feat: implement landscape immersive mode for editor toolbars

Adds LandscapeImmersiveController, touch observation, and UI toggles to handle auto-hiding toolbars.

Author: jatezzz

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

@@ -172,6 +172,7 @@ abstract class BaseEditorActivity :
 
 	private val fileManagerViewModel by viewModels<FileManagerViewModel>()
 	private var feedbackButtonManager: FeedbackButtonManager? = null
+	private var immersiveController: LandscapeImmersiveController? = null
 
 	var isDestroying = false
 		protected set
@@ -448,6 +449,9 @@ abstract class BaseEditorActivity :
 		editorBottomSheet = null
 		gestureDetector = null
 
+		immersiveController?.destroy()
+		immersiveController = null
+
 		_binding = null
 
 		if (isDestroying) {
@@ -480,11 +484,47 @@ abstract class BaseEditorActivity :
 		val imeInsets = insets.getInsets(WindowInsetsCompat.Type.ime())
 		val systemBars = insets.getInsets(WindowInsetsCompat.Type.systemBars())
 
-		_binding?.content?.editorAppBarLayout?.updatePadding(top = systemBars.top)
+		applyStandardInsets(systemBars, insets)
+
+		applyImmersiveModeInsets(systemBars)
+
+		handleKeyboardInsets(imeInsets)
+	}
+
+	private fun applyStandardInsets(systemBars: Insets, windowInsets: WindowInsetsCompat) {
+		val content = _binding?.content ?: return
+
+		val appBarContent = content.editorAppbarContent
+    if (appBarContent != null) {
+    	content.editorAppBarLayout.updatePadding(top = 0)
+    	appBarContent.updatePadding(top = systemBars.top)
+    } else {
+    	content.editorAppBarLayout.updatePadding(top = systemBars.top)
+    }
+
+		immersiveController?.onSystemBarInsetsChanged(systemBars.top)
 		applySidebarInsets(systemBars)
-		
-		_binding?.root?.applyBottomWindowInsetsPadding(insets)
+		_binding?.root?.applyBottomWindowInsetsPadding(windowInsets)
+	}
+
+	private fun applyImmersiveModeInsets(systemBars: Insets) {
+		val content = _binding?.content ?: return
+		val baseMargin = SizeUtils.dp2px(16f)
 
+		content.btnToggleTopBar.updateLayoutParams<ViewGroup.MarginLayoutParams> {
+			topMargin = baseMargin + systemBars.top
+			marginEnd = baseMargin + systemBars.right
+		}
+
+		content.btnToggleBottomBar.updateLayoutParams<ViewGroup.MarginLayoutParams> {
+			bottomMargin = baseMargin + systemBars.bottom
+			marginEnd = baseMargin + systemBars.right
+		}
+
+		content.bottomSheet.updatePadding(top = systemBars.top)
+	}
+
+	private fun handleKeyboardInsets(imeInsets: Insets) {
 		val isImeVisible = imeInsets.bottom > 0
 		_binding?.content?.bottomSheet?.setImeVisible(isImeVisible)
 
@@ -612,6 +652,15 @@ abstract class BaseEditorActivity :
 		setupStateObservers()
 		setupViews()
 
+		immersiveController = LandscapeImmersiveController(
+			contentBinding = content,
+			bottomSheetBehavior = editorBottomSheet!!,
+			coroutineScope = lifecycleScope,
+		).also {
+			it.bind()
+			it.onConfigurationChanged(resources.configuration)
+		}
+
 		setupContainers()
 		setupDiagnosticInfo()
 
@@ -643,6 +692,7 @@ abstract class BaseEditorActivity :
 
 	override fun onConfigurationChanged(newConfig: Configuration) {
 		super.onConfigurationChanged(newConfig)
+		immersiveController?.onConfigurationChanged(newConfig)
 	}
 
 	private fun setupToolbar() {
@@ -792,6 +842,7 @@ abstract class BaseEditorActivity :
 		}
 
 	override fun onPause() {
+		immersiveController?.onPause()
 		super.onPause()
 		memoryUsageWatcher.listener = null
 		memoryUsageWatcher.stopWatching(false)
@@ -1299,7 +1350,8 @@ abstract class BaseEditorActivity :
 					slideOffset: Float,
 				) {
 					content.apply {
-						val editorScale = 1 - slideOffset * (1 - EDITOR_CONTAINER_SCALE_FACTOR)
+						val safeOffset = slideOffset.coerceAtLeast(0f)
+						val editorScale = 1 - safeOffset * (1 - EDITOR_CONTAINER_SCALE_FACTOR)
 						this.bottomSheet.onSlide(slideOffset)
 						this.viewContainer.scaleX = editorScale
 						this.viewContainer.scaleY = editorScale