Show delete button when long pressing a slide

stories/src/main/java/com/wordpress/stories/compose/ComposeLoopFrameActivity.kt

@@ -1900,6 +1900,23 @@ abstract class ComposeLoopFrameActivity : AppCompatActivity(), OnStoryFrameSelec
     }
 
     override fun onCurrentFrameTapped() {
+        toggleDeleteSlideMode()
+    }
+
+    override fun onStoryFrameLongPressed(oldIndex: Int, newIndex: Int) {
+        // On long press we want to switch to that frame and show the delete slide move all together.
+        if (oldIndex != newIndex) {
+            // The long-pressed frame was not the one already in focus - switch to it first.
+            onStoryFrameSelected(oldIndex, newIndex)
+        }
+        toggleDeleteSlideMode()
+    }
+
+    override fun onStoryFrameMovedLongPressed() {
+        disableDeleteSlideMode()
+    }
+
+    private fun toggleDeleteSlideMode() {
         if (delete_slide_view.visibility == View.VISIBLE) {
             disableDeleteSlideMode()
         } else {

stories/src/main/java/com/wordpress/stories/compose/story/StoryFrameSelectorAdapter.kt

@@ -80,15 +80,21 @@ class StoryFrameSelectorAdapter : RecyclerView.Adapter<StoryFrameSelectorAdapter
 
         class StoryFrameHolderItem(v: View) : StoryFrameHolder(v) {
             private var onFrameSelected: (() -> Unit)? = null
+            private var onFrameLongPressed: (() -> Unit)? = null
 
             init {
                 clickableView.setOnClickListener {
                     onFrameSelected?.invoke()
                 }
+                clickableView.setOnLongClickListener {
+                    onFrameLongPressed?.invoke()
+                    true
+                }
             }
 
             override fun onBind(uiState: StoryFrameListItemUiState) {
                 onFrameSelected = requireNotNull(uiState.onItemTapped) { "OnItemTapped is required." }
+                onFrameLongPressed = requireNotNull(uiState.onItemLongPressed) { "OnItemLongPressed is required." }
                 uiState as StoryFrameListItemUiStateFrame
 
                 val loadThumbnailImage = {

stories/src/main/java/com/wordpress/stories/compose/story/StoryFrameSelectorFragment.kt

@@ -24,6 +24,8 @@ interface OnStoryFrameSelectorTappedListener {
     fun onStoryFrameSelected(oldIndex: Int, newIndex: Int)
     fun onStoryFrameAddTapped()
     fun onCurrentFrameTapped()
+    fun onStoryFrameLongPressed(oldIndex: Int, newIndex: Int)
+    fun onStoryFrameMovedLongPressed()
 }
 
 class StoryFrameSelectorFragment : Fragment() {
@@ -51,6 +53,15 @@ class StoryFrameSelectorFragment : Fragment() {
             storyFrameTappedListener?.onCurrentFrameTapped()
         })
 
+        storyViewModel.onUserLongPressedFrame.observe(this, Observer { selectedFrameIndexChange ->
+            storyFrameTappedListener?.onStoryFrameLongPressed(
+                    selectedFrameIndexChange.first, selectedFrameIndexChange.second)
+        })
+
+        storyViewModel.onUserMovedLongPressedFrame.observe(this, Observer {
+            storyFrameTappedListener?.onStoryFrameMovedLongPressed()
+        })
+
         storyViewModel.onFrameIndexMoved.observe(this, Observer<Pair<Int, Int>> { positionFrameIndexChange ->
             updateContentUiStateMovedIndex(positionFrameIndexChange.first, positionFrameIndexChange.second)
         })

stories/src/main/java/com/wordpress/stories/compose/story/StoryViewModel.kt

@@ -47,6 +47,12 @@ class StoryViewModel(private val repository: StoryRepository, val storyIndex: St
     private val _onUserTappedCurrentFrame = SingleLiveEvent<Unit>()
     val onUserTappedCurrentFrame = _onUserTappedCurrentFrame
 
+    private val _onUserLongPressedFrame = SingleLiveEvent<Pair<Int, Int>>()
+    val onUserLongPressedFrame = _onUserLongPressedFrame
+
+    private val _onUserMovedLongPressedFrame = SingleLiveEvent<Unit>()
+    val onUserMovedLongPressedFrame = _onUserMovedLongPressedFrame
+
     fun createNewStory() {
         loadStory(StoryRepository.DEFAULT_NONE_SELECTED)
     }
@@ -104,6 +110,16 @@ class StoryViewModel(private val repository: StoryRepository, val storyIndex: St
         }
     }
 
+    private fun setLongPressedFrame(index: Int) {
+        val oldIndex = currentSelectedFrameIndex
+        setSelectedFrame(index)
+        _onUserLongPressedFrame.value = Pair(oldIndex, index)
+    }
+
+    private fun setMovedLongPressedFrame() {
+        _onUserMovedLongPressedFrame.call()
+    }
+
     fun updateCurrentSelectedFrameOnRetryResult(frameSaveResult: FrameSaveResult) {
         repository.updateCurrentStorySaveResultOnFrame(
             currentSelectedFrameIndex,
@@ -212,6 +228,7 @@ class StoryViewModel(private val repository: StoryRepository, val storyIndex: St
     }
 
     fun swapItemsInPositions(pos1: Int, pos2: Int) {
+        setMovedLongPressedFrame()
         repository.swapItemsInPositions(pos1, pos2)
         // adjust currentSelectedFrameIndex so it reflects the movement only
         // if the movement occurred entierly to the left of the selection, don't update it
@@ -291,6 +308,9 @@ class StoryViewModel(private val repository: StoryRepository, val storyIndex: St
             oneFrameUiState.onItemTapped = {
                 setSelectedFrameByUser(index, userInitiated = true)
             }
+            oneFrameUiState.onItemLongPressed = {
+                setLongPressedFrame(index)
+            }
             uiStateItems.add(oneFrameUiState)
         }
         return newUiState
@@ -300,6 +320,7 @@ class StoryViewModel(private val repository: StoryRepository, val storyIndex: St
 
     sealed class StoryFrameListItemUiState() {
         var onItemTapped: (() -> Unit)? = null
+        var onItemLongPressed: (() -> Unit)? = null
 
         data class StoryFrameListItemUiStateFrame(
             var selected: Boolean = false,