Convert util/{HttpHeaderLink,PairedList,TimestampUtils,ThemeUtils} to Kotlin (#3046)

* Fix off-by-one error in HttpHeaderLink

Link headers with multiple URLs with multiple parameters were being parsed
incorrectly.

Detected by adding unit tests ahead of converting to Kotlin.

* Convert util/HttpHeaderLink from Java to Kotlin

* Convert util/ThemeUtils from Java to Kotlin

* Convert util/TimestampUtils from Java to Kotlin

* Add tests for PairedList

* Convert util/PairedList from Java to Kotlin

* Implement feedback from PR

* Relicense as GPL

app/src/main/java/com/keylesspalace/tusky/adapter/LocaleAdapter.kt

@@ -21,7 +21,7 @@ import android.view.View
 import android.view.ViewGroup
 import android.widget.ArrayAdapter
 import android.widget.TextView
-import com.keylesspalace.tusky.util.ThemeUtils
+import com.google.android.material.color.MaterialColors
 import com.keylesspalace.tusky.util.getTuskyDisplayName
 import com.keylesspalace.tusky.util.modernLanguageCode
 import java.util.Locale
@@ -29,7 +29,7 @@ import java.util.Locale
 class LocaleAdapter(context: Context, resource: Int, locales: List<Locale>) : ArrayAdapter<Locale>(context, resource, locales) {
     override fun getView(position: Int, convertView: View?, parent: ViewGroup): View {
         return (super.getView(position, convertView, parent) as TextView).apply {
-            setTextColor(ThemeUtils.getColor(context, android.R.attr.textColorTertiary))
+            setTextColor(MaterialColors.getColor(this, android.R.attr.textColorTertiary))
             typeface = Typeface.DEFAULT_BOLD
             text = super.getItem(position)?.modernLanguageCode?.uppercase()
         }
@@ -37,7 +37,7 @@ class LocaleAdapter(context: Context, resource: Int, locales: List<Locale>) : Ar
 
     override fun getDropDownView(position: Int, convertView: View?, parent: ViewGroup): View {
         return (super.getDropDownView(position, convertView, parent) as TextView).apply {
-            setTextColor(ThemeUtils.getColor(context, android.R.attr.textColorTertiary))
+            setTextColor(MaterialColors.getColor(this, android.R.attr.textColorTertiary))
             text = super.getItem(position)?.getTuskyDisplayName(context)
         }
     }

app/src/main/java/com/keylesspalace/tusky/adapter/ReportNotificationViewHolder.kt

@@ -24,8 +24,8 @@ import com.keylesspalace.tusky.adapter.NotificationsAdapter.NotificationActionLi
 import com.keylesspalace.tusky.databinding.ItemReportNotificationBinding
 import com.keylesspalace.tusky.entity.Report
 import com.keylesspalace.tusky.entity.TimelineAccount
-import com.keylesspalace.tusky.util.TimestampUtils
 import com.keylesspalace.tusky.util.emojify
+import com.keylesspalace.tusky.util.getRelativeTimeSpanString
 import com.keylesspalace.tusky.util.loadAvatar
 import com.keylesspalace.tusky.util.unicodeWrap
 import java.util.Date
@@ -41,7 +41,7 @@ class ReportNotificationViewHolder(
 
         binding.notificationTopText.setCompoundDrawablesWithIntrinsicBounds(icon, null, null, null)
         binding.notificationTopText.text = itemView.context.getString(R.string.notification_header_report_format, reporterName, reporteeName)
-        binding.notificationSummary.text = itemView.context.getString(R.string.notification_summary_report_format, TimestampUtils.getRelativeTimeSpanString(itemView.context, report.createdAt.time, Date().time), report.status_ids?.size ?: 0)
+        binding.notificationSummary.text = itemView.context.getString(R.string.notification_summary_report_format, getRelativeTimeSpanString(itemView.context, report.createdAt.time, Date().time), report.status_ids?.size ?: 0)
         binding.notificationCategory.text = getTranslatedCategory(itemView.context, report.category)
 
         // Fancy avatar inset

app/src/main/java/com/keylesspalace/tusky/adapter/StatusBaseViewHolder.java

@@ -33,6 +33,7 @@ import androidx.recyclerview.widget.RecyclerView;
 import com.bumptech.glide.Glide;
 import com.bumptech.glide.RequestBuilder;
 import com.google.android.material.button.MaterialButton;
+import com.google.android.material.color.MaterialColors;
 import com.google.android.material.imageview.ShapeableImageView;
 import com.google.android.material.shape.CornerFamily;
 import com.google.android.material.shape.ShapeAppearanceModel;
@@ -53,7 +54,6 @@ import com.keylesspalace.tusky.util.CustomEmojiHelper;
 import com.keylesspalace.tusky.util.ImageLoadingHelper;
 import com.keylesspalace.tusky.util.LinkHelper;
 import com.keylesspalace.tusky.util.StatusDisplayOptions;
-import com.keylesspalace.tusky.util.ThemeUtils;
 import com.keylesspalace.tusky.util.TimestampUtils;
 import com.keylesspalace.tusky.util.TouchDelegateHelper;
 import com.keylesspalace.tusky.view.MediaPreviewImageView;
@@ -170,7 +170,7 @@ public abstract class StatusBaseViewHolder extends RecyclerView.ViewHolder {
         this.avatarRadius36dp = itemView.getContext().getResources().getDimensionPixelSize(R.dimen.avatar_radius_36dp);
         this.avatarRadius24dp = itemView.getContext().getResources().getDimensionPixelSize(R.dimen.avatar_radius_24dp);
 
-        mediaPreviewUnloaded = new ColorDrawable(ThemeUtils.getColor(itemView.getContext(), R.attr.colorBackgroundAccent));
+        mediaPreviewUnloaded = new ColorDrawable(MaterialColors.getColor(itemView, R.attr.colorBackgroundAccent));
 
         TouchDelegateHelper.expandTouchSizeToFillRow((ViewGroup) itemView, CollectionsKt.listOfNotNull(replyButton, reblogButton, favouriteButton, bookmarkButton, moreButton));
     }

app/src/main/java/com/keylesspalace/tusky/adapter/TabAdapter.kt

@@ -23,6 +23,7 @@ import androidx.core.view.size
 import androidx.recyclerview.widget.RecyclerView
 import androidx.viewbinding.ViewBinding
 import com.google.android.material.chip.Chip
+import com.google.android.material.color.MaterialColors
 import com.keylesspalace.tusky.HASHTAG
 import com.keylesspalace.tusky.LIST
 import com.keylesspalace.tusky.R
@@ -30,8 +31,8 @@ import com.keylesspalace.tusky.TabData
 import com.keylesspalace.tusky.databinding.ItemTabPreferenceBinding
 import com.keylesspalace.tusky.databinding.ItemTabPreferenceSmallBinding
 import com.keylesspalace.tusky.util.BindingHolder
-import com.keylesspalace.tusky.util.ThemeUtils
 import com.keylesspalace.tusky.util.hide
+import com.keylesspalace.tusky.util.setDrawableTint
 import com.keylesspalace.tusky.util.show
 
 interface ItemInteractionListener {
@@ -101,7 +102,7 @@ class TabAdapter(
                 listener.onTabRemoved(holder.bindingAdapterPosition)
             }
             binding.removeButton.isEnabled = removeButtonEnabled
-            ThemeUtils.setDrawableTint(
+            setDrawableTint(
                 holder.itemView.context,
                 binding.removeButton.drawable,
                 (if (removeButtonEnabled) android.R.attr.textColorTertiary else R.attr.textColorDisabled)
@@ -120,7 +121,7 @@ class TabAdapter(
                     val chip = binding.chipGroup.getChildAt(i).takeUnless { it.id == R.id.actionChip } as Chip?
                         ?: Chip(context).apply {
                             binding.chipGroup.addView(this, binding.chipGroup.size - 1)
-                            chipIconTint = ColorStateList.valueOf(ThemeUtils.getColor(context, android.R.attr.textColorPrimary))
+                            chipIconTint = ColorStateList.valueOf(MaterialColors.getColor(this, android.R.attr.textColorPrimary))
                         }
 
                     chip.text = arg