Detect double taps

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/messages/VisibleMessageContentView.kt

@@ -28,6 +28,7 @@ import kotlin.math.roundToInt
 
 class VisibleMessageContentView : LinearLayout {
     var onContentClick: (() -> Unit)? = null
+    var onContentDoubleTap: (() -> Unit)? = null
 
     // region Lifecycle
     constructor(context: Context) : super(context) { initialize() }
@@ -52,6 +53,7 @@ class VisibleMessageContentView : LinearLayout {
         // Body
         mainContainer.removeAllViews()
         onContentClick = null
+        onContentDoubleTap = null
         if (message is MmsMessageRecord && message.linkPreviews.isNotEmpty()) {
             val linkPreviewView = LinkPreviewView(context)
             linkPreviewView.bind(message, glide, isStartOfMessageCluster, isEndOfMessageCluster)
@@ -77,6 +79,7 @@ class VisibleMessageContentView : LinearLayout {
             // We have to use onContentClick (rather than a click listener directly on the voice
             // message view) so as to not interfere with all the other gestures.
             onContentClick = { voiceMessageView.togglePlayback() }
+            onContentDoubleTap = { voiceMessageView.handleDoubleTap() }
         } else if (message is MmsMessageRecord && message.slideDeck.documentSlide != null) {
             val documentView = DocumentView(context)
             documentView.bind(message, VisibleMessageContentView.getTextColor(context, message))

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/messages/VisibleMessageView.kt

@@ -9,6 +9,7 @@ import android.os.Build
 import android.os.Handler
 import android.os.Looper
 import android.util.AttributeSet
+import android.util.Log
 import android.view.*
 import android.widget.LinearLayout
 import androidx.core.content.ContextCompat
@@ -40,8 +41,10 @@ class VisibleMessageView : LinearLayout {
     private var dx = 0.0f
     private var previousTranslationX = 0.0f
     private val gestureHandler = Handler(Looper.getMainLooper())
+    private var pressCallback: Runnable? = null
     private var longPressCallback: Runnable? = null
     private var onDownTimestamp = 0L
+    private var onDoubleTap: (() -> Unit)? = null
     var snIsSelected = false
         set(value) { field = value; handleIsSelectedChanged()}
     var onPress: (() -> Unit)? = null
@@ -52,6 +55,7 @@ class VisibleMessageView : LinearLayout {
         const val swipeToReplyThreshold = 80.0f // dp
         const val longPressMovementTreshold = 10.0f // dp
         const val longPressDurationThreshold = 250L // ms
+        const val maxDoubleTapInterval = 200L
     }
 
     // region Lifecycle
@@ -137,6 +141,7 @@ class VisibleMessageView : LinearLayout {
         if (profilePictureContainer.visibility != View.GONE) { maxWidth -= profilePictureContainer.width }
         // Populate content view
         messageContentView.bind(message, isStartOfMessageCluster, isEndOfMessageCluster, glide, maxWidth, thread)
+        onDoubleTap = { messageContentView.onContentDoubleTap?.invoke() }
     }
 
     private fun setMessageSpacing(isStartOfMessageCluster: Boolean, isEndOfMessageCluster: Boolean) {
@@ -266,7 +271,18 @@ class VisibleMessageView : LinearLayout {
             onSwipeToReply?.invoke()
         } else if ((Date().time - onDownTimestamp) < VisibleMessageView.longPressDurationThreshold) {
             longPressCallback?.let { gestureHandler.removeCallbacks(it) }
-            onPress?.invoke()
+            val pressCallback = this.pressCallback
+            if (pressCallback != null) {
+                // If we're here and pressCallback isn't null, it means that we tapped again within
+                // maxDoubleTapInterval ms and we should count this as a double tap
+                gestureHandler.removeCallbacks(pressCallback)
+                this.pressCallback = null
+                onDoubleTap?.invoke()
+            } else {
+                val newPressCallback = Runnable { onPress() }
+                this.pressCallback = newPressCallback
+                gestureHandler.postDelayed(newPressCallback, VisibleMessageView.maxDoubleTapInterval)
+            }
         }
         resetPosition()
     }
@@ -291,6 +307,11 @@ class VisibleMessageView : LinearLayout {
         onLongPress?.invoke()
     }
 
+    private fun onPress() {
+        onPress?.invoke()
+        pressCallback = null
+    }
+
     fun onContentClick() {
         messageContentView.onContentClick?.invoke()
     }

app/src/main/java/org/thoughtcrime/securesms/conversation/v2/messages/VoiceMessageView.kt

@@ -2,24 +2,18 @@ package org.thoughtcrime.securesms.conversation.v2.messages
 
 import android.content.Context
 import android.graphics.Canvas
-import android.graphics.drawable.Drawable
-import android.os.Handler
-import android.os.Looper
 import android.util.AttributeSet
-import android.view.LayoutInflater
-import android.view.ViewOutlineProvider
+import android.util.Log
+import android.view.*
 import android.widget.LinearLayout
 import android.widget.RelativeLayout
 import androidx.core.view.isVisible
 import kotlinx.android.synthetic.main.view_voice_message.view.*
 import network.loki.messenger.R
-import org.session.libsession.messaging.sending_receiving.attachments.DatabaseAttachment
 import org.thoughtcrime.securesms.audio.AudioSlidePlayer
 import org.thoughtcrime.securesms.components.CornerMask
 import org.thoughtcrime.securesms.conversation.v2.utilities.MessageBubbleUtilities
-import org.thoughtcrime.securesms.database.DatabaseFactory
 import org.thoughtcrime.securesms.database.model.MmsMessageRecord
-import org.thoughtcrime.securesms.mms.AudioSlide
 import java.util.concurrent.TimeUnit
 import kotlin.math.roundToInt
 import kotlin.math.roundToLong
@@ -109,5 +103,9 @@ class VoiceMessageView : LinearLayout, AudioSlidePlayer.Listener {
             player.stop()
         }
     }
+
+    fun handleDoubleTap() {
+        Log.d("Test", "handleDoubleTap()")
+    }
     // endregion
 }