Support no-fullheight pages in webtoon mode

.idea/misc.xml

@@ -23,6 +23,7 @@
         <entry key="app/src/main/res/layout/item_manga_grid.xml" value="0.26042632066728455" />
         <entry key="app/src/main/res/layout/item_manga_list_details.xml" value="0.2601851851851852" />
         <entry key="app/src/main/res/layout/item_page_thumb.xml" value="0.2601851851851852" />
+        <entry key="app/src/main/res/layout/item_page_webtoon.xml" value="0.13095238095238096" />
         <entry key="app/src/main/res/layout/item_recent.xml" value="0.2601851851851852" />
         <entry key="app/src/main/res/layout/sheet_pages.xml" value="0.2601851851851852" />
         <entry key="app/src/main/res/menu/popup_category.xml" value="0.2601851851851852" />

app/src/main/java/org/koitharu/kotatsu/reader/ui/pager/wetoon/WebtoonImageView.kt

@@ -10,6 +10,7 @@ class WebtoonImageView @JvmOverloads constructor(context: Context, attr: Attribu
 	SubsamplingScaleImageView(context, attr) {
 
 	private val ct = PointF()
+	private val displayHeight = resources.displayMetrics.heightPixels
 
 	private var scrollPos = 0
 	private var scrollRange = SCROLL_UNKNOWN
@@ -46,6 +47,14 @@ class WebtoonImageView @JvmOverloads constructor(context: Context, attr: Attribu
 		super.recycle()
 	}
 
+	override fun getSuggestedMinimumHeight(): Int {
+		var desiredHeight = super.getSuggestedMinimumHeight()
+		if (sHeight == 0 && desiredHeight < displayHeight) {
+			desiredHeight = displayHeight
+		}
+		return desiredHeight
+	}
+
 	private fun scrollToInternal(pos: Int) {
 		scrollPos = pos
 		ct.set(sWidth / 2f, (height / 2f + pos.toFloat()) / minScale)

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

@@ -4,12 +4,12 @@
 	xmlns:app="http://schemas.android.com/apk/res-auto"
 	xmlns:tools="http://schemas.android.com/tools"
 	android:layout_width="match_parent"
-	android:layout_height="match_parent">
+	android:layout_height="wrap_content">
 
 	<org.koitharu.kotatsu.reader.ui.pager.wetoon.WebtoonImageView
 		android:id="@+id/ssiv"
 		android:layout_width="match_parent"
-		android:layout_height="match_parent"
+		android:layout_height="wrap_content"
 		app:zoomEnabled="false"
 		app:quickScaleEnabled="false"
 		app:panEnabled="false" />