make sure we have write storage permission before doing anything at editor

Author: tibbi

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

@@ -1,6 +1,8 @@
 package com.simplemobiletools.filemanager.activities
 
 import android.os.Bundle
+import com.simplemobiletools.commons.extensions.toast
+import com.simplemobiletools.commons.helpers.PERMISSION_WRITE_STORAGE
 import com.simplemobiletools.filemanager.R
 import com.simplemobiletools.filemanager.extensions.config
 import kotlinx.android.synthetic.main.activity_read_text.*
@@ -11,6 +13,17 @@ class ReadTextActivity : SimpleActivity() {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_read_text)
 
+        handlePermission(PERMISSION_WRITE_STORAGE) {
+            if (it) {
+                checkIntent()
+            } else {
+                toast(R.string.no_storage_permissions)
+                finish()
+            }
+        }
+    }
+
+    private fun checkIntent() {
         read_text_view.setTextColor(config.textColor)
         val uri = intent.data
         if (uri.scheme == "file") {