adding basic text highlighting in the editor

app/build.gradle

@@ -45,7 +45,7 @@ ext {
 }
 
 dependencies {
-    implementation 'com.simplemobiletools:commons:4.6.0'
+    implementation 'com.simplemobiletools:commons:4.6.2'
 
     implementation files('../libs/RootTools.jar')
 

app/src/main/AndroidManifest.xml

@@ -52,6 +52,15 @@
         <activity
             android:name=".activities.ReadTextActivity"
             android:label="@string/file_editor">
+
+            <meta-data
+                android:name="android.app.default_searchable"
+                android:resource="@xml/searchable"/>
+
+            <intent-filter>
+                <action android:name="android.intent.action.SEARCH"/>
+            </intent-filter>
+
             <intent-filter>
                 <action android:name="android.intent.action.VIEW"/>
                 <category android:name="android.intent.category.DEFAULT"/>

app/src/main/kotlin/com/simplemobiletools/filemanager/activities/ReadTextActivity.kt

@@ -1,7 +1,11 @@
 package com.simplemobiletools.filemanager.activities
 
+import android.app.SearchManager
+import android.content.Context
 import android.net.Uri
 import android.os.Bundle
+import android.support.v4.view.MenuItemCompat
+import android.support.v7.widget.SearchView
 import android.view.Menu
 import android.view.MenuItem
 import com.simplemobiletools.commons.extensions.*
@@ -17,6 +21,10 @@ import java.io.File
 
 class ReadTextActivity : SimpleActivity() {
     private var filePath = ""
+    private var originalText = ""
+    private var isSearchOpen = false
+
+    private var searchMenuItem: MenuItem? = null
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -35,6 +43,7 @@ class ReadTextActivity : SimpleActivity() {
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
         menuInflater.inflate(R.menu.menu_editor, menu)
+        setupSearch(menu)
         return true
     }
 
@@ -47,6 +56,43 @@ class ReadTextActivity : SimpleActivity() {
         return true
     }
 
+    private fun setupSearch(menu: Menu) {
+        val searchManager = getSystemService(Context.SEARCH_SERVICE) as SearchManager
+        searchMenuItem = menu.findItem(R.id.search)
+        (searchMenuItem!!.actionView as SearchView).apply {
+            setSearchableInfo(searchManager.getSearchableInfo(componentName))
+            isSubmitButtonEnabled = false
+            setOnQueryTextListener(object : android.support.v7.widget.SearchView.OnQueryTextListener {
+                override fun onQueryTextSubmit(query: String) = false
+
+                override fun onQueryTextChange(newText: String): Boolean {
+                    if (isSearchOpen) {
+                        searchQueryChanged(newText)
+                    }
+                    return true
+                }
+            })
+        }
+
+        MenuItemCompat.setOnActionExpandListener(searchMenuItem, object : MenuItemCompat.OnActionExpandListener {
+            override fun onMenuItemActionExpand(item: MenuItem?): Boolean {
+                isSearchOpen = true
+                searchQueryChanged("")
+                return true
+            }
+
+            override fun onMenuItemActionCollapse(item: MenuItem?): Boolean {
+                isSearchOpen = false
+                return true
+            }
+        })
+    }
+
+    private fun searchQueryChanged(text: String) {
+        val textToHighlight = if (text.length < 2) "" else text
+        read_text_view.setText(originalText.highlightTextPart(textToHighlight, getAdjustedPrimaryColor(), true))
+    }
+
     private fun saveText() {
         if (filePath.isEmpty()) {
             filePath = getRealPathFromURI(intent.data) ?: ""
@@ -78,7 +124,7 @@ class ReadTextActivity : SimpleActivity() {
             return
         }
 
-        val text = if (uri.scheme == "file") {
+        originalText = if (uri.scheme == "file") {
             filePath = uri.path
             val file = File(filePath)
             if (file.exists()) {
@@ -97,6 +143,6 @@ class ReadTextActivity : SimpleActivity() {
             }
         }
 
-        read_text_view.setText(text)
+        read_text_view.setText(originalText)
     }
 }

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

@@ -11,6 +11,7 @@
         android:layout_height="wrap_content"
         android:background="@null"
         android:padding="@dimen/medium_margin"
+        android:inputType="textMultiLine|textNoSuggestions"
         android:textCursorDrawable="@null"
         android:textSize="@dimen/smaller_text_size"/>
 

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

@@ -1,6 +1,12 @@
 <?xml version="1.0" encoding="utf-8"?>
 <menu xmlns:android="http://schemas.android.com/apk/res/android"
       xmlns:app="http://schemas.android.com/apk/res-auto">
+    <item
+        android:id="@+id/search"
+        android:icon="@drawable/ic_search"
+        android:title="@string/search"
+        app:actionViewClass="android.support.v7.widget.SearchView"
+        app:showAsAction="collapseActionView|ifRoom"/>
     <item
         android:id="@+id/menu_save"
         android:icon="@drawable/ic_save"