Implemented extension search functionality. (#2211)

app/src/main/java/eu/kanade/tachiyomi/ui/extension/ExtensionController.kt

@@ -1,10 +1,14 @@
 package eu.kanade.tachiyomi.ui.extension
 
 import android.support.v7.widget.LinearLayoutManager
+import android.support.v7.widget.SearchView
 import android.view.LayoutInflater
+import android.view.Menu
+import android.view.MenuInflater
 import android.view.View
 import android.view.ViewGroup
 import com.jakewharton.rxbinding.support.v4.widget.refreshes
+import com.jakewharton.rxbinding.support.v7.widget.queryTextChanges
 import eu.davidea.flexibleadapter.FlexibleAdapter
 import eu.davidea.flexibleadapter.items.IFlexible
 import eu.kanade.tachiyomi.R
@@ -28,6 +32,10 @@ open class ExtensionController : NucleusController<ExtensionPresenter>(),
      */
     private var adapter: FlexibleAdapter<IFlexible<*>>? = null
 
+    private var extensions: List<ExtensionItem> = emptyList()
+
+    private var query = ""
+
     init {
         setHasOptionsMenu(true)
     }
@@ -84,6 +92,30 @@ open class ExtensionController : NucleusController<ExtensionPresenter>(),
         }
     }
 
+    override fun onCreateOptionsMenu(menu: Menu, inflater: MenuInflater) {
+        inflater.inflate(R.menu.extension_main, menu)
+
+        val searchItem = menu.findItem(R.id.action_search)
+        val searchView = searchItem.actionView as SearchView
+        searchView.maxWidth = Int.MAX_VALUE
+
+        if (!query.isEmpty()) {
+            searchItem.expandActionView()
+            searchView.setQuery(query, true)
+            searchView.clearFocus()
+        }
+
+        searchView.queryTextChanges()
+            .filter { router.backstack.lastOrNull()?.controller() == this }
+            .subscribeUntilDestroy {
+                query = it.toString()
+                drawExtensions()
+            }
+
+        // Fixes problem with the overflow icon showing up in lieu of search
+        searchItem.fixExpand()
+    }
+
     override fun onItemClick(position: Int): Boolean {
         val extension = (adapter?.getItem(position) as? ExtensionItem)?.extension ?: return false
         if (extension is Extension.Installed) {
@@ -114,7 +146,19 @@ open class ExtensionController : NucleusController<ExtensionPresenter>(),
 
     fun setExtensions(extensions: List<ExtensionItem>) {
         ext_swipe_refresh?.isRefreshing = false
-        adapter?.updateDataSet(extensions)
+        this.extensions = extensions
+        drawExtensions()
+    }
+
+    fun drawExtensions() {
+        if (!query.isBlank()) {
+            adapter?.updateDataSet(
+                    extensions.filter {
+                        it.extension.name.contains(query, ignoreCase = true)
+                    })
+        } else {
+            adapter?.updateDataSet(extensions)
+        }
     }
 
     fun downloadUpdate(item: ExtensionItem) {

app/src/main/java/eu/kanade/tachiyomi/ui/extension/ExtensionGroupHolder.kt

@@ -11,6 +11,6 @@ class ExtensionGroupHolder(view: View, adapter: FlexibleAdapter<*>) :
 
     @SuppressLint("SetTextI18n")
     fun bind(item: ExtensionGroupItem) {
-        title.text = item.name + " (" + item.size + ")"
+        title.text = item.name
     }
 }

app/src/main/res/menu/extension_main.xml

@@ -0,0 +1,11 @@
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
+
+    <item
+        android:id="@+id/action_search"
+        android:title="@string/action_search"
+        android:icon="@drawable/ic_search_white_24dp"
+        app:showAsAction="collapseActionView|ifRoom"
+        app:actionViewClass="android.support.v7.widget.SearchView"/>
+
+</menu>