ADFA-3569 | Refactor editor fullscreen state handling

app/src/main/java/com/itsaky/androidide/activities/editor/BaseEditorActivity.kt

@@ -177,7 +177,7 @@ abstract class BaseEditorActivity :
 
 	private val fileManagerViewModel by viewModels<FileManagerViewModel>()
 	private var feedbackButtonManager: FeedbackButtonManager? = null
-	private var immersiveController: LandscapeImmersiveController? = null
+	private var fullscreenManager: FullscreenManager? = null
 	private val topEdgeThreshold by lazy { SizeUtils.dp2px(TOP_EDGE_SWIPE_THRESHOLD_DP) }
 
 	var isDestroying = false
@@ -455,8 +455,8 @@ abstract class BaseEditorActivity :
  editorBottomSheet = null
  gestureDetector = null
 
-immersiveController?.destroy()
-immersiveController = null
+fullscreenManager?.destroy()
+fullscreenManager = null
 
  _binding = null
 
@@ -498,7 +498,6 @@ abstract class BaseEditorActivity :
 	}
 
 	private fun applyStandardInsets(systemBars: Insets) {
- immersiveController?.onSystemBarInsetsChanged(systemBars.top)
  val root = _binding?.root ?: return
  val initial = root.getOrStoreInitialPadding()
  root.updatePadding(bottom = initial.bottom + systemBars.bottom)
@@ -627,14 +626,21 @@ abstract class BaseEditorActivity :
  content.tabs.addOnTabSelectedListener(this)
 
  setupStateObservers()
+ setupFullscreenObserver()
  setupViews()
 
-immersiveController = LandscapeImmersiveController(
+fullscreenManager = FullscreenManager(
  contentBinding = content,
  bottomSheetBehavior = editorBottomSheet!!,
+ closeDrawerAction = {
+ binding.editorDrawerLayout.closeDrawer(GravityCompat.START)
+ },
+ onFullscreenToggleRequested = {
+ editorViewModel.toggleFullscreen()
+ },
  ).also {
  it.bind()
- it.onConfigurationChanged(resources.configuration)
+ it.render(editorViewModel.isFullscreen, animate = false)
  }
 
  setupContainers()
@@ -668,16 +674,17 @@ abstract class BaseEditorActivity :
 
 	override fun onConfigurationChanged(newConfig: Configuration) {
  super.onConfigurationChanged(newConfig)
- immersiveController?.onConfigurationChanged(newConfig)
  window?.decorView?.let { ViewCompat.requestApplyInsets(it) }
  reapplySystemBarInsetsFromRoot()
  _binding?.content?.applyBottomSheetAnchorForOrientation(newConfig.orientation)
+ fullscreenManager?.render(editorViewModel.isFullscreen, animate = false)
 	}
 
 	private fun reapplySystemBarInsetsFromRoot() {
  val root = _binding?.root ?: return
  val rootInsets = ViewCompat.getRootWindowInsets(root)
  if (rootInsets == null) {
+ // Insets can be temporarily unavailable right after a configuration change.
  root.post { reapplySystemBarInsetsFromRoot() }
  return
  }
@@ -844,7 +851,6 @@ abstract class BaseEditorActivity :
  }
 
 	override fun onPause() {
- immersiveController?.onPause()
  super.onPause()
  memoryUsageWatcher.listener = null
  memoryUsageWatcher.stopWatching(false)
@@ -1223,6 +1229,16 @@ abstract class BaseEditorActivity :
  }
 	}
 
+	private fun setupFullscreenObserver() {
+ lifecycleScope.launch {
+ repeatOnLifecycle(Lifecycle.State.STARTED) {
+ editorViewModel.uiState.collectLatest { uiState ->
+ fullscreenManager?.render(uiState.isFullscreen, animate = true)
+ }
+ }
+ }
+	}
+
 	private fun setupViews() {
  setupNoEditorView()
  setupBottomSheet()
@@ -1383,7 +1399,7 @@ abstract class BaseEditorActivity :
 
  content.apply {
  viewContainer.viewTreeObserver.addOnGlobalLayoutListener(observer)
-bottomSheet.setOffsetAnchor(editorAppBarLayout)
+applyBottomSheetAnchorForOrientation(resources.configuration.orientation)
  }
 	}
 
@@ -1447,31 +1463,48 @@ abstract class BaseEditorActivity :
  val isHorizontalSwipe = abs(diffX) > abs(diffY)
 
  val hasDownFlingDistance = diffY > flingDistanceThreshold
- val hasRightFlingDistance = diffX > flingDistanceThreshold
+ val hasUpFlingDistance = diffY < -flingDistanceThreshold
 
  val hasVerticalVelocity = abs(velocityY) > flingVelocityThreshold
  val hasHorizontalVelocity = abs(velocityX) > flingVelocityThreshold
+ val hasRightFlingDistance = diffX > flingDistanceThreshold
+
+ val screenHeight = resources.displayMetrics.heightPixels
+ val bottomEdgeThreshold = screenHeight - topEdgeThreshold
 
- // Check for a swipe down (to show top bar)
- // This is placed before the noFilesOpen check so it works while editing
- val isLandscape = resources.configuration.orientation == Configuration.ORIENTATION_LANDSCAPE
  val startedNearTopEdge = e1.y < topEdgeThreshold
+ val startedNearBottomEdge = e1.y > bottomEdgeThreshold
+ val isTopEdgeDismissFling = isVerticalSwipe &&
+ hasVerticalVelocity &&
+ startedNearTopEdge &&
+ hasDownFlingDistance
+ val isBottomEdgeDismissFling = isVerticalSwipe &&
+ hasVerticalVelocity &&
+ startedNearBottomEdge &&
+ hasUpFlingDistance
+ val isDrawerOpenFling = hasRightFlingDistance &&
+ hasHorizontalVelocity &&
+ isHorizontalSwipe
+
+ // Fullscreen mode can be dismissed with an inward fling from either vertical edge.
+ if (isTopEdgeDismissFling && editorViewModel.isFullscreen) {
+ editorViewModel.exitFullscreen()
+ return true
+ }
 
- if (isLandscape && startedNearTopEdge && hasDownFlingDistance && hasVerticalVelocity && isVerticalSwipe) {
-immersiveController?.showTopBar()
+ if (isBottomEdgeDismissFling && editorViewModel.isFullscreen) {
+editorViewModel.exitFullscreen()
  return true
  }
 
- // Check if no files are open by looking at the displayedChild of the view flipper
+ // Preserve the editor interaction area; drawer gestures are only enabled on the empty state.
  val noFilesOpen = content.viewContainer.displayedChild == 1
  if (!noFilesOpen) {
-	return false // If files are open, do nothing
+ return false
  }
 
- // Check for a right swipe (to open left drawer) - This part is still correct
- // Added abs(diffX) > abs(diffY) to prevent diagonal swipes from triggering this
- if (hasRightFlingDistance && hasHorizontalVelocity && isHorizontalSwipe) {
- // Use the correct binding for the drawer layout
+ // Filter out diagonal flings so only an intentional right swipe opens the drawer.
+ if (isDrawerOpenFling) {
  binding.editorDrawerLayout.openDrawer(GravityCompat.START)
  return true
  }