Make system tethering entry always available

mobile/src/main/java/be/mygod/vpnhotspot/TetheringFragment.kt

@@ -13,16 +13,16 @@ import android.support.v7.util.SortedList
 import android.support.v7.widget.DefaultItemAnimator
 import android.support.v7.widget.LinearLayoutManager
 import android.support.v7.widget.RecyclerView
-import android.text.Html
+import android.support.v7.widget.Toolbar
 import android.view.LayoutInflater
+import android.view.MenuItem
 import android.view.View
 import android.view.ViewGroup
 import be.mygod.vpnhotspot.App.Companion.app
 import be.mygod.vpnhotspot.databinding.FragmentTetheringBinding
 import be.mygod.vpnhotspot.databinding.ListitemInterfaceBinding
-import be.mygod.vpnhotspot.widget.TextViewLinkHandler
 
-class TetheringFragment : Fragment() {
+class TetheringFragment : Fragment(), Toolbar.OnMenuItemClickListener {
     companion object {
         /**
          * Source: https://android.googlesource.com/platform/frameworks/base/+/61fa313/core/res/res/values/config.xml#328
@@ -115,11 +115,8 @@ class TetheringFragment : Fragment() {
 
     override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View? {
         binding = DataBindingUtil.inflate(inflater, R.layout.fragment_tethering, container, false)
-        binding.empty.text = Html.fromHtml(getString(R.string.tethering_no_interfaces))
-        binding.empty.movementMethod = TextViewLinkHandler.create {
-            startActivity(Intent().setClassName("com.android.settings",
-                    "com.android.settings.Settings\$TetherSettingsActivity"))
-        }
+        binding.toolbar.inflateMenu(R.menu.tethering)
+        binding.toolbar.setOnMenuItemClickListener(this)
         binding.interfaces.layoutManager = LinearLayoutManager(context, LinearLayoutManager.VERTICAL, false)
         val animator = DefaultItemAnimator()
         animator.supportsChangeAnimations = false   // prevent fading-in/out when rebinding
@@ -149,6 +146,15 @@ class TetheringFragment : Fragment() {
         super.onStop()
     }
 
+    override fun onMenuItemClick(item: MenuItem) = when (item.itemId) {
+        R.id.systemTethering -> {
+            startActivity(Intent().setClassName("com.android.settings",
+                    "com.android.settings.Settings\$TetherSettingsActivity"))
+            true
+        }
+        else -> false
+    }
+
     private fun crossFade(old: View, new: View) {
         val shortAnimTime = resources.getInteger(android.R.integer.config_shortAnimTime).toLong()
         old.animate().alpha(0F).setListener(object : AnimatorListenerAdapter() {

mobile/src/main/java/be/mygod/vpnhotspot/widget/TextViewLinkHandler.kt

@@ -1,32 +0,0 @@
-package be.mygod.vpnhotspot.widget
-
-import android.text.Spannable
-import android.text.method.LinkMovementMethod
-import android.text.style.URLSpan
-import android.view.MotionEvent
-import android.widget.TextView
-
-/**
- * Based on: https://stackoverflow.com/a/32443884/2245107
- */
-abstract class TextViewLinkHandler : LinkMovementMethod() {
-    companion object {
-        fun create(handler: (String) -> Unit) = object : TextViewLinkHandler() {
-            override fun onLinkClick(url: String) = handler(url)
-        }
-    }
-
-    override fun onTouchEvent(widget: TextView, buffer: Spannable, event: MotionEvent): Boolean {
-        if (event.action != MotionEvent.ACTION_UP) return super.onTouchEvent(widget, buffer, event)
-        val x = event.x - widget.totalPaddingLeft + widget.scrollX
-        val y = event.y.toInt() - widget.totalPaddingTop + widget.scrollY
-        val layout = widget.layout
-        val line = layout.getLineForVertical(y)
-        val off = layout.getOffsetForHorizontal(line, x)
-        val link = buffer.getSpans(off, off, URLSpan::class.java)
-        if (link.isNotEmpty()) onLinkClick(link[0].url)
-        return true
-    }
-
-    abstract fun onLinkClick(url: String)
-}

mobile/src/main/res/drawable/ic_action_settings.xml

@@ -4,6 +4,6 @@
         android:viewportWidth="24.0"
         android:viewportHeight="24.0">
     <path
-        android:fillColor="#fff"
+        android:fillColor="#000"
         android:pathData="M19.43,12.98c0.04,-0.32 0.07,-0.64 0.07,-0.98s-0.03,-0.66 -0.07,-0.98l2.11,-1.65c0.19,-0.15 0.24,-0.42 0.12,-0.64l-2,-3.46c-0.12,-0.22 -0.39,-0.3 -0.61,-0.22l-2.49,1c-0.52,-0.4 -1.08,-0.73 -1.69,-0.98l-0.38,-2.65C14.46,2.18 14.25,2 14,2h-4c-0.25,0 -0.46,0.18 -0.49,0.42l-0.38,2.65c-0.61,0.25 -1.17,0.59 -1.69,0.98l-2.49,-1c-0.23,-0.09 -0.49,0 -0.61,0.22l-2,3.46c-0.13,0.22 -0.07,0.49 0.12,0.64l2.11,1.65c-0.04,0.32 -0.07,0.65 -0.07,0.98s0.03,0.66 0.07,0.98l-2.11,1.65c-0.19,0.15 -0.24,0.42 -0.12,0.64l2,3.46c0.12,0.22 0.39,0.3 0.61,0.22l2.49,-1c0.52,0.4 1.08,0.73 1.69,0.98l0.38,2.65c0.03,0.24 0.24,0.42 0.49,0.42h4c0.25,0 0.46,-0.18 0.49,-0.42l0.38,-2.65c0.61,-0.25 1.17,-0.59 1.69,-0.98l2.49,1c0.23,0.09 0.49,0 0.61,-0.22l2,-3.46c0.12,-0.22 0.07,-0.49 -0.12,-0.64l-2.11,-1.65zM12,15.5c-1.93,0 -3.5,-1.57 -3.5,-3.5s1.57,-3.5 3.5,-3.5 3.5,1.57 3.5,3.5 -1.57,3.5 -3.5,3.5z"/>
 </vector>

mobile/src/main/res/layout/fragment_tethering.xml

@@ -22,9 +22,8 @@
                 android:id="@+id/empty"
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
-                android:linksClickable="true"
                 android:padding="16dp"
-                tools:text="@string/tethering_no_interfaces"/>
+                android:text="@string/tethering_no_interfaces"/>
             <android.support.v7.widget.RecyclerView
                 android:id="@+id/interfaces"
                 android:layout_width="match_parent"

mobile/src/main/res/menu/tethering.xml

@@ -0,0 +1,10 @@
+<?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/systemTethering"
+        android:icon="@drawable/ic_action_settings"
+        android:title="@string/tethering_system_tethering"
+        app:showAsAction="ifRoom"/>
+</menu>

mobile/src/main/res/values-zh-rCN/strings.xml

@@ -35,7 +35,8 @@
     <string name="repeater_failure_reason_no_service_requests">未添加服务请求</string>
     <string name="repeater_failure_reason_unknown">未知 #%d</string>
 
-    <string name="tethering_no_interfaces"><![CDATA[请先打开<a href=&quot;#&quot;>系统共享</a>后使用此功能。]]></string>
+    <string name="tethering_system_tethering">系统共享</string>
+    <string name="tethering_no_interfaces">请先打开系统共享后使用此功能。</string>
 
     <string name="settings_service">服务</string>
     <string name="settings_service_dns">下游 DNS 服务器:端口</string>

mobile/src/main/res/values/strings.xml

@@ -37,8 +37,8 @@
     <string name="repeater_failure_reason_no_service_requests">no service requests added</string>
     <string name="repeater_failure_reason_unknown">unknown #%d</string>
 
-    <string name="tethering_no_interfaces"><![CDATA[To use this feature, turn on any <a href=&quot;#&quot;>system
-        tethering</a> first.]]></string>
+    <string name="tethering_system_tethering">System tethering</string>
+    <string name="tethering_no_interfaces">To use this feature, turn on any system tethering first.</string>
 
     <string name="settings_service">Service</string>
     <string name="settings_service_dns">Downstream DNS server:port</string>