Downgrade markwon version and enable LaTeX rendering for messages

dependencies.gradle

@@ -14,7 +14,7 @@ def kotlinCoroutines = "1.5.1"
 def dagger = "2.38.1"
 def retrofit = "2.9.0"
 def arrow = "0.8.2"
-def markwon = "4.6.2"
+def markwon = "4.3.1"
 def moshi = "1.12.0"
 def lifecycle = "2.2.0"
 def rxBinding = "3.1.0"
@@ -90,6 +90,8 @@ ext.libs = [
         ],
         markwon     : [
                 'core'                   : "io.noties.markwon:core:$markwon",
+                'extLatex'               : "io.noties.markwon:ext-latex:$markwon",
+                'inlineParser'           : "io.noties.markwon:inline-parser:$markwon",
                 'html'                   : "io.noties.markwon:html:$markwon"
         ],
         airbnb      : [

vector/build.gradle

@@ -390,6 +390,8 @@ dependencies {
     implementation libs.google.material
     implementation 'me.gujun.android:span:1.7'
     implementation libs.markwon.core
+    implementation libs.markwon.extLatex
+    implementation libs.markwon.inlineParser
     implementation libs.markwon.html
     implementation 'com.googlecode.htmlcompressor:htmlcompressor:1.5.2'
     implementation 'me.saket:better-link-movement-method:2.2.0'

vector/src/main/java/im/vector/app/features/home/room/detail/timeline/factory/MessageItemFactory.kt

@@ -484,6 +484,7 @@ class MessageItemFactory @Inject constructor(
         }
                 .useBigFont(linkifiedBody.length <= MAX_NUMBER_OF_EMOJI_FOR_BIG_FONT * 2 && containsOnlyEmojis(linkifiedBody.toString()))
                 .canUseTextFuture(canUseTextFuture)
+                .markwonPlugins(htmlRenderer.get().plugins)
                 .searchForPills(isFormatted)
                 .previewUrlRetriever(callback?.getPreviewUrlRetriever())
                 .imageContentRenderer(imageContentRenderer)

vector/src/main/java/im/vector/app/features/home/room/detail/timeline/item/MessageTextItem.kt

@@ -16,6 +16,7 @@
 
 package im.vector.app.features.home.room.detail.timeline.item
 
+import android.text.Spanned
 import android.text.method.MovementMethod
 import androidx.appcompat.widget.AppCompatTextView
 import androidx.core.text.PrecomputedTextCompat
@@ -31,6 +32,7 @@ import im.vector.app.features.home.room.detail.timeline.url.PreviewUrlRetriever
 import im.vector.app.features.home.room.detail.timeline.url.PreviewUrlUiState
 import im.vector.app.features.home.room.detail.timeline.url.PreviewUrlView
 import im.vector.app.features.media.ImageContentRenderer
+import io.noties.markwon.MarkwonPlugin
 
 @EpoxyModelClass(layout = R.layout.item_timeline_event_base)
 abstract class MessageTextItem : AbsMessageItem<MessageTextItem.Holder>() {
@@ -59,6 +61,9 @@ abstract class MessageTextItem : AbsMessageItem<MessageTextItem.Holder>() {
     @EpoxyAttribute(EpoxyAttribute.Option.DoNotHash)
     var movementMethod: MovementMethod? = null
 
+    @EpoxyAttribute(EpoxyAttribute.Option.DoNotHash)
+    var markwonPlugins: (List<MarkwonPlugin>)? = null
+
     private val previewUrlViewUpdater = PreviewUrlViewUpdater()
 
     override fun bind(holder: Holder) {
@@ -92,6 +97,7 @@ abstract class MessageTextItem : AbsMessageItem<MessageTextItem.Holder>() {
         } else {
             null
         }
+        markwonPlugins?.forEach { plugin -> plugin.beforeSetText(holder.messageView, message as Spanned) }
         super.bind(holder)
         holder.messageView.movementMethod = movementMethod
 
@@ -104,6 +110,7 @@ abstract class MessageTextItem : AbsMessageItem<MessageTextItem.Holder>() {
         } else {
             holder.messageView.text = message
         }
+        markwonPlugins?.forEach { plugin -> plugin.afterSetText(holder.messageView) }
     }
 
     override fun unbind(holder: Holder) {

vector/src/main/java/im/vector/app/features/html/EventHtmlRenderer.kt

@@ -21,7 +21,11 @@ import android.text.Spannable
 import androidx.core.text.toSpannable
 import im.vector.app.core.resources.ColorProvider
 import io.noties.markwon.Markwon
+import io.noties.markwon.MarkwonPlugin
+import io.noties.markwon.ext.latex.JLatexMathPlugin
+import io.noties.markwon.ext.latex.JLatexMathTheme
 import io.noties.markwon.html.HtmlPlugin
+import io.noties.markwon.inlineparser.MarkwonInlineParserPlugin
 import org.commonmark.node.Node
 import timber.log.Timber
 import javax.inject.Inject
@@ -37,8 +41,15 @@ class EventHtmlRenderer @Inject constructor(htmlConfigure: MatrixHtmlPluginConfi
 
     private val markwon = Markwon.builder(context)
             .usePlugin(HtmlPlugin.create(htmlConfigure))
+            .usePlugin(MarkwonInlineParserPlugin.create())
+            .usePlugin(JLatexMathPlugin.create(44F) { builder ->
+                builder.inlinesEnabled(true)
+                builder.theme().inlinePadding(JLatexMathTheme.Padding.symmetric(24, 8))
+            })
             .build()
 
+    val plugins: List<MarkwonPlugin> = markwon.plugins
+
     fun parse(text: String): Node {
         return markwon.parse(text)
     }