Merge branch 'feature/webtoon-margins' of git://github.com/jleehey/tachiyomi into jleehey-feature/webtoon-margins

# Conflicts:
#	app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferenceKeys.kt
#	app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderSettingsSheet.kt
#	app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonConfig.kt
#	app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonPageHolder.kt
#	app/src/main/java/eu/kanade/tachiyomi/util/preference/PreferenceDSL.kt
#	app/src/main/res/values/strings.xml

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferenceKeys.kt

@@ -57,6 +57,8 @@ object PreferenceKeys {
 
     const val readWithVolumeKeysInverted = "reader_volume_keys_inverted"
 
+    const val marginRatioWebtoon = "margin_ratio_webtoon"
+
     const val portraitColumns = "pref_library_columns_portrait_key"
 
     const val landscapeColumns = "pref_library_columns_landscape_key"

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt

@@ -107,6 +107,8 @@ class PreferencesHelper(val context: Context) {
 
     fun cropBordersWebtoon() = rxPrefs.getBoolean(Keys.cropBordersWebtoon, false)
 
+    fun marginRatioWebtoon() = rxPrefs.getFloat(Keys.marginRatioWebtoon, 0f)
+
     fun readWithTapping() = rxPrefs.getBoolean(Keys.readWithTapping, true)
 
     fun readWithLongTap() = rxPrefs.getBoolean(Keys.readWithLongTap, true)

app/src/main/java/eu/kanade/tachiyomi/ui/reader/ReaderSettingsSheet.kt

@@ -4,6 +4,7 @@ import android.os.Build
 import android.os.Bundle
 import android.widget.CompoundButton
 import android.widget.Spinner
+import androidx.annotation.ArrayRes
 import androidx.core.widget.NestedScrollView
 import com.f2prateek.rx.preferences.Preference
 import com.google.android.material.bottomsheet.BottomSheetDialog
@@ -23,6 +24,7 @@ import kotlinx.android.synthetic.main.reader_settings_sheet.cutout_short
 import kotlinx.android.synthetic.main.reader_settings_sheet.fullscreen
 import kotlinx.android.synthetic.main.reader_settings_sheet.keepscreen
 import kotlinx.android.synthetic.main.reader_settings_sheet.long_tap
+import kotlinx.android.synthetic.main.reader_settings_sheet.margin_ratio_webtoon
 import kotlinx.android.synthetic.main.reader_settings_sheet.page_transitions
 import kotlinx.android.synthetic.main.reader_settings_sheet.pager_prefs_group
 import kotlinx.android.synthetic.main.reader_settings_sheet.rotation_mode
@@ -112,6 +114,7 @@ class ReaderSettingsSheet(private val activity: ReaderActivity) : BottomSheetDia
         webtoon_prefs_group.visible()
 
         crop_borders_webtoon.bindToPreference(preferences.cropBordersWebtoon())
+        margin_ratio_webtoon.bindToFloatPreference(preferences.marginRatioWebtoon(), R.array.webtoon_margin_ratio_values)
     }
 
     /**
@@ -131,4 +134,18 @@ class ReaderSettingsSheet(private val activity: ReaderActivity) : BottomSheetDia
         }
         setSelection(pref.getOrDefault() - offset, false)
     }
+
+    /**
+     * Binds a spinner to a float preference. The position of the spinner item must
+     * correlate with the [floatValues] resource item (in arrays.xml), which is a <string-array>
+     * of float values that will be parsed here and applied to the preference.
+     */
+    private fun Spinner.bindToFloatPreference(pref: Preference<Float>, @ArrayRes floatValuesResource: Int) {
+        val floatValues = resources.getStringArray(floatValuesResource).map { it.toFloatOrNull() }
+        onItemSelectedListener = IgnoreFirstSpinnerListener { position ->
+            pref.set(floatValues[position])
+        }
+        setSelection(floatValues.indexOf(pref.getOrDefault()), false)
+    }
+
 }

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonConfig.kt

@@ -37,6 +37,9 @@ class WebtoonConfig(preferences: PreferencesHelper = Injekt.get()) {
     var alwaysShowChapterTransition = true
         private set
 
+    var marginRatio = 0f
+        private set
+
     init {
         preferences.readWithTapping()
                 .register({ tappingEnabled = it })
@@ -58,6 +61,9 @@ class WebtoonConfig(preferences: PreferencesHelper = Injekt.get()) {
 
         preferences.alwaysShowChapterTransition()
                 .register({ alwaysShowChapterTransition = it })
+
+        preferences.marginRatioWebtoon()
+            .register({ marginRatio = it }, { imagePropertyChangedListener?.invoke() })
     }
 
     fun unsubscribe() {

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonPageHolder.kt

@@ -2,9 +2,11 @@ package eu.kanade.tachiyomi.ui.reader.viewer.webtoon
 
 import android.annotation.SuppressLint
 import android.content.Intent
+import android.content.res.Resources
 import android.graphics.drawable.Drawable
 import android.net.Uri
 import android.view.Gravity
+import android.view.View
 import android.view.ViewGroup
 import android.view.ViewGroup.LayoutParams.MATCH_PARENT
 import android.view.ViewGroup.LayoutParams.WRAP_CONTENT
@@ -128,6 +130,10 @@ class WebtoonPageHolder(
             if (!viewer.isContinuous) {
                 bottomMargin = 15.dpToPx
             }
+
+            val margin = Resources.getSystem().displayMetrics.widthPixels * viewer.config.marginRatio
+            marginEnd = margin.toInt()
+            marginStart = margin.toInt()
         }
     }
 

app/src/main/java/eu/kanade/tachiyomi/ui/reader/viewer/webtoon/WebtoonViewer.kt

@@ -121,6 +121,8 @@ class WebtoonViewer(val activity: ReaderActivity, val isContinuous: Boolean = tr
 
         frame.layoutParams = ViewGroup.LayoutParams(MATCH_PARENT, MATCH_PARENT)
         frame.addView(recycler)
+
+        config.imagePropertyChangedListener = { adapter.notifyDataSetChanged() }
     }
 
     private fun checkAllowPreload(page: ReaderPage?): Boolean {

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsReaderController.kt

@@ -146,6 +146,17 @@ class SettingsReaderController : SettingsController() {
                 titleRes = R.string.pref_crop_borders
                 defaultValue = false
             }
+
+            floatListPreference {
+                key = Keys.marginRatioWebtoon
+                titleRes = R.string.pref_reader_margin
+                entriesRes = arrayOf(R.string.webtoon_margin_ratio_0,
+                        R.string.webtoon_margin_ratio_10, R.string.webtoon_margin_ratio_15,
+                        R.string.webtoon_margin_ratio_20, R.string.webtoon_margin_ratio_25)
+                entryValues = arrayOf("0", "0.1", "0.15", "0.2", "0.25")
+                defaultValue = "0"
+                summary = "%s"
+            }
         }
 
         preferenceCategory {

app/src/main/java/eu/kanade/tachiyomi/util/preference/PreferenceDSL.kt

@@ -14,6 +14,7 @@ import androidx.preference.PreferenceScreen
 import androidx.preference.SwitchPreferenceCompat
 import androidx.vectordrawable.graphics.drawable.VectorDrawableCompat
 import eu.kanade.tachiyomi.widget.preference.BadgePreference
+import eu.kanade.tachiyomi.widget.preference.FloatListPreference
 import eu.kanade.tachiyomi.widget.preference.IntListPreference
 import eu.kanade.tachiyomi.widget.preference.SwitchPreferenceCategory
 
@@ -53,6 +54,10 @@ inline fun PreferenceGroup.intListPreference(block: (@DSL IntListPreference).()
     return initThenAdd(IntListPreference(context), block).also(::initDialog)
 }
 
+inline fun PreferenceGroup.floatListPreference(block: (@DSL FloatListPreference).() -> Unit): FloatListPreference {
+    return initThenAdd(FloatListPreference(context), block).also(::initDialog)
+}
+
 inline fun PreferenceGroup.multiSelectListPreference(block: (@DSL MultiSelectListPreference).() -> Unit): MultiSelectListPreference {
     return initThenAdd(MultiSelectListPreference(context), block).also(::initDialog)
 }

app/src/main/java/eu/kanade/tachiyomi/widget/preference/FloatListPreference.kt

@@ -0,0 +1,26 @@
+package eu.kanade.tachiyomi.widget.preference
+
+import android.content.Context
+import android.util.AttributeSet
+import androidx.preference.ListPreference
+
+class FloatListPreference @JvmOverloads constructor(context: Context, attrs: AttributeSet? = null) :
+        ListPreference(context, attrs) {
+
+    override fun persistString(value: String?): Boolean {
+        return value != null && persistFloat(value.toFloat())
+    }
+
+    override fun getPersistedString(defaultReturnValue: String?): String? {
+        // When the underlying preference is using a PreferenceDataStore, there's no way (for now)
+        // to check if a value is in the store, so we use a most likely unused value as workaround
+        val defaultIntValue = Float.NEGATIVE_INFINITY
+
+        val value = getPersistedFloat(defaultIntValue)
+        return if (value != defaultIntValue) {
+            value.toString()
+        } else {
+            defaultReturnValue
+        }
+    }
+}