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shabichashabicha
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feat: add emoji helper classes
1 parent a71b8e5 commit 8b24fee

3 files changed

Lines changed: 279 additions & 1 deletion

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‎app/src/main/java/be/scri/helpers/AutoGridLayoutManager.kt‎

Lines changed: 34 additions & 1 deletion
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// SPDX-License-Identifier: GPL-3.0-or-later
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package be.scri.helpers
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class AutoGridLayoutManager {
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import android.content.Context
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import androidx.recyclerview.widget.GridLayoutManager
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import androidx.recyclerview.widget.RecyclerView
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/**
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* A GridLayoutManager that automatically calculates the number of columns
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* based on the available width and desired item width.
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* Based on Fossify's AutoGridLayoutManager approach.
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*
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* @param context The application context.
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* @param itemWidth The desired width of each item in pixels.
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*/
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class AutoGridLayoutManager(
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context: Context,
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private val itemWidth: Int,
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) : GridLayoutManager(context, 1) {
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/**
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* Recalculates the span count based on available width before laying out children.
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*/
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override fun onLayoutChildren(
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recycler: RecyclerView.Recycler?,
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state: RecyclerView.State?,
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) {
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val width = width
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val height = height
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if (itemWidth > 0 && width > 0 && height > 0) {
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val totalSpace = width - paddingRight - paddingLeft
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val spanCount = maxOf(1, totalSpace / itemWidth)
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setSpanCount(spanCount)
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}
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super.onLayoutChildren(recycler, state)
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}
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}

‎app/src/main/java/be/scri/helpers/EmojiAdapter.kt‎

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// SPDX-License-Identifier: GPL-3.0-or-later
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package be.scri.helpers
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import android.annotation.SuppressLint
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import android.content.Context
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import android.view.LayoutInflater
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import android.view.ViewGroup
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import android.widget.TextView
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import androidx.recyclerview.widget.RecyclerView
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import be.scri.R
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/**
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* RecyclerView adapter for displaying emojis and category headers in the emoji palette.
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* Directly based on Fossify's EmojisAdapter implementation.
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*
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* @param context The application context.
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* @param items The list of items to display, either categories or emojis.
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* @param itemClick Callback invoked when the user taps an emoji.
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*/
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class EmojiAdapter(
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val context: Context,
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var items: List<Item>,
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val itemClick: (emoji: EmojiData) -> Unit,
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) : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
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private val layoutInflater = LayoutInflater.from(context)
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override fun onCreateViewHolder(
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parent: ViewGroup,
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viewType: Int,
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): RecyclerView.ViewHolder =
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when (viewType) {
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ITEM_TYPE_EMOJI -> EmojiViewHolder(
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layoutInflater.inflate(R.layout.item_emoji, parent, false),
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)
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ITEM_TYPE_CATEGORY -> EmojiCategoryViewHolder(
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layoutInflater.inflate(R.layout.item_emoji_category_title, parent, false),
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)
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else -> throw IllegalArgumentException("Unsupported view type: $viewType")
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}
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override fun onBindViewHolder(
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holder: RecyclerView.ViewHolder,
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position: Int,
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) {
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when (holder) {
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is EmojiViewHolder -> holder.bindView(items[position] as Item.Emoji)
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is EmojiCategoryViewHolder -> holder.bindView(items[position] as Item.Category)
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}
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}
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override fun getItemViewType(position: Int): Int =
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when (items[position]) {
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is Item.Emoji -> ITEM_TYPE_EMOJI
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is Item.Category -> ITEM_TYPE_CATEGORY
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}
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override fun getItemCount() = items.size
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/**
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* Updates the adapter's item list and refreshes the RecyclerView.
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*
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* @param emojiItems The new list of items to display.
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*/
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@SuppressLint("NotifyDataSetChanged")
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fun updateItems(emojiItems: List<Item>) {
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items = emojiItems
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notifyDataSetChanged()
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}
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/**
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* ViewHolder for a single emoji item.
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*
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* @param view The inflated item_emoji view.
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*/
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inner class EmojiViewHolder(
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view: android.view.View,
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) : RecyclerView.ViewHolder(view) {
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private val emojiValue: TextView = view.findViewById(R.id.emoji_value)
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fun bindView(emoji: Item.Emoji) {
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emojiValue.text = emoji.emojiData.emoji
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itemView.setOnClickListener {
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itemClick.invoke(emoji.emojiData)
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}
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}
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}
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/**
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* ViewHolder for a category header.
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*
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* @param view The inflated item_emoji_category_title view.
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*/
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inner class EmojiCategoryViewHolder(
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view: android.view.View,
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) : RecyclerView.ViewHolder(view) {
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private val emojiCategoryTitle: TextView = view.findViewById(R.id.emoji_category_title)
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fun bindView(category: Item.Category) {
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emojiCategoryTitle.text = context.getString(getCategoryTitleRes(category.value))
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}
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}
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/**
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* Sealed interface representing items in the emoji list.
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* Either a category header or an individual emoji.
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*/
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sealed interface Item {
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/** A single tappable emoji. */
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data class Emoji(val emojiData: EmojiData) : Item
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/** A category header row. */
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data class Category(val value: String) : Item
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}
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companion object {
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private const val ITEM_TYPE_EMOJI = 0
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private const val ITEM_TYPE_CATEGORY = 1
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}
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}

‎app/src/main/java/be/scri/helpers/EmojiHelper.kt‎

Lines changed: 126 additions & 0 deletions
Original file line numberDiff line numberDiff line change
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// SPDX-License-Identifier: GPL-3.0-or-later
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package be.scri.helpers
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import android.content.Context
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import be.scri.R
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private var cachedEmojiData: MutableList<EmojiData>? = null
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const val EMOJI_SPEC_FILE_PATH = "emoji_spec.txt"
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/**
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* Reads the emoji spec file and returns a parsed list of EmojiData.
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* Directly based on Fossify's parseRawEmojiSpecsFile() implementation.
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*
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* @param context The application context used to access assets.
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* @param path The path to the emoji spec file within assets.
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* @return A mutable list of [EmojiData] objects parsed from the file.
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*/
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fun parseRawEmojiSpecsFile(
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context: Context,
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path: String,
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): MutableList<EmojiData> {
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// if (cachedEmojiData != null) {
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// return cachedEmojiData!!
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// }
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val emojis = mutableListOf<EmojiData>()
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var emojiEditorList: MutableList<String>? = null
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var category: String? = null
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fun commitEmojiEditorList() {
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emojiEditorList?.let {
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val base = it.first()
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val variants = it.drop(1)
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emojis.add(EmojiData(category ?: "none", base, variants))
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}
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emojiEditorList = null
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}
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context.assets.open(path).bufferedReader().useLines { lines ->
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for (line in lines) {
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when {
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line.startsWith("#") -> { }
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line.startsWith("[") -> {
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commitEmojiEditorList()
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category = line.replace("[", "").replace("]", "")
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}
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line.trim().isEmpty() -> continue
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else -> {
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if (!line.startsWith("\t")) {
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commitEmojiEditorList()
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}
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val data = line.split(";")
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if (data.size == 3) {
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val emoji = data[0].trim()
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if (emojiEditorList != null) {
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emojiEditorList!!.add(emoji)
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} else {
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emojiEditorList = mutableListOf(emoji)
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}
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}
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}
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}
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}
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commitEmojiEditorList()
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}
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cachedEmojiData = emojis
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return emojis
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}
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/**
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* Data class representing a single emoji with its category and skin tone variants.
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* Directly based on Fossify's EmojiData model.
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*
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* @param category The category this emoji belongs to.
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* @param emoji The base emoji character string.
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* @param variants The list of skin tone or other variants.
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*/
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data class EmojiData(
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val category: String,
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val emoji: String,
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val variants: List<String>,
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)
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/**
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* Returns the drawable resource ID for a given emoji category icon.
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* Based on Fossify's getCategoryIconRes() function.
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*
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* @param category The category name from the emoji spec file.
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* @return The drawable resource ID for the category icon.
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*/
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fun getCategoryIconRes(category: String): Int =
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when (category) {
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"smileys_emotion" -> R.drawable.ic_emoji_smileys
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"people_body" -> R.drawable.ic_emoji_people
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"animals_nature" -> R.drawable.ic_emoji_animals
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"food_drink" -> R.drawable.ic_emoji_food
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"travel_places" -> R.drawable.ic_emoji_travel
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"activities" -> R.drawable.ic_emoji_activities
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"objects" -> R.drawable.ic_emoji_objects
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"symbols" -> R.drawable.ic_emoji_symbols
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"flags" -> R.drawable.ic_emoji_flags
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else -> R.drawable.ic_emoji_vector
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}
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/**
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* Returns the string resource ID for a given emoji category title.
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* Based on Fossify's getCategoryTitleRes() function.
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*
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* @param category The category name from the emoji spec file.
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* @return The string resource ID for the category title.
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*/
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fun getCategoryTitleRes(category: String): Int =
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when (category) {
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"smileys_emotion" -> R.string.smileys_and_emotions
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"people_body" -> R.string.people_and_body
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"animals_nature" -> R.string.animals_and_nature
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"food_drink" -> R.string.food_and_drink
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"travel_places" -> R.string.travel_and_places
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"activities" -> R.string.activities
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"objects" -> R.string.objects
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"symbols" -> R.string.symbols
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"flags" -> R.string.flags
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else -> R.string.recently_used
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}

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