Refactor details title expansion

app/src/main/kotlin/org/koitharu/kotatsu/core/ui/widgets/SelectableTextView.kt

@@ -23,11 +23,16 @@ class SelectableTextView @JvmOverloads constructor(
 	private fun fixSelectionRange() {
 		if (selectionStart < 0 || selectionEnd < 0) {
 			val spannableText = text as? Spannable ?: return
-			Selection.setSelection(spannableText, text.length)
+			Selection.setSelection(spannableText, spannableText.length)
 		}
 	}
 
 	override fun scrollTo(x: Int, y: Int) {
 		super.scrollTo(0, 0)
 	}
+
+	fun selectAll() {
+		val spannableText = text as? Spannable ?: return
+		Selection.selectAll(spannableText)
+	}
 }

app/src/main/kotlin/org/koitharu/kotatsu/details/ui/DetailsActivity.kt

@@ -3,11 +3,6 @@ package org.koitharu.kotatsu.details.ui
 import android.content.Context
 import android.content.Intent
 import android.graphics.Color
-import android.view.MotionEvent
-import android.content.ClipData
-import android.content.ClipboardManager
-import android.view.GestureDetector
-import android.view.ViewGroup
 import android.os.Bundle
 import android.text.style.DynamicDrawableSpan
 import android.text.style.ForegroundColorSpan
@@ -128,7 +123,6 @@ class DetailsActivity :
 	lateinit var tagHighlighter: ListExtraProvider
 
 	private val viewModel: DetailsViewModel by viewModels()
-	private lateinit var gestureDetector: GestureDetector
 	private lateinit var menuProvider: DetailsMenuProvider
 
 	override fun onCreate(savedInstanceState: Bundle?) {
@@ -162,32 +156,7 @@ class DetailsActivity :
 		viewBinding.containerBottomSheet?.let { sheet ->
 			onBackPressedDispatcher.addCallback(BottomSheetCollapseCallback(sheet))
 		}
-		gestureDetector = GestureDetector(this, object : GestureDetector.SimpleOnGestureListener() {
-			override fun onSingleTapConfirmed(e: MotionEvent): Boolean {
-				val tv = viewBinding.textViewTitle
-				TransitionManager.beginDelayedTransition(tv.parent as ViewGroup)
-				if (tv.maxLines == 5) {
-					tv.maxLines = 20 // Expand text
-				} else {
-					tv.maxLines = 5 // Collapse text
-				}
-				return true
-			}
-
-			override fun onLongPress(e: MotionEvent) {
-				val clipboardManager = getSystemService(Context.CLIPBOARD_SERVICE) as ClipboardManager
-				val clip = ClipData.newPlainText("copied text", viewBinding.textViewTitle.text)
-				clipboardManager.setPrimaryClip(clip)
-				Toast.makeText(this@DetailsActivity, "Text copied", Toast.LENGTH_SHORT).show()
-			}
-		})
-
-		viewBinding.textViewTitle.setOnTouchListener { _, motionEvent ->
-			gestureDetector.onTouchEvent(motionEvent)
-			true
-		}
-
-
+		TitleExpandListener(viewBinding.textViewTitle).attach()
 
 		viewModel.details.filterNotNull().observe(this, ::onMangaUpdated)
 		viewModel.onMangaRemoved.observeEvent(this, ::onMangaRemoved)

app/src/main/kotlin/org/koitharu/kotatsu/details/ui/TitleExpandListener.kt

@@ -0,0 +1,45 @@
+package org.koitharu.kotatsu.details.ui
+
+import android.annotation.SuppressLint
+import android.transition.TransitionManager
+import android.view.GestureDetector
+import android.view.MotionEvent
+import android.view.View
+import android.view.View.OnTouchListener
+import android.view.ViewGroup
+import org.koitharu.kotatsu.R
+import org.koitharu.kotatsu.core.ui.widgets.SelectableTextView
+import org.koitharu.kotatsu.core.util.ext.isAnimationsEnabled
+
+@SuppressLint("ClickableViewAccessibility")
+class TitleExpandListener(
+	private val textView: SelectableTextView,
+) : GestureDetector.SimpleOnGestureListener(), OnTouchListener {
+
+	private val gestureDetector = GestureDetector(textView.context, this)
+	private val linesExpanded = textView.resources.getInteger(R.integer.details_description_lines)
+	private val linesCollapsed = textView.resources.getInteger(R.integer.details_title_lines)
+
+	override fun onTouch(v: View?, event: MotionEvent) = gestureDetector.onTouchEvent(event)
+
+	override fun onSingleTapConfirmed(e: MotionEvent): Boolean {
+		if (textView.context.isAnimationsEnabled) {
+			TransitionManager.beginDelayedTransition(textView.parent as ViewGroup)
+		}
+		if (textView.maxLines in 1 until Integer.MAX_VALUE) {
+			textView.maxLines = Integer.MAX_VALUE
+		} else {
+			textView.maxLines = linesCollapsed
+		}
+		return true
+	}
+
+	override fun onLongPress(e: MotionEvent) {
+		textView.maxLines = Integer.MAX_VALUE
+		textView.selectAll()
+	}
+
+	fun attach() {
+		textView.setOnTouchListener(this)
+	}
+}

app/src/main/res/layout/activity_details.xml

@@ -84,7 +84,7 @@
 				android:layout_marginTop="16dp"
 				android:layout_marginEnd="16dp"
 				android:ellipsize="end"
-				android:maxLines="5"
+				android:maxLines="@integer/details_title_lines"
 				android:textAppearance="?attr/textAppearanceHeadlineSmall"
 				android:textIsSelectable="true"
 				app:layout_constraintEnd_toEndOf="parent"

app/src/main/res/values/integers.xml

@@ -8,6 +8,7 @@
 	<integer name="manga_badge_max_character_count">3</integer>
 	<integer name="explore_buttons_columns">2</integer>
 	<integer name="details_description_lines">4</integer>
+	<integer name="details_title_lines">4</integer>
 
 	<integer name="splash_screen_duration">450</integer>
 </resources>