adding Search at the mimetype activity

app/src/main/kotlin/com/simplemobiletools/filemanager/pro/activities/MimeTypesActivity.kt

@@ -32,6 +32,7 @@ import java.util.*
 class MimeTypesActivity : SimpleActivity(), ItemOperationsListener {
     private var isSearchOpen = false
     private var currentMimeType = ""
+    private var lastSearchedText = ""
     private var searchMenuItem: MenuItem? = null
     private var zoomListener: MyRecyclerView.MyZoomListener? = null
     private var storedItems = ArrayList<ListItem>()
@@ -124,7 +125,44 @@ class MimeTypesActivity : SimpleActivity(), ItemOperationsListener {
 
     override fun selectedPaths(paths: ArrayList<String>) {}
 
-    override fun searchQueryChanged(text: String) {}
+    override fun searchQueryChanged(text: String) {
+        val searchText = text.trim()
+        lastSearchedText = searchText
+        when {
+            searchText.isEmpty() -> {
+                mimetypes_list.beVisible()
+                getRecyclerAdapter()?.updateItems(storedItems)
+                mimetypes_placeholder.beGone()
+                mimetypes_placeholder_2.beGone()
+            }
+            searchText.length == 1 -> {
+                mimetypes_list.beGone()
+                mimetypes_placeholder.beVisible()
+                mimetypes_placeholder_2.beVisible()
+            }
+            else -> {
+                ensureBackgroundThread {
+                    if (lastSearchedText != searchText) {
+                        return@ensureBackgroundThread
+                    }
+
+                    val listItems = storedItems.filter { it.name.contains(searchText, true) } as ArrayList<ListItem>
+
+                    runOnUiThread {
+                        getRecyclerAdapter()?.updateItems(listItems, text)
+                        mimetypes_list.beVisibleIf(listItems.isNotEmpty())
+                        mimetypes_placeholder.beVisibleIf(listItems.isEmpty())
+                        mimetypes_placeholder_2.beGone()
+
+                        mimetypes_list.onGlobalLayout {
+                            items_fastscroller.setScrollToY(mimetypes_list.computeVerticalScrollOffset())
+                            calculateContentHeight(listItems)
+                        }
+                    }
+                }
+            }
+        }
+    }
 
     override fun setupDateTimeFormat() {}
 
@@ -163,6 +201,7 @@ class MimeTypesActivity : SimpleActivity(), ItemOperationsListener {
 
                 override fun onQueryTextChange(newText: String): Boolean {
                     if (isSearchOpen) {
+                        searchQueryChanged(newText)
                     }
                     return true
                 }
@@ -172,16 +211,32 @@ class MimeTypesActivity : SimpleActivity(), ItemOperationsListener {
         MenuItemCompat.setOnActionExpandListener(searchMenuItem, object : MenuItemCompat.OnActionExpandListener {
             override fun onMenuItemActionExpand(item: MenuItem?): Boolean {
                 isSearchOpen = true
+                searchOpened()
                 return true
             }
 
             override fun onMenuItemActionCollapse(item: MenuItem?): Boolean {
                 isSearchOpen = false
+                searchClosed()
                 return true
             }
         })
     }
 
+    fun searchOpened() {
+        isSearchOpen = true
+        lastSearchedText = ""
+    }
+
+    fun searchClosed() {
+        isSearchOpen = false
+        lastSearchedText = ""
+
+        mimetypes_list.beVisible()
+        mimetypes_placeholder.beGone()
+        mimetypes_placeholder_2.beGone()
+    }
+
     private fun getProperFileDirItems(callback: (ArrayList<FileDirItem>) -> Unit) {
         val fileDirItems = ArrayList<FileDirItem>()
         val showHidden = config.shouldShowHidden

app/src/main/kotlin/com/simplemobiletools/filemanager/pro/fragments/ItemsFragment.kt

@@ -28,7 +28,8 @@ import java.io.File
 import java.util.*
 import kotlin.collections.ArrayList
 
-class ItemsFragment(context: Context, attributeSet: AttributeSet) : MyViewPagerFragment(context, attributeSet), ItemOperationsListener, Breadcrumbs.BreadcrumbsListener {
+class ItemsFragment(context: Context, attributeSet: AttributeSet) : MyViewPagerFragment(context, attributeSet), ItemOperationsListener,
+    Breadcrumbs.BreadcrumbsListener {
     private var showHidden = false
     private var skipItemUpdating = false
     private var isSearchOpen = false
@@ -118,8 +119,10 @@ class ItemsFragment(context: Context, attributeSet: AttributeSet) : MyViewPagerF
                 breadcrumbs.updateFontSize(context!!.getTextSize())
             }
 
-            ItemsAdapter(activity as SimpleActivity, storedItems, this, items_list, isPickMultipleIntent, items_fastscroller,
+            ItemsAdapter(
-                items_swipe_refresh) {
+                activity as SimpleActivity, storedItems, this, items_list, isPickMultipleIntent, items_fastscroller,
+                items_swipe_refresh
+            ) {
                 if ((it as? ListItem)?.isSectionTitle == true) {
                     openDirectory(it.mPath)
                     searchClosed()
@@ -264,24 +267,24 @@ class ItemsFragment(context: Context, attributeSet: AttributeSet) : MyViewPagerF
     override fun searchQueryChanged(text: String) {
         val searchText = text.trim()
         lastSearchedText = searchText
-        ensureBackgroundThread {
+        if (context == null) {
-            if (context == null) {
+            return
-                return@ensureBackgroundThread
+        }
-            }
 
-            when {
+        when {
-                searchText.isEmpty() -> activity?.runOnUiThread {
+            searchText.isEmpty() -> {
-                    items_list.beVisible()
+                items_list.beVisible()
-                    getRecyclerAdapter()?.updateItems(storedItems)
+                getRecyclerAdapter()?.updateItems(storedItems)
-                    items_placeholder.beGone()
+                items_placeholder.beGone()
-                    items_placeholder_2.beGone()
+                items_placeholder_2.beGone()
-                }
+            }
-                searchText.length == 1 -> activity?.runOnUiThread {
+            searchText.length == 1 -> {
-                    items_list.beGone()
+                items_list.beGone()
-                    items_placeholder.beVisible()
+                items_placeholder.beVisible()
-                    items_placeholder_2.beVisible()
+                items_placeholder_2.beVisible()
-                }
+            }
-                else -> {
+            else -> {
+                ensureBackgroundThread {
                     val files = searchFiles(searchText, currentPath)
                     files.sortBy { it.getParentPath() }
 

app/src/main/res/layout/activity_mimetypes.xml

@@ -5,6 +5,36 @@
     android:layout_width="wrap_content"
     android:layout_height="wrap_content">
 
+    <com.simplemobiletools.commons.views.MyTextView
+        android:id="@+id/mimetypes_placeholder"
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:layout_centerHorizontal="true"
+        android:alpha="0.8"
+        android:gravity="center"
+        android:paddingStart="@dimen/activity_margin"
+        android:paddingTop="@dimen/activity_margin"
+        android:paddingEnd="@dimen/activity_margin"
+        android:text="@string/no_items_found"
+        android:textSize="@dimen/bigger_text_size"
+        android:textStyle="italic"
+        android:visibility="gone" />
+
+    <com.simplemobiletools.commons.views.MyTextView
+        android:id="@+id/mimetypes_placeholder_2"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_below="@+id/mimetypes_placeholder"
+        android:layout_centerHorizontal="true"
+        android:alpha="0.8"
+        android:background="?attr/selectableItemBackground"
+        android:gravity="center"
+        android:padding="@dimen/activity_margin"
+        android:text="@string/type_2_characters"
+        android:textSize="@dimen/bigger_text_size"
+        android:textStyle="italic"
+        android:visibility="gone" />
+
     <com.simplemobiletools.commons.views.MyRecyclerView
         android:id="@+id/mimetypes_list"
         android:layout_width="match_parent"