Sample, staic context-aware cache

app-sample/samples.json

@@ -1,4 +1,16 @@
 [
+  {
+    "javaClassName": "io.noties.markwon.app.samples.CacheMarkwonSample",
+    "id": "202007189102458",
+    "title": "Cache Markwon instance",
+    "description": "A static cache for `Markwon` instance to be associated with a `Context`",
+    "artifacts": [
+      "CORE"
+    ],
+    "tags": [
+      "cache"
+    ]
+  },
   {
     "javaClassName": "io.noties.markwon.app.samples.tasklist.TaskListMutateSample",
     "id": "202007184140901",
@@ -756,12 +768,13 @@
     ]
   },
   {
-    "javaClassName": "io.noties.markwon.app.samples.GithubUserIssueOnTextAddedSample",
+    "javaClassName": "io.noties.markwon.app.samples.GithubUserIssueInlineParsingSample",
     "id": "202006181162024",
     "title": "User mention and issue (via text)",
     "description": "Github-like user mention and issue rendering via `CorePlugin.OnTextAddedListener`",
     "artifacts": [
-      "CORE"
+      "CORE",
+      "INLINE_PARSER"
     ],
     "tags": [
       "parsing",
@@ -770,13 +783,12 @@
     ]
   },
   {
-    "javaClassName": "io.noties.markwon.app.samples.GithubUserIssueInlineParsingSample",
+    "javaClassName": "io.noties.markwon.app.samples.GithubUserIssueOnTextAddedSample",
     "id": "202006181162024",
     "title": "User mention and issue (via text)",
     "description": "Github-like user mention and issue rendering via `CorePlugin.OnTextAddedListener`",
     "artifacts": [
-      "CORE",
-      "INLINE_PARSER"
+      "CORE"
     ],
     "tags": [
       "parsing",

app-sample/src/main/java/io/noties/markwon/app/sample/Tags.kt

@@ -33,4 +33,5 @@ object Tags {
     const val html = "HTML"
     const val knownBug = "known-bug"
     const val precomputedText = "precomputed-text"
+    const val cache = "cache"
 }

app-sample/src/main/java/io/noties/markwon/app/samples/CacheMarkwonSample.kt

@@ -0,0 +1,59 @@
+package io.noties.markwon.app.samples
+
+import android.content.Context
+import io.noties.debug.Debug
+import io.noties.markwon.Markwon
+import io.noties.markwon.app.sample.Tags
+import io.noties.markwon.app.sample.ui.MarkwonTextViewSample
+import io.noties.markwon.ext.strikethrough.StrikethroughPlugin
+import io.noties.markwon.sample.annotations.MarkwonArtifact
+import io.noties.markwon.sample.annotations.MarkwonSampleInfo
+import java.util.Collections
+import java.util.WeakHashMap
+
+@MarkwonSampleInfo(
+  id = "202007189102458",
+  title = "Cache Markwon instance",
+  description = "A static cache for `Markwon` instance " +
+    "to be associated with a `Context`",
+  artifacts = [MarkwonArtifact.CORE],
+  tags = [Tags.cache]
+)
+class CacheMarkwonSample : MarkwonTextViewSample() {
+  override fun render() {
+    render("# First!")
+    render("## Second!!")
+    render("### Third!!!")
+  }
+
+  fun render(md: String) {
+    val markwon = MarkwonCache.with(context)
+    Debug.i("markwon: ${markwon.hashCode()}, md: '$md'")
+    markwon.setMarkdown(textView, md)
+  }
+}
+
+object MarkwonCache {
+  private val cache = Collections.synchronizedMap(WeakHashMap<Context, Markwon>())
+
+  fun with(context: Context): Markwon {
+    // yeah, why work as expected? new value is returned each time, no caching occur
+    //  kotlin: 1.3.72
+    //  intellij plugin: 1.3.72-release-Studio4.0-5
+//      return cache.getOrPut(context) {
+//        // create your markwon instance here
+//        return Markwon.builder(context)
+//          .usePlugin(StrikethroughPlugin.create())
+//          .build()
+//      }
+
+    return cache[context] ?: {
+      Markwon.builder(context)
+        .usePlugin(StrikethroughPlugin.create())
+        .build()
+        .also {
+          cache[context] = it
+        }
+    }.invoke()
+  }
+}