Add alternative keyboard at the authentication screen

app/src/main/java/io/timelimit/android/ui/login/NewLoginFragment.kt

@@ -16,6 +16,7 @@
 package io.timelimit.android.ui.login
 
 import android.content.Context
+import android.os.Build
 import android.os.Bundle
 import android.view.LayoutInflater
 import android.view.View
@@ -32,6 +33,7 @@ import io.timelimit.android.data.model.User
 import io.timelimit.android.databinding.NewLoginFragmentBinding
 import io.timelimit.android.extensions.setOnEnterListenr
 import io.timelimit.android.ui.main.getActivityViewModel
+import io.timelimit.android.ui.view.KeyboardViewListener
 
 class NewLoginFragment: DialogFragment() {
     companion object {
@@ -94,7 +96,21 @@ class NewLoginFragment: DialogFragment() {
         binding.userList.recycler.layoutManager = LinearLayoutManager(context)
 
         binding.enterPassword.apply {
-            password.setOnEnterListenr {
+            showKeyboardButton.setOnClickListener {
+                showCustomKeyboard = !showCustomKeyboard
+
+                if (showCustomKeyboard) {
+                    inputMethodManager.hideSoftInputFromWindow(password.windowToken, 0)
+                } else {
+                    inputMethodManager.showSoftInput(password, 0)
+                }
+
+                if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.LOLLIPOP) {
+                    password.showSoftInputOnFocus = !showCustomKeyboard
+                }
+            }
+
+            fun go() {
                 model.tryParentLogin(
                         password = password.text.toString(),
                         keepSignedIn = checkDontAskAgain.isChecked,
@@ -102,6 +118,21 @@ class NewLoginFragment: DialogFragment() {
                         setAsDeviceUser = checkAssignMyself.isChecked
                 )
             }
+
+            keyboard.listener = object: KeyboardViewListener {
+                override fun onItemClicked(content: String) {
+                    val start = Math.max(password.selectionStart, 0)
+                    val end = Math.max(password.selectionEnd, 0)
+
+                    password.text.replace(Math.min(start, end), Math.max(start, end), content, 0, content.length)
+                }
+
+                override fun onGoClicked() {
+                    go()
+                }
+            }
+
+            password.setOnEnterListenr { go() }
         }
 
         binding.childPassword.apply {
@@ -134,8 +165,10 @@ class NewLoginFragment: DialogFragment() {
                         binding.switcher.displayedChild = PARENT_AUTH
                     }
 
+                    if (!binding.enterPassword.showCustomKeyboard) {
                         binding.enterPassword.password.requestFocus()
                         inputMethodManager.showSoftInput(binding.enterPassword.password, 0)
+                    }
 
                     binding.enterPassword.showKeepLoggedInOption = status.isConnectedMode
 

app/src/main/java/io/timelimit/android/ui/view/KeyboardView.kt

@@ -0,0 +1,82 @@
+/*
+ * TimeLimit Copyright <C> 2019 Jonas Lochmann
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation version 3 of the License.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <https://www.gnu.org/licenses/>.
+ */
+package io.timelimit.android.ui.view
+
+import android.content.Context
+import android.util.AttributeSet
+import android.view.LayoutInflater
+import android.widget.Button
+import android.widget.HorizontalScrollView
+import com.google.android.flexbox.FlexDirection
+import com.google.android.flexbox.FlexWrap
+import com.google.android.flexbox.FlexboxLayout
+import io.timelimit.android.R
+
+class KeyboardView(context: Context, attributeSet: AttributeSet): HorizontalScrollView(context, attributeSet) {
+    companion object {
+        private const val chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ 0123456789.,-"
+    }
+
+    var listener: KeyboardViewListener? = null
+
+    private val flexbox = FlexboxLayout(context)
+    private val inflater = LayoutInflater.from(context)
+
+    init {
+        flexbox.flexDirection = FlexDirection.COLUMN
+        flexbox.flexWrap = FlexWrap.WRAP
+
+        addView(flexbox)
+
+        chars.forEach { char ->
+            inflater.inflate(R.layout.keyboard_btn, flexbox, false).let { button ->
+                button as Button
+
+                button.apply {
+                    transformationMethod = null
+                    text = char.toString()
+                    minWidth = 0
+                    minHeight = 0
+
+                    setOnClickListener {
+                        listener?.onItemClicked(char.toString())
+                    }
+                }
+
+                flexbox.addView(button)
+            }
+        }
+
+        inflater.inflate(R.layout.keyboard_btn, flexbox, false).let { button ->
+            button as Button
+
+            button.apply {
+                setText(R.string.generic_go)
+
+                setOnClickListener {
+                    listener?.onGoClicked()
+                }
+            }
+
+            flexbox.addView(button)
+        }
+    }
+}
+
+interface KeyboardViewListener {
+    fun onItemClicked(content: String)
+    fun onGoClicked()
+}

app/src/main/res/drawable/ic_keyboard_black_24dp.xml

@@ -0,0 +1,9 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+        android:width="24dp"
+        android:height="24dp"
+        android:viewportWidth="24.0"
+        android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M20,5L4,5c-1.1,0 -1.99,0.9 -1.99,2L2,17c0,1.1 0.9,2 2,2h16c1.1,0 2,-0.9 2,-2L22,7c0,-1.1 -0.9,-2 -2,-2zM11,8h2v2h-2L11,8zM11,11h2v2h-2v-2zM8,8h2v2L8,10L8,8zM8,11h2v2L8,13v-2zM7,13L5,13v-2h2v2zM7,10L5,10L5,8h2v2zM16,17L8,17v-2h8v2zM16,13h-2v-2h2v2zM16,10h-2L14,8h2v2zM19,13h-2v-2h2v2zM19,10h-2L17,8h2v2z"/>
+</vector>

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

@@ -0,0 +1,19 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  TimeLimit Copyright <C> 2019 Jonas Lochmann
+  This program is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation version 3 of the License.
+
+  This program is distributed in the hope that it will be useful,
+  but WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+  GNU General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program. If not, see <https://www.gnu.org/licenses/>.
+-->
+<Button xmlns:android="http://schemas.android.com/apk/res/android"
+    style="?android:buttonStyleSmall"
+    android:layout_width="wrap_content"
+    android:layout_height="wrap_content" />

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

@@ -23,6 +23,10 @@
             name="canNotKeepLoggedIn"
             type="boolean" />
 
+         <variable
+            name="showCustomKeyboard"
+            type="boolean" />
+
         <import type="android.view.View" />
     </data>
 
@@ -60,11 +64,32 @@
             android:layout_width="match_parent"
             android:layout_height="wrap_content" />
 
+        <LinearLayout
+            android:orientation="horizontal"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content">
+
             <EditText
+                android:layout_weight="1"
                 android:imeOptions="actionGo"
                 android:inputType="textPassword"
                 android:id="@+id/password"
                 android:hint="@string/login_password_hint"
+                android:layout_width="0dp"
+                android:layout_height="wrap_content" />
+
+            <ImageButton
+                android:background="?selectableItemBackground"
+                android:id="@+id/show_keyboard_button"
+                android:src="@drawable/ic_keyboard_black_24dp"
+                android:layout_width="48dp"
+                android:layout_height="48dp" />
+
+        </LinearLayout>
+
+        <io.timelimit.android.ui.view.KeyboardView
+            android:visibility="@{showCustomKeyboard ? View.VISIBLE : View.GONE}"
+            android:id="@+id/keyboard"
             android:layout_width="match_parent"
             android:layout_height="wrap_content" />