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ContentRecycler: add awful recycler for content

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Currently exploding the amount of views to use because recyclers are NOT
fun to use.
This commit is contained in:
dece 2021-12-09 01:43:51 +01:00
parent f2eae54234
commit e540cf7628
13 changed files with 264 additions and 65 deletions
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109
app/src/main/java/dev/lowrespalmtree/comet/ContentRecycler.kt Normal file
View file

@ -0,0 +1,109 @@
package dev.lowrespalmtree.comet
import android.text.SpannableString
import android.text.style.UnderlineSpan
import android.util.Log
import android.view.LayoutInflater
import android.view.View
import android.view.ViewGroup
import androidx.recyclerview.widget.RecyclerView
import dev.lowrespalmtree.comet.databinding.*
class ContentAdapter(private var content: List<Line>, private val listener: ContentAdapterListen) :
RecyclerView.Adapter<ContentAdapter.ContentViewHolder>() {
interface ContentAdapterListen {
fun onLinkClick(url: String)
}
override fun getItemViewType(position: Int): Int =
when (content[position]) {
is EmptyLine -> TYPE_EMPTY
is ParagraphLine -> TYPE_PARAGRAPH
is LinkLine -> TYPE_LINK
is PreFenceLine -> TYPE_PRE_FENCE
is PreTextLine -> TYPE_PRE_TEXT
is BlockquoteLine -> TYPE_BLOCKQUOTE
is ListItemLine -> TYPE_LIST_ITEM
is TitleLine -> when ((content[position] as TitleLine).level) {
1 -> TYPE_TITLE_1
2 -> TYPE_TITLE_2
3 -> TYPE_TITLE_3
else -> error("invalid title level")
}
else -> error("unknown line type")
}
override fun onCreateViewHolder(parent: ViewGroup, viewType: Int): ContentViewHolder {
Log.d(TAG, "onCreateViewHolder: type $viewType")
return LayoutInflater.from(parent.context).let {
when (viewType) {
TYPE_EMPTY -> ContentViewHolder.Empty(GemtextEmptyBinding.inflate(it))
TYPE_PARAGRAPH -> ContentViewHolder.Paragraph(GemtextParagraphBinding.inflate(it))
TYPE_TITLE_1 -> ContentViewHolder.Title1(GemtextTitle1Binding.inflate(it))
TYPE_TITLE_2 -> ContentViewHolder.Title2(GemtextTitle2Binding.inflate(it))
TYPE_TITLE_3 -> ContentViewHolder.Title3(GemtextTitle3Binding.inflate(it))
TYPE_LINK -> ContentViewHolder.Link(GemtextLinkBinding.inflate(it))
TYPE_PRE_FENCE -> ContentViewHolder.PreFence(GemtextEmptyBinding.inflate(it))
TYPE_PRE_TEXT -> ContentViewHolder.PreText(GemtextPreformattedBinding.inflate(it))
TYPE_BLOCKQUOTE -> ContentViewHolder.Blockquote(GemtextBlockquoteBinding.inflate(it))
TYPE_LIST_ITEM -> ContentViewHolder.ListItem(GemtextListItemBinding.inflate(it))
else -> error("invalid view type")
}
}
}
override fun onBindViewHolder(holder: ContentViewHolder, position: Int) {
Log.d(TAG, "onBindViewHolder: position $position")
val line = content[position]
when (holder) {
is ContentViewHolder.Paragraph -> holder.binding.textView.text =
(line as ParagraphLine).text
is ContentViewHolder.Title1 -> holder.binding.textView.text = (line as TitleLine).text
is ContentViewHolder.Title2 -> holder.binding.textView.text = (line as TitleLine).text
is ContentViewHolder.Title3 -> holder.binding.textView.text = (line as TitleLine).text
is ContentViewHolder.Link -> {
val text = if ((line as LinkLine).label.isNotEmpty()) line.label else line.url
val underlined = SpannableString(text)
underlined.setSpan(UnderlineSpan(), 0, underlined.length, 0)
holder.binding.textView.text = underlined
holder.binding.root.setOnClickListener { listener.onLinkClick(line.url) }
}
else -> {}
}
}
override fun getItemCount(): Int = content.size
fun setContent(content: List<Line>) {
this.content = content
notifyDataSetChanged()
}
sealed class ContentViewHolder(view: View) : RecyclerView.ViewHolder(view) {
class Empty(val binding: GemtextEmptyBinding) : ContentViewHolder(binding.root)
class Paragraph(val binding: GemtextParagraphBinding) : ContentViewHolder(binding.root)
class Title1(val binding: GemtextTitle1Binding) : ContentViewHolder(binding.root)
class Title2(val binding: GemtextTitle2Binding) : ContentViewHolder(binding.root)
class Title3(val binding: GemtextTitle3Binding) : ContentViewHolder(binding.root)
class Link(val binding: GemtextLinkBinding) : ContentViewHolder(binding.root)
class PreFence(val binding: GemtextEmptyBinding) : ContentViewHolder(binding.root)
class PreText(val binding: GemtextPreformattedBinding) : ContentViewHolder(binding.root)
class Blockquote(val binding: GemtextBlockquoteBinding) : ContentViewHolder(binding.root)
class ListItem(val binding: GemtextListItemBinding) : ContentViewHolder(binding.root)
}
companion object {
const val TAG = "ContentRecycler"
const val TYPE_EMPTY = 0
const val TYPE_PARAGRAPH = 1
const val TYPE_TITLE_1 = 2
const val TYPE_TITLE_2 = 3
const val TYPE_TITLE_3 = 4
const val TYPE_LINK = 5
const val TYPE_PRE_FENCE = 6
const val TYPE_PRE_TEXT = 7
const val TYPE_BLOCKQUOTE = 8
const val TYPE_LIST_ITEM = 9
}
}

20
app/src/main/java/dev/lowrespalmtree/comet/Gemtext.kt
View file

@ -7,16 +7,16 @@ import java.nio.ByteBuffer
import java.nio.CharBuffer
import java.nio.charset.Charset
open class Line
interface Line
class EmptyLine : Line()
class ParagraphLine(val text: String) : Line()
class TitleLine(val level: Int, val text: String) : Line()
class LinkLine(val url: String, val label: String) : Line()
class PreFenceLine(val caption: String) : Line()
class PreTextLine(val text: String) : Line()
class BlockquoteLine(val text: String) : Line()
class ListItemLine(val text: String) : Line()
class EmptyLine : Line
class ParagraphLine(val text: String) : Line
class TitleLine(val level: Int, val text: String) : Line
class LinkLine(val url: String, val label: String) : Line
class PreFenceLine(val caption: String) : Line
class PreTextLine(val text: String) : Line
class BlockquoteLine(val text: String) : Line
class ListItemLine(val text: String) : Line
fun parseData(
inChannel: Channel<ByteArray>,
@ -60,5 +60,3 @@ private fun parseLine(line: CharBuffer, isPreformatted: Boolean): Line =
}
private fun getCharsFrom(line: CharBuffer, index: Int) = line.substring(index).removePrefix(" ")
private const val TAG = "Gemtext"

95
app/src/main/java/dev/lowrespalmtree/comet/MainActivity.kt
View file

@ -2,6 +2,8 @@ package dev.lowrespalmtree.comet
import android.annotation.SuppressLint
import android.app.Activity
import android.content.Intent
import android.content.Intent.ACTION_VIEW
import android.net.Uri
import android.os.Bundle
import android.util.Log
@ -13,15 +15,17 @@ import androidx.lifecycle.MutableLiveData
import androidx.lifecycle.ViewModel
import androidx.lifecycle.ViewModelProvider
import androidx.lifecycle.viewModelScope
import androidx.recyclerview.widget.LinearLayoutManager
import dev.lowrespalmtree.comet.databinding.ActivityMainBinding
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.launch
import java.nio.ByteBuffer
import java.net.UnknownHostException
import java.nio.charset.Charset
class MainActivity : AppCompatActivity() {
class MainActivity : AppCompatActivity(), ContentAdapter.ContentAdapterListen {
private lateinit var binding: ActivityMainBinding
private lateinit var pageViewModel: PageViewModel
private lateinit var adapter: ContentAdapter
@SuppressLint("SetTextI18n")
override fun onCreate(savedInstanceState: Bundle?) {
@ -30,10 +34,13 @@ class MainActivity : AppCompatActivity() {
setContentView(binding.root)
pageViewModel = ViewModelProvider(this)[PageViewModel::class.java]
adapter = ContentAdapter(listOf(), this)
binding.contentRecycler.layoutManager = LinearLayoutManager(this)
binding.contentRecycler.adapter = adapter
binding.addressBar.setOnEditorActionListener { view, actionId, _ ->
if (actionId == EditorInfo.IME_ACTION_DONE) {
pageViewModel.sendRequest(view.text.toString())
openUrl(view.text.toString())
val imm = getSystemService(Activity.INPUT_METHOD_SERVICE) as InputMethodManager
imm.hideSoftInputFromWindow(view.windowToken, 0)
view.clearFocus()
@ -43,37 +50,58 @@ class MainActivity : AppCompatActivity() {
}
}
pageViewModel.sourceLiveData.observe(this, {
binding.sourceBlock.text = it
})
pageViewModel.alertLiveData.observe(this, {
AlertDialog.Builder(this)
.setTitle(R.string.alert_title)
.setMessage(it)
.create()
.show()
})
pageViewModel.linesLiveData.observe(this, { adapter.setContent(it) })
pageViewModel.alertLiveData.observe(this, { alert(it) })
}
override fun onLinkClick(url: String) {
val base = binding.addressBar.text.toString()
openUrl(url, base = if (base.isNotEmpty()) base else null)
}
private fun openUrl(url: String, base: String? = null) {
var uri = Uri.parse(url)
when (uri.scheme) {
"gemini" -> pageViewModel.sendGeminiRequest(uri)
else -> startActivity(Intent(ACTION_VIEW, uri))
}
}
private fun alert(message: String) {
AlertDialog.Builder(this)
.setTitle(R.string.alert_title)
.setMessage(message)
.create()
.show()
}
class PageViewModel : ViewModel() {
var source = ""
val sourceLiveData: MutableLiveData<String> by lazy { MutableLiveData<String>() }
private var lines = ArrayList<Line>()
val linesLiveData: MutableLiveData<List<Line>> by lazy { MutableLiveData<List<Line>>() }
val alertLiveData: MutableLiveData<String> by lazy { MutableLiveData<String>() }
fun sendRequest(url: String) {
Log.d(TAG, "sendRequest: $url")
source = ""
/**
* Perform a request against this URI.
*
* The URI must be valid, absolute and with a gemini scheme.
*/
fun sendGeminiRequest(uri: Uri) {
Log.d(TAG, "sendRequest: $uri")
viewModelScope.launch(Dispatchers.IO) {
val uri = Uri.parse(url)
if (uri.scheme != "gemini") {
alertLiveData.postValue("Can't process scheme \"${uri.scheme}\".")
val response = try {
val request = Request(uri)
val socket = request.connect()
val channel = request.proceed(socket, this)
Response.from(channel, viewModelScope)
} catch (e: UnknownHostException) {
alertLiveData.postValue("Unknown host \"${uri.authority}\".")
return@launch
} catch (e: Exception) {
Log.e(TAG, "sendGeminiRequest coroutine: ${e.stackTraceToString()}")
alertLiveData.postValue("Oops! Whatever we tried to do failed!")
return@launch
}
val request = Request(uri)
val socket = request.connect()
val channel = request.proceed(socket, this)
val response = Response.from(channel, viewModelScope)
if (response == null) {
alertLiveData.postValue("Can't parse server response.")
return@launch
@ -85,22 +113,15 @@ class MainActivity : AppCompatActivity() {
else -> alertLiveData.postValue("Can't handle code ${response.code}.")
}
}
}
private suspend fun handleRequestSuccess(response: Response) {
lines.clear()
val charset = Charset.defaultCharset()
for (line in parseData(response.data, charset, viewModelScope)) {
when (line) {
is EmptyLine -> { source += "\n" }
is ParagraphLine -> { source += line.text + "\n" }
is TitleLine -> { source += "TTL-${line.level} ${line.text}\n" }
is LinkLine -> { source += "LNK ${line.url} + ${line.label}\n" }
is PreFenceLine -> { source += "PRE ${line.caption}\n" }
is PreTextLine -> { source += line.text + "\n" }
is BlockquoteLine -> { source += "QUO ${line.text}\n" }
is ListItemLine -> { source += "LST ${line.text}\n" }
}
sourceLiveData.postValue(source)
lines.add(line)
linesLiveData.postValue(lines)
}
}
}

20
app/src/main/res/layout/activity_main.xml
View file

@ -38,26 +38,14 @@
<androidx.core.widget.NestedScrollView
android:id="@+id/scroll_view"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:layout_height="wrap_content"
app:layout_behavior="com.google.android.material.appbar.AppBarLayout$ScrollingViewBehavior">
<LinearLayout
<androidx.recyclerview.widget.RecyclerView
android:id="@+id/content_recycler"
android:layout_width="match_parent"
android:layout_height="match_parent"
android:orientation="vertical">
<TextView
android:id="@+id/source_block"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:layout_marginStart="16dp"
android:layout_marginEnd="16dp"
android:text=""
android:textAlignment="textStart"
app:layout_constraintEnd_toEndOf="parent"
app:layout_constraintStart_toStartOf="parent" />
</LinearLayout>
android:orientation="vertical" />
</androidx.core.widget.NestedScrollView>
</androidx.coordinatorlayout.widget.CoordinatorLayout>

6
app/src/main/res/layout/gemtext_blockquote.xml Normal file
View file

@ -0,0 +1,6 @@
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/text_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/teal_200" />

6
app/src/main/res/layout/gemtext_empty.xml Normal file
View file

@ -0,0 +1,6 @@
<?xml version="1.0" encoding="utf-8"?>
<Space xmlns:android="http://schemas.android.com/apk/res/android"
android:layout_width="match_parent"
android:layout_height="8dp"
android:background="@color/black">
</Space>

12
app/src/main/res/layout/gemtext_link.xml Normal file
View file

@ -0,0 +1,12 @@
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/text_view"
android:textSize="16sp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="8dp"
android:paddingEnd="8dp"
android:paddingTop="4dp"
android:paddingBottom="4dp"
android:background="@color/teal_200"
android:textIsSelectable="false" />

6
app/src/main/res/layout/gemtext_list_item.xml Normal file
View file

@ -0,0 +1,6 @@
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/text_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/teal_200" />

11
app/src/main/res/layout/gemtext_paragraph.xml Normal file
View file

@ -0,0 +1,11 @@
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/text_view"
android:textSize="16sp"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:paddingStart="8dp"
android:paddingEnd="8dp"
android:paddingTop="4dp"
android:paddingBottom="4dp"
android:background="@color/teal_200" />

6
app/src/main/res/layout/gemtext_preformatted.xml Normal file
View file

@ -0,0 +1,6 @@
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/text_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:background="@color/teal_200" />

12
app/src/main/res/layout/gemtext_title1.xml Normal file
View file

@ -0,0 +1,12 @@
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/text_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="30sp"
android:textStyle="bold"
android:paddingStart="8dp"
android:paddingEnd="8dp"
android:paddingTop="16dp"
android:paddingBottom="4dp"
android:background="@color/teal_700" />

12
app/src/main/res/layout/gemtext_title2.xml Normal file
View file

@ -0,0 +1,12 @@
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/text_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="24sp"
android:textStyle="bold"
android:paddingStart="8dp"
android:paddingEnd="8dp"
android:paddingTop="8dp"
android:paddingBottom="4dp"
android:background="@color/teal_700" />

12
app/src/main/res/layout/gemtext_title3.xml Normal file
View file

@ -0,0 +1,12 @@
<?xml version="1.0" encoding="utf-8"?>
<TextView xmlns:android="http://schemas.android.com/apk/res/android"
android:id="@+id/text_view"
android:layout_width="match_parent"
android:layout_height="wrap_content"
android:textSize="18sp"
android:textStyle="bold"
android:paddingStart="8dp"
android:paddingEnd="8dp"
android:paddingTop="8dp"
android:paddingBottom="4dp"
android:background="@color/teal_700" />