Implement QR code screen redesign

AndroidManifest.xml

@@ -153,6 +153,9 @@
         <activity
             android:name="org.thoughtcrime.securesms.loki.redesign.activities.SettingsActivity"
             android:launchMode="singleTask" />
+        <activity
+            android:name="org.thoughtcrime.securesms.loki.redesign.activities.QRCodeActivity"
+            android:launchMode="singleTask" />
         <!-- Session -->
         <activity android:name="org.thoughtcrime.securesms.loki.LinkedDevicesActivity" />
         <activity

res/layout/activity_qr_code.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<android.support.v4.view.ViewPager
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/viewPager"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent" >
+
+    <android.support.design.widget.TabLayout
+        style="@style/Session.DarkTabLayout"
+        android:id="@+id/tabLayout"
+        android:layout_width="match_parent"
+        android:layout_height="@dimen/tab_bar_height" />
+
+</android.support.v4.view.ViewPager>

res/layout/activity_settings.xml

@@ -115,6 +115,22 @@
             android:layout_height="1px"
             android:background="@color/separator" />
 
+        <TextView
+            android:id="@+id/chatsButton"
+            android:layout_width="match_parent"
+            android:layout_height="@dimen/setting_button_height"
+            android:background="@drawable/setting_button_background"
+            android:textColor="@color/text"
+            android:textSize="@dimen/medium_font_size"
+            android:textStyle="bold"
+            android:gravity="center"
+            android:text="Chats" />
+
+        <View
+            android:layout_width="match_parent"
+            android:layout_height="1px"
+            android:background="@color/separator" />
+
         <TextView
             android:id="@+id/linkedDevicesButton"
             android:layout_width="match_parent"

res/layout/fragment_view_my_qr_code.xml

@@ -0,0 +1,74 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@drawable/default_session_background" >
+
+    <ScrollView
+        android:layout_width="match_parent"
+        android:layout_height="wrap_content"
+        android:scrollbars="none">
+
+        <LinearLayout
+            android:id="@+id/contentView"
+            android:layout_width="match_parent"
+            android:layout_height="wrap_content"
+            android:orientation="vertical">
+
+            <TextView
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginLeft="@dimen/very_large_spacing"
+                android:layout_marginTop="@dimen/medium_spacing"
+                android:layout_marginRight="@dimen/very_large_spacing"
+                android:textSize="@dimen/massive_font_size"
+                android:textColor="@color/text"
+                android:textStyle="bold"
+                android:textAlignment="center"
+                android:text="Scan Me" />
+
+            <RelativeLayout
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginLeft="@dimen/very_large_spacing"
+                android:layout_marginTop="@dimen/small_spacing"
+                android:layout_marginRight="@dimen/very_large_spacing"
+                android:gravity="center">
+
+                <ImageView
+                    android:id="@+id/qrCodeImageView"
+                    android:layout_width="320dp"
+                    android:layout_height="320dp" />
+
+            </RelativeLayout>
+
+            <TextView
+                android:id="@+id/explanationTextView"
+                android:layout_width="match_parent"
+                android:layout_height="wrap_content"
+                android:layout_marginLeft="@dimen/very_large_spacing"
+                android:layout_marginTop="20dp"
+                android:layout_marginRight="@dimen/very_large_spacing"
+                android:textSize="@dimen/medium_font_size"
+                android:textColor="@color/text"
+                android:fontFamily="@font/space_mono_regular"
+                android:textAlignment="center"
+                android:text="This is your unique public QR code. Other users may scan this in order to begin a conversation with you." />
+
+            <Button
+                style="@style/MediumUnimportantOutlineButton"
+                android:id="@+id/shareButton"
+                android:layout_width="match_parent"
+                android:layout_height="@dimen/medium_button_height"
+                android:layout_marginLeft="90dp"
+                android:layout_marginTop="28dp"
+                android:layout_marginRight="90dp"
+                android:layout_marginBottom="@dimen/medium_spacing"
+                android:text="Share" />
+
+        </LinearLayout>
+
+    </ScrollView>
+
+</RelativeLayout>

src/org/thoughtcrime/securesms/loki/redesign/activities/QRCodeActivity.kt

@@ -0,0 +1,131 @@
+package org.thoughtcrime.securesms.loki.redesign.activities
+
+import android.content.Intent
+import android.graphics.Typeface
+import android.os.Bundle
+import android.support.v4.app.Fragment
+import android.support.v4.app.FragmentPagerAdapter
+import android.text.Spannable
+import android.text.SpannableStringBuilder
+import android.text.style.StyleSpan
+import android.view.LayoutInflater
+import android.view.View
+import android.view.ViewGroup
+import android.widget.Toast
+import kotlinx.android.synthetic.main.activity_qr_code.*
+import kotlinx.android.synthetic.main.fragment_view_my_qr_code.*
+import network.loki.messenger.R
+import org.thoughtcrime.securesms.PassphraseRequiredActionBarActivity
+import org.thoughtcrime.securesms.conversation.ConversationActivity
+import org.thoughtcrime.securesms.database.Address
+import org.thoughtcrime.securesms.database.DatabaseFactory
+import org.thoughtcrime.securesms.database.ThreadDatabase
+import org.thoughtcrime.securesms.loki.redesign.fragments.ScanQRCodeWrapperFragment
+import org.thoughtcrime.securesms.loki.redesign.fragments.ScanQRCodeWrapperFragmentDelegate
+import org.thoughtcrime.securesms.loki.redesign.utilities.QRCodeUtilities
+import org.thoughtcrime.securesms.loki.toPx
+import org.thoughtcrime.securesms.recipients.Recipient
+import org.thoughtcrime.securesms.util.TextSecurePreferences
+import org.whispersystems.signalservice.loki.utilities.PublicKeyValidation
+
+
+class QRCodeActivity : PassphraseRequiredActionBarActivity(), ScanQRCodeWrapperFragmentDelegate {
+    private val adapter = QRCodeActivityAdapter(this)
+
+    // region Lifecycle
+    override fun onCreate(savedInstanceState: Bundle?, isReady: Boolean) {
+        super.onCreate(savedInstanceState, isReady)
+        // Set content view
+        setContentView(R.layout.activity_qr_code)
+        // Set title
+        supportActionBar!!.title = "QR Code"
+        // Set up view pager
+        viewPager.adapter = adapter
+        tabLayout.setupWithViewPager(viewPager)
+    }
+    // endregion
+
+    // region Interaction
+    override fun handleQRCodeScanned(hexEncodedPublicKey: String) {
+        createPrivateChatIfPossible(hexEncodedPublicKey)
+    }
+
+    fun createPrivateChatIfPossible(hexEncodedPublicKey: String) {
+        if (!PublicKeyValidation.isValid(hexEncodedPublicKey)) { return Toast.makeText(this, "Invalid Session ID", Toast.LENGTH_SHORT).show() }
+        val masterHexEncodedPublicKey = TextSecurePreferences.getMasterHexEncodedPublicKey(this)
+        val userHexEncodedPublicKey = TextSecurePreferences.getLocalNumber(this)
+        val targetHexEncodedPublicKey = if (hexEncodedPublicKey == masterHexEncodedPublicKey) userHexEncodedPublicKey else hexEncodedPublicKey
+        val recipient = Recipient.from(this, Address.fromSerialized(targetHexEncodedPublicKey), true)
+        val intent = Intent(this, ConversationActivity::class.java)
+        intent.putExtra(ConversationActivity.ADDRESS_EXTRA, recipient.address)
+        intent.putExtra(ConversationActivity.TEXT_EXTRA, getIntent().getStringExtra(ConversationActivity.TEXT_EXTRA))
+        intent.setDataAndType(getIntent().data, getIntent().type)
+        val existingThread = DatabaseFactory.getThreadDatabase(this).getThreadIdIfExistsFor(recipient)
+        intent.putExtra(ConversationActivity.THREAD_ID_EXTRA, existingThread)
+        intent.putExtra(ConversationActivity.DISTRIBUTION_TYPE_EXTRA, ThreadDatabase.DistributionTypes.DEFAULT)
+        startActivity(intent)
+        finish()
+    }
+    // endregion
+}
+
+// region Adapter
+private class QRCodeActivityAdapter(val activity: QRCodeActivity) : FragmentPagerAdapter(activity.supportFragmentManager) {
+
+    override fun getCount(): Int {
+        return 2
+    }
+
+    override fun getItem(index: Int): Fragment {
+        return when (index) {
+            0 -> ViewMyQRCodeFragment()
+            1 -> {
+                val result = ScanQRCodeWrapperFragment()
+                result.delegate = activity
+                result.message = "Scan someone\'s QR code to start a conversation with them"
+                result
+            }
+            else -> throw IllegalStateException()
+        }
+    }
+
+    override fun getPageTitle(index: Int): CharSequence? {
+        return when (index) {
+            0 -> "View My QR Code"
+            1 -> "Scan QR Code"
+            else -> throw IllegalStateException()
+        }
+    }
+}
+// endregion
+
+// region View My QR Code Fragment
+class ViewMyQRCodeFragment : Fragment() {
+
+    private val hexEncodedPublicKey: String
+        get() {
+            val masterHexEncodedPublicKey = TextSecurePreferences.getMasterHexEncodedPublicKey(context!!)
+            val userHexEncodedPublicKey = TextSecurePreferences.getLocalNumber(context!!)
+            return masterHexEncodedPublicKey ?: userHexEncodedPublicKey
+        }
+
+    override fun onCreateView(inflater: LayoutInflater, container: ViewGroup?, savedInstanceState: Bundle?): View {
+        return inflater.inflate(R.layout.fragment_view_my_qr_code, container, false)
+    }
+
+    override fun onViewCreated(view: View, savedInstanceState: Bundle?) {
+        super.onViewCreated(view, savedInstanceState)
+        val size = toPx(240, resources)
+        val qrCode = QRCodeUtilities.encode(hexEncodedPublicKey, size)
+        qrCodeImageView.setImageBitmap(qrCode)
+        val explanation = SpannableStringBuilder("This is your unique public QR code. Other users may scan this in order to begin a conversation with you.")
+        explanation.setSpan(StyleSpan(Typeface.BOLD), 8, 34, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE)
+        explanationTextView.text = explanation
+        shareButton.setOnClickListener { shareQRCode() }
+    }
+
+    private fun shareQRCode() {
+        // TODO: Implement
+    }
+}
+// endregion

src/org/thoughtcrime/securesms/loki/redesign/activities/SettingsActivity.kt

@@ -12,6 +12,7 @@ import kotlinx.android.synthetic.main.activity_settings.*
 import network.loki.messenger.R
 import org.thoughtcrime.securesms.PassphraseRequiredActionBarActivity
 import org.thoughtcrime.securesms.database.DatabaseFactory
+import org.thoughtcrime.securesms.loki.redesign.utilities.push
 import org.thoughtcrime.securesms.mms.GlideApp
 import org.thoughtcrime.securesms.mms.GlideRequests
 import org.thoughtcrime.securesms.util.TextSecurePreferences
@@ -67,7 +68,8 @@ class SettingsActivity : PassphraseRequiredActionBarActivity() {
     }
 
     private fun showQRCode() {
-        // TODO: Implement
+        val intent = Intent(this, QRCodeActivity::class.java)
+        push(intent)
     }
 
     private fun copyPublicKey() {

src/org/thoughtcrime/securesms/loki/redesign/fragments/ScanQRCodeFragmentV2.kt

@@ -35,7 +35,11 @@ class ScanQRCodeFragmentV2 : Fragment() {
         super.onResume()
         cameraView.onResume()
         cameraView.setPreviewCallback(scanningThread)
-        scanningThread.start()
+        try {
+            scanningThread.start()
+        } catch (exception: Exception) {
+            // Do nothing
+        }
         scanningThread.setScanListener(scanListener)
     }
 

src/org/thoughtcrime/securesms/loki/redesign/utilities/QRCodeUtilities.kt

@@ -0,0 +1,31 @@
+package org.thoughtcrime.securesms.loki.redesign.utilities
+
+import android.graphics.Bitmap
+import android.graphics.Color
+import com.google.zxing.BarcodeFormat
+import com.google.zxing.EncodeHintType
+import com.google.zxing.WriterException
+import com.google.zxing.qrcode.QRCodeWriter
+
+object QRCodeUtilities {
+
+    fun encode(data: String, size: Int, hasTransparentBackground: Boolean = true): Bitmap {
+        try {
+            val hints = hashMapOf( EncodeHintType.MARGIN to 1 )
+            val result = QRCodeWriter().encode(data, BarcodeFormat.QR_CODE, size, size, hints)
+            val bitmap = Bitmap.createBitmap(result.width, result.height, Bitmap.Config.ARGB_8888)
+            for (y in 0 until result.height) {
+                for (x in 0 until result.width) {
+                    if (result.get(x, y)) {
+                        bitmap.setPixel(x, y, Color.WHITE)
+                    } else if (!hasTransparentBackground) {
+                        bitmap.setPixel(x, y, Color.BLACK)
+                    }
+                }
+            }
+            return bitmap
+        } catch (e: WriterException) {
+            return Bitmap.createBitmap(512, 512, Bitmap.Config.ARGB_8888)
+        }
+    }
+}

src/org/thoughtcrime/securesms/loki/redesign/views/ProfilePictureView.kt

@@ -15,7 +15,7 @@ import org.thoughtcrime.securesms.loki.JazzIdenticonDrawable
 import org.thoughtcrime.securesms.mms.GlideRequests
 import org.thoughtcrime.securesms.recipients.Recipient
 
-// TODO: Look into a better way of handling different sizes
+// TODO: Look into a better way of handling different sizes. Maybe an enum (with associated values) encapsulating the different modes?
 
 class ProfilePictureView : RelativeLayout {
     lateinit var glide: GlideRequests