.Context
 import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import com.itsaky.androidide.utils.DialogUtils
 import io.github.rosemoe.sora.widget.CodeEditor
 import java.io.File
 import java.nio.file.Path
 
-fun ActionItem.requireContext(data: ActionData): Context {
-  return data.get(Context::class.java)
-    ?: throw IllegalArgumentException("No context instance provided")
-}
-
-fun ActionItem.requireFile(data: ActionData): File {
+fun requireFile(data: ActionData): File {
   return data.get(File::class.java) ?: throw IllegalArgumentException("No file instance provided")
 }
 
-fun ActionItem.requirePath(data: ActionData): Path {
+fun requirePath(data: ActionData): Path {
   return requireFile(data).toPath()
 }
 
-fun ActionItem.requireEditor(data: ActionData): CodeEditor {
+fun requireEditor(data: ActionData): CodeEditor {
   return data.get(CodeEditor::class.java)
     ?: throw IllegalArgumentException("An editor instance is required but none was provided")
 }
 
-fun ActionItem.newDialogBuilder(data: ActionData): MaterialAlertDialogBuilder {
-  val klass = Class.forName("com.itsaky.androidide.utils.DialogUtils")
-  val method = klass.getDeclaredMethod("newMaterialDialogBuilder", Context::class.java)
-  return method.invoke(null, data.get(Context::class.java)!!) as MaterialAlertDialogBuilder
+fun newDialogBuilder(data: ActionData): MaterialAlertDialogBuilder {
+  val context = data.get(Context::class.java)!!
+  return DialogUtils.newMaterialDialogBuilder(context)
 }
 
 /**
@@ -54,7 +49,7 @@ fun ActionItem.newDialogBuilder(data: ActionData): MaterialAlertDialogBuilder {
  * @param types The type of objects to look for.
  * @return `true` if the [data] has the given [types], `false` otherwise.
  */
-fun ActionItem.hasRequiredData(data: ActionData, vararg types: Class<*>): Boolean {
+fun hasRequiredData(data: ActionData, vararg types: Class<*>): Boolean {
   for (type in types) {
     data.get(type) ?: return false
   }

common/src/main/java/com/itsaky/androidide/utils/DialogUtils.kt

@@ -14,51 +14,48 @@
  *  You should have received a copy of the GNU General Public License
  *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
  */
+package com.itsaky.androidide.utils
 
-package com.itsaky.androidide.utils;
-
-import android.content.Context;
-import android.content.DialogInterface;
-
-import androidx.annotation.NonNull;
-
-import com.google.android.material.dialog.MaterialAlertDialogBuilder;
-import com.itsaky.androidide.resources.R;
-
-import org.jetbrains.annotations.Contract;
+import android.content.Context
+import android.content.DialogInterface.OnClickListener
+import com.google.android.material.dialog.MaterialAlertDialogBuilder
+import com.itsaky.androidide.resources.R.string
+import com.itsaky.androidide.resources.R.style
+import org.jetbrains.annotations.Contract
 
 /**
  * Utility class for creating dialogs.
  *
  * @author Akash Yadav
  */
-public class DialogUtils {
-
+object DialogUtils {
+  
   /**
    * Create a new alert dialog with two buttons: <span>Yes</span> and <span>No</span>. This method
-   * simply calls {@link #newYesNoDialog(Context, String, String, DialogInterface.OnClickListener,
-   * DialogInterface.OnClickListener)} with default values for title and message.
+   * simply calls [.newYesNoDialog] with default values for title and message.
    *
    * @param context The context for the dialog.
    * @param positiveClickListener A listener that will be invoked on the <span>Yes</span> button
-   *     click.
+   * click.
    * @param negativeClickListener A listener that will be invoked on the <span>No</span> button
-   *     click.
+   * click.
    * @return The newly created dialog.
    */
-  @NonNull
-  public static MaterialAlertDialogBuilder newYesNoDialog(
-      Context context,
-      DialogInterface.OnClickListener positiveClickListener,
-      DialogInterface.OnClickListener negativeClickListener) {
+  @JvmStatic
+  @JvmOverloads
+  fun newYesNoDialog(
+    context: Context,
+    positiveClickListener: OnClickListener? = null,
+    negativeClickListener: OnClickListener? = null
+  ): MaterialAlertDialogBuilder {
     return newYesNoDialog(
-        context,
-        context.getString(R.string.msg_yesno_def_title),
-        context.getString(R.string.msg_yesno_def_message),
-        positiveClickListener,
-        negativeClickListener);
+      context,
+      context.getString(string.msg_yesno_def_title),
+      context.getString(string.msg_yesno_def_message),
+      positiveClickListener,
+      negativeClickListener)
   }
-
+  
   /**
    * Create a new alert dialog with two buttons: <span>Yes</span> and <span>No</span>.
    *
@@ -66,36 +63,37 @@ public class DialogUtils {
    * @param title The title of the dialog.
    * @param message The message of the dialog.
    * @param positiveClickListener A listener that will be invoked on the <span>Yes</span> button
-   *     click.
+   * click.
    * @param negativeClickListener A listener that will be invoked on the <span>No</span> button
-   *     click.
+   * click.
    * @return The newly created dialog instance.
    */
-  @NonNull
-  public static MaterialAlertDialogBuilder newYesNoDialog(
-      Context context,
-      String title,
-      String message,
-      DialogInterface.OnClickListener positiveClickListener,
-      DialogInterface.OnClickListener negativeClickListener) {
-    final var builder = DialogUtils.newMaterialDialogBuilder(context);
-    builder.setTitle(title);
-    builder.setMessage(message);
-    builder.setPositiveButton(R.string.yes, positiveClickListener);
-    builder.setNegativeButton(R.string.no, negativeClickListener);
-
-    return builder;
+  @JvmStatic
+  @JvmOverloads
+  fun newYesNoDialog(
+    context: Context,
+    title: String,
+    message: String? = null,
+    positiveClickListener: OnClickListener? = null,
+    negativeClickListener: OnClickListener? = null
+  ): MaterialAlertDialogBuilder {
+    val builder = newMaterialDialogBuilder(context)
+    builder.setTitle(title)
+    builder.setMessage(message)
+    builder.setPositiveButton(string.yes, positiveClickListener)
+    builder.setNegativeButton(string.no, negativeClickListener)
+    return builder
   }
-
+  
   /**
    * Creates a new MaterialAlertDialogBuilder with the app's default style.
    *
    * @param context The context for the dialog builder.
    * @return The new MaterialAlertDialogBuilder instance.
    */
-  @NonNull
+  @JvmStatic
   @Contract("_ -> new")
-  public static MaterialAlertDialogBuilder newMaterialDialogBuilder(Context context) {
-    return new MaterialAlertDialogBuilder(context, R.style.AppTheme_MaterialAlertDialog);
+  fun newMaterialDialogBuilder(context: Context): MaterialAlertDialogBuilder {
+    return MaterialAlertDialogBuilder(context, style.AppTheme_MaterialAlertDialog)
   }
-}
+}

lsp/java/src/main/java/com/itsaky/androidide/lsp/java/actions/BaseJavaCodeAction.kt

@@ -31,7 +31,6 @@ import com.itsaky.androidide.lsp.java.JavaLanguageServer
 import com.itsaky.androidide.lsp.java.rewrite.Rewrite
 import com.itsaky.androidide.projects.ProjectManager
 import com.itsaky.androidide.utils.DocumentUtils
-import com.itsaky.androidide.utils.ILogger
 import java.io.File
 
 /**

lsp/java/src/main/java/com/itsaky/androidide/lsp/java/actions/common/CommentAction.kt

@@ -20,7 +20,6 @@ import com.itsaky.androidide.actions.ActionData
 import com.itsaky.androidide.actions.requireEditor
 import com.itsaky.androidide.resources.R
 import com.itsaky.androidide.lsp.java.actions.BaseJavaCodeAction
-import com.itsaky.androidide.utils.ILogger
 
 /** @author Akash Yadav */
 class CommentAction : BaseJavaCodeAction() {

lsp/java/src/main/java/com/itsaky/androidide/lsp/java/actions/common/UncommentAction.kt

@@ -20,7 +20,6 @@ import com.itsaky.androidide.actions.ActionData
 import com.itsaky.androidide.actions.requireEditor
 import com.itsaky.androidide.resources.R
 import com.itsaky.androidide.lsp.java.actions.BaseJavaCodeAction
-import com.itsaky.androidide.utils.ILogger
 
 /** @author Akash Yadav */
 class UncommentAction : BaseJavaCodeAction() {

uidesigner/build.gradle

@@ -46,6 +46,7 @@ dependencies {
     
     implementation project(path: ':common')
     implementation project(path: ':logger')
+    implementation project(path: ':lookup')
     implementation project(path: ':lsp:api')
     implementation project(path: ':lsp:xml')
     implementation project(path: ':resources')

uidesigner/src/main/java/com/itsaky/androidide/uidesigner/adapters/ViewAttrListAdapter.kt

@@ -18,7 +18,9 @@
 package com.itsaky.androidide.uidesigner.adapters
 
 import android.annotation.SuppressLint
+import android.content.Context
 import android.view.LayoutInflater
+import android.view.View
 import android.view.ViewGroup
 import androidx.lifecycle.LifecycleOwner
 import androidx.lifecycle.Observer
@@ -26,9 +28,12 @@ import androidx.recyclerview.widget.RecyclerView
 import com.itsaky.androidide.inflater.IAttribute
 import com.itsaky.androidide.inflater.IView
 import com.itsaky.androidide.inflater.IView.SingleAttributeChangeListener
+import com.itsaky.androidide.uidesigner.R
 import com.itsaky.androidide.uidesigner.adapters.ViewAttrListAdapter.VH
 import com.itsaky.androidide.uidesigner.databinding.LayoutViewattrItemBinding
+import com.itsaky.androidide.uidesigner.models.UiAttribute
 import com.itsaky.androidide.uidesigner.viewmodel.WorkspaceViewModel
+import com.itsaky.androidide.utils.DialogUtils
 
 /**
  * A [RecyclerView.Adapter] which shows the list of attributes of the selected view in the UI
@@ -36,11 +41,15 @@ import com.itsaky.androidide.uidesigner.viewmodel.WorkspaceViewModel
  *
  * @author Akash Yadav
  */
-class ViewAttrListAdapter(attributes: List<IAttribute>, private val viewModel: WorkspaceViewModel?, private val onClick: (IAttribute) -> Unit) :
-  RecyclerView.Adapter<VH>() {
-  
-  private val attributes = attributes.sortedBy { it.name }
-  
+class ViewAttrListAdapter(
+  attributes: List<IAttribute>,
+  private val viewModel: WorkspaceViewModel?,
+  private val onDeleteAttr: (IAttribute) -> Boolean,
+  private val onClick: (IAttribute) -> Unit
+) : RecyclerView.Adapter<VH>() {
+
+  private val attributes = attributes.sortedBy { it.name }.toMutableList()
+
   class VH(val binding: LayoutViewattrItemBinding) : RecyclerView.ViewHolder(binding.root)
 
   override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): VH {
@@ -54,28 +63,56 @@ class ViewAttrListAdapter(attributes: List<IAttribute>, private val viewModel: W
   @SuppressLint("SetTextI18n")
   override fun onBindViewHolder(holder: VH, position: Int) {
     val binding = holder.binding
-    val attr = this.attributes[position]
-    
+    val attr = this.attributes[position] as UiAttribute
+
     binding.attrName.text = "${attr.namespace.prefix}:${attr.name}"
     binding.attrValue.text = attr.value
-    
+
+    if (!attr.isRequired) {
+      binding.deleteAttr.visibility = View.VISIBLE
+      binding.deleteAttr.setOnClickListener {
+        confirmDeleteAttr(binding.deleteAttr.context, attr, position)
+      }
+    } else binding.deleteAttr.visibility = View.INVISIBLE
+
     binding.root.setOnClickListener {
       onClick(attr)
       val viewModel = this.viewModel ?: return@setOnClickListener
-      val attrUpdateListener = object : SingleAttributeChangeListener() {
-        override fun onAttributeUpdated(view: IView, attribute: IAttribute, oldValue: String) {
-          binding.attrValue.text = attribute.value
-        }
-      }
-      val viewInfoScreenObserver = object : Observer<Int> {
-        override fun onChanged(t: Int?) {
-          if (t == WorkspaceViewModel.SCREEN_VIEW_INFO) {
-            viewModel._viewInfoScreen.removeObserver(this)
+      val attrUpdateListener =
+        object : SingleAttributeChangeListener() {
+          override fun onAttributeUpdated(view: IView, attribute: IAttribute, oldValue: String) {
+            binding.attrValue.text = attribute.value
           }
         }
-      }
-      viewModel._viewInfoScreen.observe(binding.root.context as LifecycleOwner, viewInfoScreenObserver)
+      val viewInfoScreenObserver =
+        object : Observer<Int> {
+          override fun onChanged(t: Int?) {
+            if (t == WorkspaceViewModel.SCREEN_VIEW_INFO) {
+              viewModel._viewInfoScreen.removeObserver(this)
+            }
+          }
+        }
+      viewModel._viewInfoScreen.observe(
+        binding.root.context as LifecycleOwner,
+        viewInfoScreenObserver
+      )
       viewModel.view?.registerAttributeChangeListener(attrUpdateListener)
     }
   }
+
+  private fun confirmDeleteAttr(context: Context, attribute: UiAttribute, position: Int) {
+    DialogUtils.newYesNoDialog(
+        context = context,
+        title = context.getString(R.string.title_confirm_delete),
+        message = context.getString(R.string.msg_confirm_delete),
+        positiveClickListener = { dialog, _ ->
+          dialog.dismiss()
+          if (onDeleteAttr(attribute)) {
+            this.attributes.removeAt(position)
+            notifyItemRemoved(position)
+          }
+        }
+      )
+      .show()
+  }
 }

uidesigner/src/main/java/com/itsaky/androidide/uidesigner/fragments/DesignerWorkspaceFragment.kt

@@ -27,15 +27,15 @@ import androidx.transition.ChangeBounds
 import androidx.transition.TransitionManager
 import com.blankj.utilcode.util.SizeUtils
 import com.itsaky.androidide.fragments.BaseFragment
-import com.itsaky.androidide.inflater.IInflateEventsListener
-import com.itsaky.androidide.inflater.IInflationEvent
 import com.itsaky.androidide.inflater.ILayoutInflater
 import com.itsaky.androidide.inflater.IView
 import com.itsaky.androidide.inflater.IViewGroup
 import com.itsaky.androidide.inflater.IViewGroup.SingleOnHierarchyChangeListener
-import com.itsaky.androidide.inflater.InflationFinishEvent
-import com.itsaky.androidide.inflater.InflationStartEvent
-import com.itsaky.androidide.inflater.OnInflateViewEvent
+import com.itsaky.androidide.inflater.events.IInflateEventsListener
+import com.itsaky.androidide.inflater.events.IInflationEvent
+import com.itsaky.androidide.inflater.events.InflationFinishEvent
+import com.itsaky.androidide.inflater.events.InflationStartEvent
+import com.itsaky.androidide.inflater.events.OnInflateViewEvent
 import com.itsaky.androidide.inflater.internal.LayoutFile
 import com.itsaky.androidide.inflater.internal.ViewImpl
 import com.itsaky.androidide.inflater.viewGroup
@@ -47,8 +47,8 @@ import com.itsaky.androidide.uidesigner.drag.WidgetTouchListener
 import com.itsaky.androidide.uidesigner.drawable.UiViewLayeredForeground
 import com.itsaky.androidide.uidesigner.fragments.ViewInfoFragment.Companion.TAG
 import com.itsaky.androidide.uidesigner.models.PlaceholderView
-import com.itsaky.androidide.uidesigner.models.UiView
 import com.itsaky.androidide.uidesigner.models.UiViewGroup
+import com.itsaky.androidide.uidesigner.utils.UiLayoutInflater
 import com.itsaky.androidide.uidesigner.utils.bgDesignerView
 import com.itsaky.androidide.uidesigner.utils.layeredForeground
 import com.itsaky.androidide.uidesigner.viewmodel.WorkspaceViewModel
@@ -70,6 +70,7 @@ class DesignerWorkspaceFragment : BaseFragment() {
 
   private var isInflating = false
   private val viewInfo by lazy { ViewInfoSheet() }
+  private val inflater by lazy { UiLayoutInflater() }
   private val workspaceView by lazy {
     UiViewGroup(LayoutFile(File(""), ""), LinearLayout::class.qualifiedName!!, binding!!.workspace)
   }
@@ -152,14 +153,6 @@ class DesignerWorkspaceFragment : BaseFragment() {
           placeholder.file = file
         }
       }
-
-      override fun onInterceptCreateView(view: IView): IView {
-        view as ViewImpl
-        if (view is IViewGroup) {
-          return UiViewGroup(view.file, view.name, view.viewGroup)
-        }
-        return UiView(view.file, view.name, view.view)
-      }
     }
   }
 
@@ -177,8 +170,7 @@ class DesignerWorkspaceFragment : BaseFragment() {
 
     viewModel._workspaceScreen.observe(viewLifecycleOwner) { binding?.flipper?.displayedChild = it }
     viewModel._errText.observe(viewLifecycleOwner) { binding?.errText?.text = it }
-
-    val inflater = ILayoutInflater.newInflater()
+    
     inflater.inflationEventListener = this.inflateListener
     var hasError = false
     val inflated =
@@ -199,6 +191,7 @@ class DesignerWorkspaceFragment : BaseFragment() {
   override fun onDestroyView() {
     super.onDestroyView()
     this.binding = null
+    this.inflater.close()
   }
 
   private fun setupView(view: IView) {

uidesigner/src/main/java/com/itsaky/androidide/uidesigner/fragments/ViewInfoFragment.kt

@@ -24,9 +24,6 @@ import android.view.ViewGroup
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
 import com.google.android.material.bottomsheet.BottomSheetDialogFragment
-import com.itsaky.androidide.inflater.IAttribute
-import com.itsaky.androidide.inflater.IView
-import com.itsaky.androidide.inflater.IView.SingleAttributeChangeListener
 import com.itsaky.androidide.uidesigner.adapters.ViewAttrListAdapter
 import com.itsaky.androidide.uidesigner.databinding.LayoutViewInfoBinding
 import com.itsaky.androidide.uidesigner.databinding.LayoutViewInfoHeaderBinding
@@ -52,7 +49,7 @@ class ViewInfoFragment : Fragment() {
       field = value
       header = LayoutViewInfoHeaderBinding.bind(value.root)
     }
-  
+
   private var header: LayoutViewInfoHeaderBinding? = null
 
   companion object {
@@ -86,7 +83,10 @@ class ViewInfoFragment : Fragment() {
     header.name.text = view.simpleName
     header.desc.text = view.name
     binding.attrList.adapter =
-      ViewAttrListAdapter(view.attributes, viewModel) {
+      ViewAttrListAdapter(attributes = view.attributes, viewModel = viewModel, onDeleteAttr = {
+        view.removeAttribute(it)
+        true
+      }) {
         viewModel.selectedAttr = it
         viewModel.viewInfoScreen = SCREEN_VALUE_EDITOR
       }

uidesigner/src/main/java/com/itsaky/androidide/uidesigner/models/UiAttribute.kt

@@ -0,0 +1,54 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.itsaky.androidide.uidesigner.models
+
+import com.itsaky.androidide.inflater.IAttribute
+import com.itsaky.androidide.inflater.INamespace
+import com.itsaky.androidide.inflater.IView
+import com.itsaky.androidide.inflater.internal.AttributeImpl
+import com.itsaky.androidide.inflater.internal.ViewAdapterIndex
+
+/**
+ * UI Designer specific implementation of [IAttribute].
+ *
+ * @author Akash Yadav
+ */
+internal data class UiAttribute
+@JvmOverloads
+constructor(
+  override val namespace: INamespace = INamespace.ANDROID,
+  override val name: String,
+  override var value: String
+) : AttributeImpl(namespace, name, value) {
+
+  constructor(src: IAttribute) : this(namespace = src.namespace, name = src.name, value = src.value)
+  
+  /**
+   * Whether this attribute is required or not. Required attributes cannot be removed from a view
+   * once applied.
+   */
+  internal var isRequired = false
+
+  companion object {
+    @JvmStatic
+    fun isRequired(view: IView, attribute: IAttribute): Boolean {
+      val adapter = ViewAdapterIndex.getAdapter(view.name) ?: return false
+      return adapter.isRequiredAttribute(attribute)
+    }
+  }
+}

uidesigner/src/main/java/com/itsaky/androidide/uidesigner/utils/UiInflaterComponentFactory.kt

@@ -0,0 +1,55 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.itsaky.androidide.uidesigner.utils
+
+import android.view.View
+import android.view.ViewGroup
+import com.itsaky.androidide.inflater.IAttribute
+import com.itsaky.androidide.inflater.INamespace
+import com.itsaky.androidide.inflater.IView
+import com.itsaky.androidide.inflater.IComponentFactory
+import com.itsaky.androidide.inflater.internal.LayoutFile
+import com.itsaky.androidide.uidesigner.models.UiAttribute
+import com.itsaky.androidide.uidesigner.models.UiView
+import com.itsaky.androidide.uidesigner.models.UiViewGroup
+
+/**
+ * Creates layout inflater components for UI Designer.
+ *
+ * @author Akash Yadav
+ */
+open class UiInflaterComponentFactory : IComponentFactory {
+
+  override fun createView(file: LayoutFile, name: String, view: View): IView {
+    if (view is ViewGroup) {
+      return UiViewGroup(file, name, view)
+    }
+    return UiView(file, name, view)
+  }
+
+  override fun createAttr(
+    view: IView,
+    namespace: INamespace,
+    name: String,
+    value: String
+  ): IAttribute {
+    return UiAttribute(namespace = namespace, name = name, value = value).apply {
+      isRequired = UiAttribute.isRequired(view, this)
+    }
+  }
+}

uidesigner/src/main/java/com/itsaky/androidide/uidesigner/utils/UiLayoutInflater.kt

@@ -0,0 +1,35 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.itsaky.androidide.uidesigner.utils
+
+import com.itsaky.androidide.inflater.ILayoutInflater
+import com.itsaky.androidide.inflater.internal.LayoutInflaterImpl
+import com.itsaky.androidide.lookup.Lookup
+
+/**
+ * Layout inflater implmentation for the UI designer.
+ *
+ * @author Akash Yadav
+ */
+class UiLayoutInflater : LayoutInflaterImpl() {
+
+  init {
+    this.componentFactory = UiInflaterComponentFactory()
+    Lookup.DEFAULT.update(ILayoutInflater.LOOKUP_KEY, this)
+  }
+}

uidesigner/src/main/java/com/itsaky/androidide/uidesigner/utils/ValueCompletionProvider.kt

@@ -65,7 +65,7 @@ internal class ValueCompletionProvider(
           this.start()
         }
 
-    val copy = (attribute as AttributeImpl).copy()
+    val copy = (attribute as AttributeImpl).copyAttr(view = view)
     copy.value = value
     view.updateAttribute(copy)
   }

uidesigner/src/main/java/com/itsaky/androidide/uidesigner/utils/Widgets.kt

@@ -45,6 +45,7 @@ import com.itsaky.androidide.inflater.internal.AttributeImpl
 import com.itsaky.androidide.inflater.internal.LayoutFile
 import com.itsaky.androidide.uidesigner.R.drawable
 import com.itsaky.androidide.uidesigner.R.string
+import com.itsaky.androidide.uidesigner.models.UiAttribute
 import com.itsaky.androidide.uidesigner.models.UiWidget
 import com.itsaky.androidide.uidesigner.models.UiWidgetCategory
 
@@ -167,7 +168,7 @@ internal object Widgets {
             ) {
             override fun createView(context: Context, parent: ViewGroup, layoutFile: LayoutFile): IView {
               return super.createView(context, parent, layoutFile).apply {
-                addAttribute(AttributeImpl(name = "orientation", value = "horizontal"))
+                addAttribute(UiAttribute(name = "orientation", value = "horizontal"))
               }
             }
           }
@@ -181,7 +182,7 @@ internal object Widgets {
             ) {
             override fun createView(context: Context, parent: ViewGroup, layoutFile: LayoutFile): IView {
               return super.createView(context, parent, layoutFile).apply {
-                addAttribute(AttributeImpl(name = "orientation", value = "vertical"))
+                addAttribute(UiAttribute(name = "orientation", value = "vertical"))
               }
             }
           }

uidesigner/src/main/res/layout/layout_viewattr_item.xml

@@ -34,9 +34,9 @@
     android:layout_marginStart="16dp"
     android:layout_marginEnd="16dp"
     android:textAppearance="@style/TextAppearance.Material3.BodyMedium"
-    app:layout_constraintEnd_toEndOf="parent"
+    app:layout_constraintEnd_toStartOf="@id/delete_attr"
     app:layout_constraintStart_toStartOf="parent"
-    app:layout_constraintTop_toTopOf="parent"
+    app:layout_constraintTop_toTopOf="@id/delete_attr"
     tools:text="android:layout_width" />
 
   <com.google.android.material.textview.MaterialTextView
@@ -46,9 +46,24 @@
     android:layout_marginTop="2dp"
     android:textAppearance="@style/TextAppearance.Material3.BodySmall"
     android:textColor="?attr/colorOnSurfaceVariant"
+    app:layout_constraintBottom_toBottomOf="@id/delete_attr"
     app:layout_constraintEnd_toEndOf="@id/attr_name"
     app:layout_constraintStart_toStartOf="@id/attr_name"
     app:layout_constraintTop_toBottomOf="@id/attr_name"
     tools:text="match_parent" />
 
+  <com.google.android.material.button.MaterialButton
+    android:id="@+id/delete_attr"
+    style="@style/Widget.Material3.Button.IconButton"
+    android:layout_width="48dp"
+    android:layout_height="48dp"
+    android:layout_marginStart="8dp"
+    android:layout_marginEnd="16dp"
+    android:background="?attr/selectableItemBackgroundBorderless"
+    android:contentDescription="@string/title_viewaction_delete"
+    app:icon="@drawable/ic_delete"
+    app:layout_constraintBottom_toBottomOf="parent"
+    app:layout_constraintEnd_toEndOf="parent"
+    app:layout_constraintTop_toTopOf="parent" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>

xml-inflater/src/main/java/com/itsaky/androidide/inflater/DefaultComponentFactory.kt

@@ -0,0 +1,44 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.itsaky.androidide.inflater
+
+import android.view.View
+import android.view.ViewGroup
+import com.itsaky.androidide.inflater.internal.AttributeImpl
+import com.itsaky.androidide.inflater.internal.LayoutFile
+import com.itsaky.androidide.inflater.internal.ViewGroupImpl
+import com.itsaky.androidide.inflater.internal.ViewImpl
+
+/** Default implementation of [IComponentFactory]. */
+open class DefaultComponentFactory : IComponentFactory {
+
+  override fun createView(file: LayoutFile, name: String, view: View): IView {
+    return if (view is ViewGroup) {
+      ViewGroupImpl(file, name, view)
+    } else ViewImpl(file, name, view)
+  }
+
+  override fun createAttr(
+    view: IView,
+    namespace: INamespace,
+    name: String,
+    value: String
+  ): IAttribute {
+    return AttributeImpl(namespace = namespace, name = name, value = value)
+  }
+}

xml-inflater/src/main/java/com/itsaky/androidide/inflater/IComponentFactory.kt

@@ -0,0 +1,51 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.itsaky.androidide.inflater
+
+import android.view.View
+import com.itsaky.androidide.inflater.internal.LayoutFile
+import com.itsaky.androidide.lookup.Lookup.Key
+
+/** Creates instances of views and attributes. */
+interface IComponentFactory {
+
+  /**
+   * Creates a new instance of [IView].
+   *
+   * @param file The layout file.
+   * @param name The fully qualified name of the view being created.
+   * @param view The Android view object.
+   * @return The [IView] instance.
+   */
+  fun createView(file: LayoutFile, name: String, view: View): IView
+
+  /**
+   * Creates a new [IAttribute] instance.
+   *
+   * @param view The view to which the attribute will be applied.
+   * @param namespace The namespace of the attribute.
+   * @param name The name of the attribute.
+   * @param value The value of the attribute.
+   * @return The [IAttribute] instance.
+   */
+  fun createAttr(view: IView, namespace: INamespace, name: String, value: String): IAttribute
+
+  companion object {
+    @JvmField val LAYOUT_INFLATER_COMPONENT_FACTORY_KEY = Key<IComponentFactory>()
+  }
+}

xml-inflater/src/main/java/com/itsaky/androidide/inflater/ILayoutInflater.kt

@@ -18,7 +18,11 @@
 package com.itsaky.androidide.inflater
 
 import android.view.ViewGroup
+import com.itsaky.androidide.inflater.events.IInflateEventsListener
 import com.itsaky.androidide.inflater.internal.LayoutInflaterImpl
+import com.itsaky.androidide.lookup.Lookup.Key
+import com.itsaky.androidide.projects.api.AndroidModule
+import java.io.Closeable
 import java.io.File
 
 /**
@@ -26,23 +30,61 @@ import java.io.File
  *
  * @author Akash Yadav
  */
-abstract class ILayoutInflater {
+interface ILayoutInflater : Closeable {
 
   /** The listener which listens to layout inflation events. */
-  abstract var inflationEventListener: IInflateEventsListener?
+  var inflationEventListener: IInflateEventsListener?
+
+  /** The [IComponentFactory] which is used to create components of the layout inflater. */
+  var componentFactory: IComponentFactory
+
+  /** The [AndroidModule] which is used to resolve resource references. */
+  var module: AndroidModule?
 
   /**
    * Inflate the given raw XML file.
    *
+   * **NOTE** : The [startParse][com.itsaky.androidide.inflater.utils.startParse] method is called
+   * if it hasn't been called yet. However, the [endParse]
+   * [com.itsaky.androidide.inflater.utils.endParse] method is not called after the parse is done.
+   * The caller is expected to call [close] when this inflater instance is no longer needed. The
+   * [close] method calls the [endParse] [com.itsaky.androidide.inflater.utils.endParse].
+   *
    * @param file The file to inflate.
    * @param parent The parent view.
    */
-  abstract fun inflate(file: File, parent: ViewGroup): List<IView>
+  fun inflate(file: File, parent: ViewGroup): List<IView>
+
+  fun closeSilently() {
+    try {
+      close()
+    } catch (err: Throwable) {
+      // ignored
+    }
+  }
   
   companion object {
+
+    /** The [Key] that can be used to lookup the layout inflater service. */
+    @JvmField val LOOKUP_KEY = Key<ILayoutInflater>()
+
+    /**
+     * Creates a new [ILayoutInflater] instance.
+     *
+     * @param module The [AndroidModule] that will be used to resolve resource references.
+     * @param componentFactory The [IComponentFactory] that will be used to create [ILayoutInflater]
+     * components.
+     */
     @JvmStatic
-    fun newInflater(): ILayoutInflater {
-      return LayoutInflaterImpl()
+    @JvmOverloads
+    fun newInflater(
+      module: AndroidModule? = null,
+      componentFactory: IComponentFactory = DefaultComponentFactory()
+    ): ILayoutInflater {
+      return LayoutInflaterImpl().also {
+        it.module = module
+        it.componentFactory = componentFactory
+      }
     }
   }
 }

xml-inflater/src/main/java/com/itsaky/androidide/inflater/IViewAdapter.kt

@@ -39,4 +39,13 @@ abstract class IViewAdapter : AbstractParser() {
    * @param view The view to apply basic attributes to.
    */
   abstract fun applyBasic(view: IView)
+
+  /**
+   * Called to check whether the given attribute required for the view. A required view cannot be
+   * removed by the user.
+   *
+   * @param attribute The attribute to check.
+   * @return `true` if the attribute is required, `false` otherwise.
+   */
+  abstract fun isRequiredAttribute(attribute: IAttribute): Boolean
 }

xml-inflater/src/main/java/com/itsaky/androidide/inflater/events/IInflateEventsListener.kt

@@ -0,0 +1,33 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.itsaky.androidide.inflater.events
+
+/**
+ * A listener which listens for XML layout inflation events.
+ *
+ * @author Akash Yadav
+ */
+interface IInflateEventsListener {
+
+  /**
+   * Called when an event occurs. The [event] parameter contains more information about the event.
+   *
+   * @param event The event.
+   */
+  fun onEvent(event: IInflationEvent<*>)
+}

xml-inflater/src/main/java/com/itsaky/androidide/inflater/events/IInflationEvent.kt

@@ -0,0 +1,25 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.itsaky.androidide.inflater.events
+
+/**
+ * An inflation event.
+ *
+ * @author Akash Yadav
+ */
+abstract class IInflationEvent<T>(val data: T)

xml-inflater/src/main/java/com/itsaky/androidide/inflater/events/inflationEvents.kt

@@ -15,38 +15,10 @@
  *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package com.itsaky.androidide.inflater
+package com.itsaky.androidide.inflater.events
 
-/**
- * A listener which listens for XML layout inflation events.
- *
- * @author Akash Yadav
- */
-interface IInflateEventsListener {
-
-  /**
-   * Called when an event occurs. The [event] parameter contains more information about the event.
-   *
-   * @param event The event.
-   */
-  fun onEvent(event: IInflationEvent<*>)
-
-  /**
-   * Allows the listener to intercept the view creation event and return view instance of their own.
-   *
-   * @param view The view that was created. The properties of this view is not expected to be
-   * modified (see [OnInflateViewEvent] instead).
-   * @return The view that should replace the [view] instance.
-   */
-  fun onInterceptCreateView(view: IView): IView = view
-}
-
-/**
- * An inflation event.
- *
- * @author Akash Yadav
- */
-abstract class IInflationEvent<T>(val data: T)
+import com.itsaky.androidide.inflater.IAttribute
+import com.itsaky.androidide.inflater.IView
 
 /** Indicates start of layout inflation. */
 class InflationStartEvent : IInflationEvent<Unit>(Unit)

xml-inflater/src/main/java/com/itsaky/androidide/inflater/internal/AttributeImpl.kt

@@ -20,9 +20,50 @@ package com.itsaky.androidide.inflater.internal
 import com.itsaky.androidide.inflater.IAttribute
 import com.itsaky.androidide.inflater.INamespace
 import com.itsaky.androidide.inflater.INamespace.Companion.ANDROID
+import com.itsaky.androidide.inflater.IView
+import com.itsaky.androidide.inflater.newAttribute
 
-data class AttributeImpl @JvmOverloads constructor(
+open class AttributeImpl
+@JvmOverloads
+constructor(
   override val namespace: INamespace = ANDROID,
   override val name: String,
   override var value: String
-) : IAttribute
+) : IAttribute {
+
+  @JvmOverloads
+  fun copyAttr(
+    view: IView? = null,
+    namespace: INamespace = this.namespace,
+    name: String = this.name,
+    value: String = this.value
+  ): IAttribute {
+    return newAttribute(view = view, namespace = namespace, name = name, value = value)
+  }
+
+  internal fun immutableCopy(): IAttribute {
+    return ImmutableAttributeImpl(this)
+  }
+
+  override fun equals(other: Any?): Boolean {
+    if (this === other) return true
+    if (other !is AttributeImpl) return false
+
+    if (namespace != other.namespace) return false
+    if (name != other.name) return false
+    if (value != other.value) return false
+
+    return true
+  }
+
+  override fun hashCode(): Int {
+    var result = namespace.hashCode()
+    result = 31 * result + name.hashCode()
+    result = 31 * result + value.hashCode()
+    return result
+  }
+
+  override fun toString(): String {
+    return "AttributeImpl(namespace=$namespace, name='$name', value='$value')"
+  }
+}

xml-inflater/src/main/java/com/itsaky/androidide/inflater/internal/ImmutableAttributeImpl.kt

@@ -0,0 +1,33 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.itsaky.androidide.inflater.internal
+
+import com.itsaky.androidide.inflater.IAttribute
+
+/**
+ * Immutable implementation of [IAttribute].
+ *
+ * @author Akash Yadav
+ */
+internal class ImmutableAttributeImpl(private val src: AttributeImpl) : IAttribute by src {
+  override var value: String
+    get() = src.value
+    set(value) {
+      throw UnsupportedOperationException("Immutable!")
+    }
+}

xml-inflater/src/main/java/com/itsaky/androidide/inflater/internal/ImmutableViewGroupImpl.kt

@@ -0,0 +1,58 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.itsaky.androidide.inflater.internal
+
+import com.itsaky.androidide.inflater.IView
+import com.itsaky.androidide.inflater.IViewGroup
+import com.itsaky.androidide.inflater.IViewGroup.OnHierarchyChangeListener
+
+/**
+ * Immutable implementation of [IViewGroup].
+ *
+ * @author Akash Yadav
+ */
+class ImmutableViewGroupImpl(private val src: IViewGroup) : IViewGroup by src {
+
+  override fun addChild(view: IView) {
+    throw UnsupportedOperationException("Immutable!")
+  }
+
+  override fun addChild(index: Int, view: IView) {
+    throw UnsupportedOperationException("Immutable!")
+  }
+
+  override fun removeChild(view: IView) {
+    throw UnsupportedOperationException("Immutable!")
+  }
+
+  override fun removeChild(index: Int) {
+    throw UnsupportedOperationException("Immutable!")
+  }
+
+  override fun set(index: Int, view: IView): IView {
+    throw UnsupportedOperationException("Immutable!")
+  }
+
+  override fun addOnHierarchyChangeListener(listener: OnHierarchyChangeListener) {
+    throw UnsupportedOperationException("Immutable!")
+  }
+
+  override fun removeOnHierarchyChangeListener(listener: OnHierarchyChangeListener) {
+    throw UnsupportedOperationException("Immutable!")
+  }
+}

xml-inflater/src/main/java/com/itsaky/androidide/inflater/internal/ImmutableViewImpl.kt

@@ -0,0 +1,56 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.itsaky.androidide.inflater.internal
+
+import android.view.View
+import com.itsaky.androidide.inflater.IAttribute
+import com.itsaky.androidide.inflater.IView
+import com.itsaky.androidide.inflater.IView.AttributeChangeListener
+import com.itsaky.androidide.inflater.IViewGroup
+
+/**
+ * An immutable implementation of [IView].
+ *
+ * @author Akash Yadav
+ */
+internal class ImmutableViewImpl(private val src: ViewImpl) : IView by src {
+  
+  override fun addAttribute(attribute: IAttribute, update: Boolean) {
+    throw UnsupportedOperationException("Immutable!")
+  }
+  
+  override fun removeAttribute(attribute: IAttribute) {
+    throw UnsupportedOperationException("Immutable!")
+  }
+  
+  override fun updateAttribute(attribute: IAttribute) {
+    throw UnsupportedOperationException("Immutable!")
+  }
+  
+  override fun onHighlightStateUpdated(highlight: Boolean) {
+    throw UnsupportedOperationException("Immutable!")
+  }
+  
+  override fun registerAttributeChangeListener(listener: AttributeChangeListener) {
+    throw UnsupportedOperationException("Immutable!")
+  }
+  
+  override fun unregisterAttributeChangeListener(listener: AttributeChangeListener) {
+    throw UnsupportedOperationException("Immutable!")
+  }
+}

xml-inflater/src/main/java/com/itsaky/androidide/inflater/internal/LayoutInflaterImpl.kt

@@ -33,25 +33,30 @@ import com.android.aaptcompiler.ResourceName
 import com.android.aaptcompiler.XmlProcessor
 import com.android.aaptcompiler.extractPathData
 import com.itsaky.androidide.aapt.logging.IDELogger
-import com.itsaky.androidide.inflater.IInflateEventsListener
+import com.itsaky.androidide.inflater.DefaultComponentFactory
+import com.itsaky.androidide.inflater.IAttribute
+import com.itsaky.androidide.inflater.IComponentFactory
+import com.itsaky.androidide.inflater.IComponentFactory.Companion.LAYOUT_INFLATER_COMPONENT_FACTORY_KEY
 import com.itsaky.androidide.inflater.ILayoutInflater
+import com.itsaky.androidide.inflater.INamespace
 import com.itsaky.androidide.inflater.IView
 import com.itsaky.androidide.inflater.IViewGroup
 import com.itsaky.androidide.inflater.InflateException
-import com.itsaky.androidide.inflater.InflationFinishEvent
-import com.itsaky.androidide.inflater.InflationStartEvent
-import com.itsaky.androidide.inflater.OnApplyAttributeEvent
-import com.itsaky.androidide.inflater.OnInflateViewEvent
+import com.itsaky.androidide.inflater.events.IInflateEventsListener
+import com.itsaky.androidide.inflater.events.InflationFinishEvent
+import com.itsaky.androidide.inflater.events.InflationStartEvent
+import com.itsaky.androidide.inflater.events.OnApplyAttributeEvent
+import com.itsaky.androidide.inflater.events.OnInflateViewEvent
 import com.itsaky.androidide.inflater.internal.utils.IDTable
 import com.itsaky.androidide.inflater.internal.utils.ViewFactory.createViewInstance
 import com.itsaky.androidide.inflater.internal.utils.ViewFactory.generateLayoutParams
-import com.itsaky.androidide.inflater.internal.utils.endParse
-import com.itsaky.androidide.inflater.internal.utils.isParsing
+import com.itsaky.androidide.inflater.utils.isParsing
 import com.itsaky.androidide.inflater.internal.utils.parseLayoutReference
-import com.itsaky.androidide.inflater.internal.utils.startParse
+import com.itsaky.androidide.inflater.utils.endParse
+import com.itsaky.androidide.inflater.utils.startParse
+import com.itsaky.androidide.lookup.Lookup
 import com.itsaky.androidide.projects.ProjectManager
 import com.itsaky.androidide.projects.api.AndroidModule
-import com.itsaky.androidide.utils.ILogger
 import com.itsaky.androidide.xml.widgets.Widget
 import com.itsaky.androidide.xml.widgets.WidgetTable
 import java.io.File
@@ -61,13 +66,19 @@ import java.io.File
  *
  * @author Akash Yadav
  */
-open class LayoutInflaterImpl : ILayoutInflater() {
+open class LayoutInflaterImpl : ILayoutInflater {
 
   override var inflationEventListener: IInflateEventsListener? = null
-  private val log = ILogger.newInstance("LayoutInflaterImpl")
+  override var module: AndroidModule? = null
   private var _primaryInflatingFile: File? = null
   private var _currentLayoutFile: LayoutFile? = null
 
+  override var componentFactory: IComponentFactory = DefaultComponentFactory()
+    set(value) {
+      field = value
+      Lookup.DEFAULT.update(LAYOUT_INFLATER_COMPONENT_FACTORY_KEY, value)
+    }
+
   protected val primaryInflatingFile: File
     get() = this._primaryInflatingFile!!
 
@@ -78,15 +89,27 @@ open class LayoutInflaterImpl : ILayoutInflater() {
     this._primaryInflatingFile = file
     IDTable.newRound()
     if (!isParsing) {
-      startParse(file)
+      if (this.module == null) {
+        startParse(file)
+        this.module = com.itsaky.androidide.inflater.utils.module
+      } else {
+        startParse(this.module!!)
+      }
     }
     inflationEventListener?.onEvent(InflationStartEvent())
     return doInflate(file, parent).apply {
       inflationEventListener?.onEvent(InflationFinishEvent(this))
       _primaryInflatingFile = null
-      endParse()
     }
   }
+  
+  override fun close() {
+    this.module = null
+    this.inflationEventListener = null
+    this._primaryInflatingFile = null
+    this._currentLayoutFile = null
+    endParse()
+  }
 
   protected open fun doInflate(file: File, parent: ViewGroup): List<IView> {
     val (processor, module) = processXmlFile(file)
@@ -210,8 +233,7 @@ open class LayoutInflaterImpl : ILayoutInflater() {
         val namespace =
           view.findNamespaceByUri(xmlAttribute.namespaceUri)
             ?: throw InflateException("Unknown namespace : ${xmlAttribute.namespaceUri}")
-        val attr =
-          AttributeImpl(namespace = namespace, name = xmlAttribute.name, value = xmlAttribute.value)
+        val attr = onCreateAttribute(view, namespace, xmlAttribute.name, xmlAttribute.value)
         view.addAttribute(attribute = attr, update = true)
         inflationEventListener?.onEvent(OnApplyAttributeEvent(view, attr))
       }
@@ -275,16 +297,26 @@ open class LayoutInflaterImpl : ILayoutInflater() {
   ): IView {
     return try {
       val v = createViewInstance(widget.qualifiedName, parent.context)
-      val view =
-        if (v is ViewGroup) {
-          ViewGroupImpl(currentLayoutFile, widget.qualifiedName, v)
-        } else ViewImpl(currentLayoutFile, widget.qualifiedName, v)
-      return inflationEventListener?.onInterceptCreateView(view) ?: view
+      return componentFactory.createView(currentLayoutFile, widget.qualifiedName, v)
     } catch (err: Throwable) {
       onCreateUnsupportedView("Unable to create view for widget ${widget.qualifiedName}", parent)
     }
   }
 
+  protected open fun onCreateAttribute(
+    view: ViewImpl,
+    namespace: INamespace,
+    name: String,
+    value: String
+  ): IAttribute {
+    return componentFactory.createAttr(
+      view = view,
+      namespace = namespace,
+      name = name,
+      value = value
+    )
+  }
+
   protected open fun addNamespaceDecls(element: XmlElement, view: ViewImpl) {
     if (element.namespaceDeclarationCount > 0) {
       for (xmlNamespace in element.namespaceDeclarationList) {
@@ -324,7 +356,8 @@ open class LayoutInflaterImpl : ILayoutInflater() {
   }
 
   private fun wrap(parent: ViewGroup): IViewGroup {
-    return ViewGroupImpl(currentLayoutFile, parent.javaClass.name, parent)
+    return componentFactory.createView(currentLayoutFile, parent.javaClass.name, parent)
+      as IViewGroup
   }
 
   private fun SourcePosition.lineCol(): String {

xml-inflater/src/main/java/com/itsaky/androidide/inflater/internal/ViewGroupImpl.kt

@@ -103,4 +103,8 @@ open class ViewGroupImpl(file: LayoutFile, name: String, view: ViewGroup) :
   protected open fun notifyOnViewRemoved(child: IView) {
     this.hierarchyChangeListeners.forEach { it.onViewRemoved(this, child) }
   }
+
+  override fun immutableCopy(): IViewGroup {
+    return ImmutableViewGroupImpl(this)
+  }
 }

xml-inflater/src/main/java/com/itsaky/androidide/inflater/internal/ViewImpl.kt

@@ -66,22 +66,19 @@ constructor(
   }
 
   override fun removeAttribute(attribute: IAttribute) {
+    
+    // reset the value of the attribute to its default value
+    attribute.value = ""
+    updateAttributeInternal(attribute = attribute, notify = false)
+    
     this._attributes.remove(attribute)
     notifyAttrRemoved(attribute)
-    // TODO(itsaky): Should attribute adapters handle this as well?
   }
 
   override fun updateAttribute(attribute: IAttribute) {
-    val existing =
-      findAttribute(attribute)
-        ?: throw IllegalArgumentException("Attribute '${attribute.name}' not found")
-    
-    val oldVal = existing.value
-    existing.value = attribute.value
-    applyAttribute(existing)
-    notifyAttrUpdated(attribute, oldVal)
+    updateAttributeInternal(attribute)
   }
-
+  
   override fun findAttribute(namespaceUri: String, name: String): IAttribute? {
     return this.attributes.find { it.namespace.uri == namespaceUri && it.name == name }
   }
@@ -144,6 +141,24 @@ constructor(
     builder.append("\n")
   }
   
+  internal open fun immutableCopy() : IView {
+    return ImmutableViewImpl(this)
+  }
+  
+  private fun updateAttributeInternal(attribute: IAttribute, notify: Boolean = true) {
+    val existing =
+      findAttribute(attribute)
+        ?: throw IllegalArgumentException("Attribute '${attribute.name}' not found")
+    
+    val oldVal = existing.value
+    existing.value = attribute.value
+    applyAttribute(existing)
+    
+    if (notify) {
+      notifyAttrUpdated(attribute, oldVal)
+    }
+  }
+  
   private fun notifyAttrAdded(attribute: IAttribute) {
     for (listener in this.attrChangeListeners) {
       listener.onAttributeAdded(this, attribute)

xml-inflater/src/main/java/com/itsaky/androidide/inflater/internal/adapters/TextViewAttrAdapter.kt

@@ -29,8 +29,8 @@ import com.itsaky.androidide.annotations.inflater.ViewAdapter
 import com.itsaky.androidide.inflater.IAttribute
 import com.itsaky.androidide.inflater.INamespace
 import com.itsaky.androidide.inflater.IView
-import com.itsaky.androidide.inflater.internal.AttributeImpl
 import com.itsaky.androidide.inflater.internal.LayoutFile
+import com.itsaky.androidide.inflater.newAttribute
 import java.util.regex.Pattern
 
 /**
@@ -43,12 +43,12 @@ open class TextViewAttrAdapter : ViewAttrAdapter() {
 
   override fun apply(view: IView, attribute: IAttribute): Boolean {
     return doApply<TextView>(view, attribute) {
-        _: LayoutFile,
-        context: Context,
-        _: LayoutParams,
-        _: INamespace,
-        name: String,
-        value: String ->
+      _: LayoutFile,
+      context: Context,
+      _: LayoutParams,
+      _: INamespace,
+      name: String,
+      value: String ->
       val drawables = compoundDrawables
       val drawablesRelative = compoundDrawablesRelative
       var applied = true
@@ -130,7 +130,7 @@ open class TextViewAttrAdapter : ViewAttrAdapter() {
 
   override fun applyBasic(view: IView) {
     super.applyBasic(view)
-    view.addAttribute(AttributeImpl(name = "text", value = "AndroidIDE"))
+    view.addAttribute(newAttribute(view = view, name = "text", value = "AndroidIDE"))
   }
 
   protected open fun parseTextStyle(value: String): Int {

xml-inflater/src/main/java/com/itsaky/androidide/inflater/internal/adapters/ViewAttrAdapter.kt

@@ -36,9 +36,9 @@ import com.itsaky.androidide.inflater.IAttribute
 import com.itsaky.androidide.inflater.INamespace
 import com.itsaky.androidide.inflater.IView
 import com.itsaky.androidide.inflater.IViewAdapter
-import com.itsaky.androidide.inflater.internal.AttributeImpl
 import com.itsaky.androidide.inflater.internal.LayoutFile
 import com.itsaky.androidide.inflater.internal.ViewImpl
+import com.itsaky.androidide.inflater.newAttribute
 
 /**
  * Attribute adapter for [View].
@@ -132,8 +132,20 @@ open class ViewAttrAdapter : IViewAdapter() {
   }
 
   override fun applyBasic(view: IView) {
-    view.addAttribute(AttributeImpl(name = "layout_height", value = "wrap_content"))
-    view.addAttribute(AttributeImpl(name = "layout_width", value = "wrap_content"))
+    view.addAttribute(newAttribute(view = view, name = "layout_height", value = "wrap_content"))
+    view.addAttribute(newAttribute(view = view, name = "layout_width", value = "wrap_content"))
+  }
+
+  override fun isRequiredAttribute(attribute: IAttribute): Boolean {
+    if (attribute.namespace.uri != INamespace.ANDROID.uri) {
+      return false
+    }
+
+    return when (attribute.name) {
+      "layout_width",
+      "layout_height" -> true
+      else -> false
+    }
   }
 
   protected open fun applyLayoutParams(

xml-inflater/src/main/java/com/itsaky/androidide/inflater/internal/utils/basicParseUtils.kt

@@ -59,6 +59,7 @@ import com.android.aaptcompiler.tryParseFlagSymbol
 import com.android.aaptcompiler.tryParseInt
 import com.android.aaptcompiler.tryParseReference
 import com.itsaky.androidide.inflater.drawable.DrawableParserFactory
+import com.itsaky.androidide.inflater.utils.module
 import com.itsaky.androidide.utils.ILogger
 import java.io.File
 

xml-inflater/src/main/java/com/itsaky/androidide/inflater/internal/utils/lookup.kt

@@ -26,6 +26,7 @@ import com.android.aaptcompiler.ResourceGroup
 import com.android.aaptcompiler.ResourceName
 import com.android.aaptcompiler.ResourceTable
 import com.android.aaptcompiler.ResourceTablePackage
+import com.itsaky.androidide.inflater.utils.module
 import com.itsaky.androidide.utils.ILogger
 
 private val log: ILogger = ILogger.newInstance("ParseLookupUtils")

xml-inflater/src/main/java/com/itsaky/androidide/inflater/utils/inflaterUtils.kt

@@ -0,0 +1,45 @@
+/*
+ *  This file is part of AndroidIDE.
+ *
+ *  AndroidIDE is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  AndroidIDE is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package com.itsaky.androidide.inflater
+
+import com.itsaky.androidide.inflater.internal.AttributeImpl
+import com.itsaky.androidide.lookup.Lookup
+
+/** Get the [ILayoutInflater] registered with [Lookup]. */
+fun lookupLayoutInflater(): ILayoutInflater? {
+  return Lookup.DEFAULT.lookup(ILayoutInflater.LOOKUP_KEY)
+}
+
+/** Get the [IComponentFactory] registered with [Lookup]. */
+fun lookupComponentFactory(): IComponentFactory? {
+  return Lookup.DEFAULT.lookup(IComponentFactory.LAYOUT_INFLATER_COMPONENT_FACTORY_KEY)
+}
+
+@JvmOverloads
+fun newAttribute(
+  view: IView? = null,
+  namespace: INamespace = INamespace.ANDROID,
+  name: String,
+  value: String
+): IAttribute {
+  val componentFactory = lookupComponentFactory()
+  if (componentFactory != null && view != null) {
+    return componentFactory.createAttr(view, namespace, name, value)
+  }
+  return AttributeImpl(namespace, name, value)
+}

xml-inflater/src/main/java/com/itsaky/androidide/inflater/utils/module.kt

@@ -15,7 +15,7 @@
  *   along with AndroidIDE.  If not, see <https://www.gnu.org/licenses/>.
  */
 
-package com.itsaky.androidide.inflater.internal.utils
+package com.itsaky.androidide.inflater.utils
 
 import com.itsaky.androidide.projects.ProjectManager
 import com.itsaky.androidide.projects.api.AndroidModule

xml-inflater/src/test/java/com/itsaky/androidide/inflater/LayoutInflaterTest.kt

@@ -20,17 +20,16 @@ package com.itsaky.androidide.inflater
 import android.view.View
 import android.widget.LinearLayout
 import com.google.common.truth.Truth.assertThat
-import com.itsaky.androidide.inflater.internal.AttributeImpl
 import com.itsaky.androidide.inflater.internal.LayoutInflaterImpl
 import com.itsaky.androidide.inflater.internal.ViewGroupImpl
 import com.itsaky.androidide.inflater.internal.ViewImpl
 import com.itsaky.androidide.inflater.internal.utils.IDTable
 import com.itsaky.androidide.projects.ProjectManager
 import com.itsaky.androidide.projects.api.AndroidModule
-import java.io.File
 import org.junit.Test
 import org.junit.runner.RunWith
 import org.robolectric.RobolectricTestRunner
+import java.io.File
 
 /** @author Akash Yadav */
 @RunWith(RobolectricTestRunner::class)
@@ -70,11 +69,11 @@ class LayoutInflaterTest {
 
             (inflated as ViewImpl).attributes.apply {
               assertThat(this)
-                .contains(AttributeImpl(INamespace.ANDROID, "id", "@+id/template_view"))
+                .contains(newAttribute(inflated, INamespace.ANDROID, "id", "@+id/template_view"))
               assertThat(this)
-                .contains(AttributeImpl(INamespace.ANDROID, "layout_height", "match_parent"))
+                .contains(newAttribute(inflated, INamespace.ANDROID, "layout_height", "match_parent"))
               assertThat(this)
-                .contains(AttributeImpl(INamespace.ANDROID, "layout_width", "match_parent"))
+                .contains(newAttribute(inflated, INamespace.ANDROID, "layout_width", "match_parent"))
             }
           }
         }

xml-inflater/src/test/java/com/itsaky/androidide/inflater/XmlInflaterTest.kt

@@ -18,8 +18,8 @@
 package com.itsaky.androidide.inflater
 
 import androidx.appcompat.app.AppCompatActivity
-import com.itsaky.androidide.inflater.internal.utils.endParse
-import com.itsaky.androidide.inflater.internal.utils.startParse
+import com.itsaky.androidide.inflater.utils.endParse
+import com.itsaky.androidide.inflater.utils.startParse
 import com.itsaky.androidide.lookup.Lookup
 import com.itsaky.androidide.projects.ProjectManager
 import com.itsaky.androidide.projects.api.AndroidModule