Support inline images in the timeline

changelog.d/351.feature

@@ -0,0 +1 @@
+Render inline images in the timeline

dependencies.gradle

@@ -117,6 +117,7 @@ ext.libs = [
         markwon     : [
                 'core'                   : "io.noties.markwon:core:$markwon",
                 'extLatex'               : "io.noties.markwon:ext-latex:$markwon",
+                'imageGlide'             : "io.noties.markwon:image-glide:$markwon",
                 'inlineParser'           : "io.noties.markwon:inline-parser:$markwon",
                 'html'                   : "io.noties.markwon:html:$markwon"
         ],

vector/build.gradle

@@ -452,6 +452,7 @@ dependencies {
     implementation 'me.gujun.android:span:1.7'
     implementation libs.markwon.core
     implementation libs.markwon.extLatex
+    implementation libs.markwon.imageGlide
     implementation libs.markwon.inlineParser
     implementation libs.markwon.html
     implementation 'com.googlecode.htmlcompressor:htmlcompressor:1.5.2'

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

@@ -27,8 +27,13 @@ package im.vector.app.features.html
 
 import android.content.Context
 import android.content.res.Resources
+import android.graphics.drawable.Drawable
 import android.text.Spannable
 import androidx.core.text.toSpannable
+import com.bumptech.glide.Glide
+import com.bumptech.glide.RequestBuilder
+import com.bumptech.glide.request.target.Target
+import im.vector.app.core.di.ActiveSessionHolder
 import im.vector.app.core.resources.ColorProvider
 import im.vector.app.core.utils.DimensionConverter
 import im.vector.app.features.settings.VectorPreferences
@@ -39,12 +44,15 @@ import io.noties.markwon.PrecomputedFutureTextSetterCompat
 import io.noties.markwon.ext.latex.JLatexMathPlugin
 import io.noties.markwon.ext.latex.JLatexMathTheme
 import io.noties.markwon.html.HtmlPlugin
+import io.noties.markwon.image.AsyncDrawable
+import io.noties.markwon.image.glide.GlideImagesPlugin
 import io.noties.markwon.inlineparser.EntityInlineProcessor
 import io.noties.markwon.inlineparser.HtmlInlineProcessor
 import io.noties.markwon.inlineparser.MarkwonInlineParser
 import io.noties.markwon.inlineparser.MarkwonInlineParserPlugin
 import org.commonmark.node.Node
 import org.commonmark.parser.Parser
+import org.matrix.android.sdk.api.MatrixUrls.isMxcUrl
 import timber.log.Timber
 import javax.inject.Inject
 import javax.inject.Singleton
@@ -53,7 +61,8 @@ import javax.inject.Singleton
 class EventHtmlRenderer @Inject constructor(
         htmlConfigure: MatrixHtmlPluginConfigure,
         context: Context,
-        vectorPreferences: VectorPreferences
+        vectorPreferences: VectorPreferences,
+        private val activeSessionHolder: ActiveSessionHolder
 ) {
 
     interface PostProcessor {
@@ -62,6 +71,23 @@ class EventHtmlRenderer @Inject constructor(
 
     private val builder = Markwon.builder(context)
             .usePlugin(HtmlPlugin.create(htmlConfigure))
+            .usePlugin(GlideImagesPlugin.create(object : GlideImagesPlugin.GlideStore {
+                override fun load(drawable: AsyncDrawable): RequestBuilder<Drawable> {
+                    val url = drawable.destination
+                    if (url.isMxcUrl()) {
+                        val contentUrlResolver = activeSessionHolder.getActiveSession().contentUrlResolver()
+                        val imageUrl = contentUrlResolver.resolveFullSize(url)
+                        // Override size to avoid crashes for huge pictures
+                        return Glide.with(context).load(imageUrl).override(500)
+                    }
+                    // We don't want to support other url schemes here, so just return a request for null
+                    return Glide.with(context).load(null as String?)
+                }
+
+                override fun cancel(target: Target<*>) {
+                    Glide.with(context).clear(target)
+                }
+            }))
 
     private val markwon = if (vectorPreferences.latexMathsIsEnabled()) {
         // If latex maths is enabled in app preferences, refomat it so Markwon recognises it