Swipe Down support on Media files

app/src/main/java/com/nextcloud/talk/fullscreenfile/FullScreenGestureListener.kt

@@ -0,0 +1,42 @@
+/*
+ * Nextcloud Talk - Android Client
+ *
+ * SPDX-FileCopyrightText: 2025 Julius Linus <juliuslinus1@gmail.com>
+ * SPDX-License-Identifier: GPL-3.0-or-later
+ */
+
+package com.nextcloud.talk.fullscreenfile
+
+import android.content.Context
+import android.view.GestureDetector
+import android.view.MotionEvent
+import android.view.ViewConfiguration
+import kotlin.math.abs
+
+class FullScreenGestureListener(val context: Context, val callback: () -> Unit) :
+    GestureDetector.SimpleOnGestureListener() {
+
+    private val viewConfig = ViewConfiguration.get(context)
+    private val minSwipeDistance = viewConfig.scaledTouchSlop
+    private val minSwipeVelocity = viewConfig.scaledMinimumFlingVelocity
+
+    override fun onDown(event: MotionEvent): Boolean = true
+
+    override fun onFling(e1: MotionEvent?, e2: MotionEvent, velocityX: Float, velocityY: Float): Boolean {
+        // Safety check for null start event
+        if (e1 == null) return false
+
+        val deltaX = e2.x - e1.x
+        val deltaY = e2.y - e1.y
+
+        if (abs(deltaY) > abs(deltaX)) { // Intended vertical swipe
+
+            if (deltaY > minSwipeDistance && abs(velocityY) > minSwipeVelocity) {
+                callback()
+                return true
+            }
+        }
+
+        return false
+    }
+}

app/src/main/java/com/nextcloud/talk/fullscreenfile/FullScreenImageActivity.kt

@@ -9,9 +9,11 @@
  */
 package com.nextcloud.talk.fullscreenfile
 
+import android.annotation.SuppressLint
 import android.content.Intent
 import android.os.Bundle
 import android.util.Log
+import android.view.GestureDetector
 import android.view.Menu
 import android.view.MenuItem
 import android.view.View
@@ -43,6 +45,7 @@ class FullScreenImageActivity : AppCompatActivity() {
     private lateinit var windowInsetsController: WindowInsetsControllerCompat
     private lateinit var path: String
     private var showFullscreen = false
+    private lateinit var gestureDetector: GestureDetector
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
         menuInflater.inflate(R.menu.menu_preview, menu)
@@ -90,6 +93,7 @@ class FullScreenImageActivity : AppCompatActivity() {
             }
         }
 
+    @SuppressLint("ClickableViewAccessibility")
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         NextcloudTalkApplication.sharedApplication!!.componentApplication.inject(this)
@@ -107,10 +111,23 @@ class FullScreenImageActivity : AppCompatActivity() {
         binding.photoView.setOnOutsidePhotoTapListener {
             toggleFullscreen()
         }
+
         binding.gifView.setOnClickListener {
             toggleFullscreen()
         }
 
+        binding.photoView.setOnTouchListener { _, p1 ->
+            p1?.let {
+                gestureDetector.onTouchEvent(it)
+            } ?: false
+        }
+
+        binding.gifView.setOnTouchListener { _, p1 ->
+            p1?.let {
+                gestureDetector.onTouchEvent(it)
+            } ?: false
+        }
+
         // Enable enlarging the image more than default 3x maximumScale.
         // Medium scale adapted to make double-tap behaviour more consistent.
         binding.photoView.maximumScale = MAX_SCALE
@@ -133,6 +150,13 @@ class FullScreenImageActivity : AppCompatActivity() {
             binding.photoView.visibility = View.VISIBLE
             displayImage(path)
         }
+
+        gestureDetector = GestureDetector(
+            this,
+            FullScreenGestureListener(this) {
+                onBackPressedDispatcher.onBackPressed()
+            }
+        )
     }
 
     private fun displayImage(path: String) {

app/src/main/java/com/nextcloud/talk/fullscreenfile/FullScreenMediaActivity.kt

@@ -9,8 +9,10 @@
  */
 package com.nextcloud.talk.fullscreenfile
 
+import android.annotation.SuppressLint
 import android.content.Intent
 import android.os.Bundle
+import android.view.GestureDetector
 import android.view.Menu
 import android.view.MenuItem
 import android.view.ViewGroup.MarginLayoutParams
@@ -52,6 +54,7 @@ class FullScreenMediaActivity : AppCompatActivity() {
     private var playWhenReadyState: Boolean = true
     private var playBackPosition: Long = 0L
     private lateinit var windowInsetsController: WindowInsetsControllerCompat
+    private lateinit var gestureDetector: GestureDetector
 
     override fun onCreateOptionsMenu(menu: Menu): Boolean {
         menuInflater.inflate(R.menu.menu_preview, menu)
@@ -99,6 +102,7 @@ class FullScreenMediaActivity : AppCompatActivity() {
             }
         }
 
+    @SuppressLint("ClickableViewAccessibility")
     @OptIn(UnstableApi::class)
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
@@ -122,6 +126,12 @@ class FullScreenMediaActivity : AppCompatActivity() {
             binding.playerView.controllerShowTimeoutMs = 0
         }
 
+        binding.playerView.setOnTouchListener { _, p1 ->
+            p1?.let {
+                gestureDetector.onTouchEvent(it)
+            } ?: false
+        }
+
         initWindowInsetsController()
         applyWindowInsets()
 
@@ -134,6 +144,13 @@ class FullScreenMediaActivity : AppCompatActivity() {
                 }
             }
         )
+
+        gestureDetector = GestureDetector(
+            this,
+            FullScreenGestureListener(this) {
+                onBackPressedDispatcher.onBackPressed()
+            }
+        )
     }
 
     override fun onStart() {