From 13a02f743e14f0e006fbd419f932ec039f2ad74e Mon Sep 17 00:00:00 2001
From: Oleg Bask <obask@users.noreply.github.com>
Date: Sat, 30 Mar 2024 17:14:31 -0700
Subject: [PATCH] Wire up GFM Tables extension

---
 .idea/inspectionProfiles/Project_Default.xml  |  1 +
 gradle/libs.versions.toml                     |  1 +
 markdown/core/api/core.api                    | 23 +++++
 .../jetbrains/jewel/markdown/MarkdownBlock.kt |  6 +-
 .../MarkdownBlockProcessorExtension.kt        |  4 +-
 .../extensions/MarkdownProcessorExtension.kt  |  3 +-
 .../markdown/processing/MarkdownProcessor.kt  |  4 +-
 .../autolink/AutolinkProcessorExtension.kt    |  4 +-
 .../extension/gfm-tables/api/gfm-tables.api   | 35 +++++++
 .../extension/gfm-tables/build.gradle.kts     | 23 +++++
 .../tables/GitHubTableBlockRenderer.kt        | 97 +++++++++++++++++++
 .../tables/GitHubTableProcessorExtension.kt   | 12 +++
 .../tables/GitHubTableRendererExtension.kt    | 14 +++
 .../extensions/tables/TableStyling.kt         | 13 +++
 .../api/int-ui-standalone-styling.api         |  7 ++
 .../build.gradle.kts                          |  1 +
 .../alerts/GitHubTableDefaultStyling.kt       | 20 ++++
 samples/standalone/build.gradle.kts           |  4 +-
 .../view/markdown/MarkdownPreview.kt          | 15 ++-
 settings.gradle.kts                           |  1 +
 20 files changed, 276 insertions(+), 12 deletions(-)
 create mode 100644 markdown/extension/gfm-tables/api/gfm-tables.api
 create mode 100644 markdown/extension/gfm-tables/build.gradle.kts
 create mode 100644 markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/GitHubTableBlockRenderer.kt
 create mode 100644 markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/GitHubTableProcessorExtension.kt
 create mode 100644 markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/GitHubTableRendererExtension.kt
 create mode 100644 markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/TableStyling.kt
 create mode 100644 markdown/int-ui-standalone-styling/src/main/kotlin/org/jetbrains/jewel/intui/markdown/styling/extension/github/alerts/GitHubTableDefaultStyling.kt

diff --git a/.idea/inspectionProfiles/Project_Default.xml b/.idea/inspectionProfiles/Project_Default.xml
index fd1904ab3..7a9999f19 100644
--- a/.idea/inspectionProfiles/Project_Default.xml
+++ b/.idea/inspectionProfiles/Project_Default.xml
@@ -3,6 +3,7 @@
     <option name="myName" value="Project Default" />
     <inspection_tool class="AntMissingPropertiesFileInspection" enabled="false" level="ERROR" enabled_by_default="false" />
     <inspection_tool class="DeprecatedMavenDependency" enabled="false" level="WARNING" enabled_by_default="false" />
+    <inspection_tool class="FunctionName" enabled="false" level="WEAK WARNING" enabled_by_default="false" />
     <inspection_tool class="GradlePackageUpdate" enabled="false" level="WEAK WARNING" enabled_by_default="false" />
     <inspection_tool class="GrazieInspection" enabled="false" level="GRAMMAR_ERROR" enabled_by_default="false" />
     <inspection_tool class="HardwiredNamespacePrefix" enabled="false" level="WARNING" enabled_by_default="false" />
diff --git a/gradle/libs.versions.toml b/gradle/libs.versions.toml
index 5b013282b..0b8fdcb06 100644
--- a/gradle/libs.versions.toml
+++ b/gradle/libs.versions.toml
@@ -17,6 +17,7 @@ poko = "0.13.1"
 [libraries]
 commonmark-core = { module = "org.commonmark:commonmark", version.ref = "commonmark" }
 commonmark-ext-autolink = { module = "org.commonmark:commonmark-ext-autolink", version.ref = "commonmark" }
+commonmark-ext-gfm-tables = { module = "org.commonmark:commonmark-ext-gfm-tables", version.ref = "commonmark" }
 
 filePicker = { module = "com.darkrockstudios:mpfilepicker", version = "3.1.0" }
 
diff --git a/markdown/core/api/core.api b/markdown/core/api/core.api
index e732e11cf..5950bbef3 100644
--- a/markdown/core/api/core.api
+++ b/markdown/core/api/core.api
@@ -233,6 +233,20 @@ public final class org/jetbrains/jewel/markdown/MarkdownBlock$CodeBlock$Indented
 public abstract interface class org/jetbrains/jewel/markdown/MarkdownBlock$CustomBlock : org/jetbrains/jewel/markdown/MarkdownBlock {
 }
 
+public final class org/jetbrains/jewel/markdown/MarkdownBlock$CustomBlock$DefaultCustomBlock : org/jetbrains/jewel/markdown/MarkdownBlock$CustomBlock {
+	public static final synthetic fun box-impl (Lorg/commonmark/node/CustomBlock;)Lorg/jetbrains/jewel/markdown/MarkdownBlock$CustomBlock$DefaultCustomBlock;
+	public static fun constructor-impl (Lorg/commonmark/node/CustomBlock;)Lorg/commonmark/node/CustomBlock;
+	public fun equals (Ljava/lang/Object;)Z
+	public static fun equals-impl (Lorg/commonmark/node/CustomBlock;Ljava/lang/Object;)Z
+	public static final fun equals-impl0 (Lorg/commonmark/node/CustomBlock;Lorg/commonmark/node/CustomBlock;)Z
+	public final fun getNativeBlock ()Lorg/commonmark/node/CustomBlock;
+	public fun hashCode ()I
+	public static fun hashCode-impl (Lorg/commonmark/node/CustomBlock;)I
+	public fun toString ()Ljava/lang/String;
+	public static fun toString-impl (Lorg/commonmark/node/CustomBlock;)Ljava/lang/String;
+	public final synthetic fun unbox-impl ()Lorg/commonmark/node/CustomBlock;
+}
+
 public final class org/jetbrains/jewel/markdown/MarkdownBlock$Heading : org/jetbrains/jewel/markdown/BlockWithInlineMarkdown, org/jetbrains/jewel/markdown/MarkdownBlock {
 	public static final synthetic fun box-impl (Lorg/commonmark/node/Heading;)Lorg/jetbrains/jewel/markdown/MarkdownBlock$Heading;
 	public static fun constructor-impl (Lorg/commonmark/node/Heading;)Lorg/commonmark/node/Heading;
@@ -406,6 +420,11 @@ public abstract interface class org/jetbrains/jewel/markdown/extensions/Markdown
 	public abstract fun processMarkdownBlock (Lorg/commonmark/node/CustomBlock;Lorg/jetbrains/jewel/markdown/processing/MarkdownProcessor;)Lorg/jetbrains/jewel/markdown/MarkdownBlock$CustomBlock;
 }
 
+public final class org/jetbrains/jewel/markdown/extensions/MarkdownBlockProcessorExtension$DefaultImpls {
+	public static fun canProcess (Lorg/jetbrains/jewel/markdown/extensions/MarkdownBlockProcessorExtension;Lorg/commonmark/node/CustomBlock;)Z
+	public static fun processMarkdownBlock (Lorg/jetbrains/jewel/markdown/extensions/MarkdownBlockProcessorExtension;Lorg/commonmark/node/CustomBlock;Lorg/jetbrains/jewel/markdown/processing/MarkdownProcessor;)Lorg/jetbrains/jewel/markdown/MarkdownBlock$CustomBlock;
+}
+
 public abstract interface class org/jetbrains/jewel/markdown/extensions/MarkdownBlockRendererExtension {
 	public abstract fun canRender (Lorg/jetbrains/jewel/markdown/MarkdownBlock$CustomBlock;)Z
 	public abstract fun render (Lorg/jetbrains/jewel/markdown/MarkdownBlock$CustomBlock;Lorg/jetbrains/jewel/markdown/rendering/MarkdownBlockRenderer;Lorg/jetbrains/jewel/markdown/rendering/InlineMarkdownRenderer;Landroidx/compose/runtime/Composer;I)V
@@ -417,6 +436,10 @@ public abstract interface class org/jetbrains/jewel/markdown/extensions/Markdown
 	public abstract fun getTextRendererExtension ()Lorg/commonmark/renderer/text/TextContentRenderer$TextContentRendererExtension;
 }
 
+public final class org/jetbrains/jewel/markdown/extensions/MarkdownProcessorExtension$DefaultImpls {
+	public static fun getProcessorExtension (Lorg/jetbrains/jewel/markdown/extensions/MarkdownProcessorExtension;)Lorg/jetbrains/jewel/markdown/extensions/MarkdownBlockProcessorExtension;
+}
+
 public abstract interface class org/jetbrains/jewel/markdown/extensions/MarkdownRendererExtension {
 	public abstract fun getBlockRenderer ()Lorg/jetbrains/jewel/markdown/extensions/MarkdownBlockRendererExtension;
 }
diff --git a/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/MarkdownBlock.kt b/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/MarkdownBlock.kt
index 1b7ccdb32..503deeaee 100644
--- a/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/MarkdownBlock.kt
+++ b/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/MarkdownBlock.kt
@@ -1,6 +1,7 @@
 package org.jetbrains.jewel.markdown
 
 import org.commonmark.node.Block
+import org.commonmark.node.CustomBlock as CMCustomBlock
 import org.commonmark.node.Heading as CMHeading
 import org.commonmark.node.Paragraph as CMParagraph
 
@@ -22,7 +23,10 @@ public sealed interface MarkdownBlock {
         ) : CodeBlock
     }
 
-    public interface CustomBlock : MarkdownBlock
+    public interface CustomBlock : MarkdownBlock {
+        @JvmInline
+        public value class DefaultCustomBlock(public val nativeBlock: CMCustomBlock) : CustomBlock
+    }
 
     @JvmInline
     public value class Heading(
diff --git a/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/MarkdownBlockProcessorExtension.kt b/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/MarkdownBlockProcessorExtension.kt
index 860797a7b..378aeee52 100644
--- a/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/MarkdownBlockProcessorExtension.kt
+++ b/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/MarkdownBlockProcessorExtension.kt
@@ -11,7 +11,7 @@ public interface MarkdownBlockProcessorExtension {
      *
      * @param block The [CustomBlock] to parse
      */
-    public fun canProcess(block: CustomBlock): Boolean
+    public fun canProcess(block: CustomBlock): Boolean = false
 
     /**
      * Processes the [block] as a [MarkdownBlock.CustomBlock], if possible. Note
@@ -19,5 +19,5 @@ public interface MarkdownBlockProcessorExtension {
      * [block], as implementations might throw an exception for unsupported
      * block types.
      */
-    public fun processMarkdownBlock(block: CustomBlock, processor: MarkdownProcessor): MarkdownBlock.CustomBlock?
+    public fun processMarkdownBlock(block: CustomBlock, processor: MarkdownProcessor): MarkdownBlock.CustomBlock? = null
 }
diff --git a/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/MarkdownProcessorExtension.kt b/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/MarkdownProcessorExtension.kt
index 039f5c895..31470140e 100644
--- a/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/MarkdownProcessorExtension.kt
+++ b/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/MarkdownProcessorExtension.kt
@@ -32,5 +32,6 @@ public interface MarkdownProcessorExtension {
      * is already be handled by [org.jetbrains.jewel.markdown.processing.MarkdownProcessor]
      * or another [org.jetbrains.jewel.markdown.extensions.MarkdownProcessorExtension].
      */
-    public val processorExtension: MarkdownBlockProcessorExtension?
+    public val processorExtension: MarkdownBlockProcessorExtension
+        get() = object : MarkdownBlockProcessorExtension {}
 }
diff --git a/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/processing/MarkdownProcessor.kt b/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/processing/MarkdownProcessor.kt
index 7c39b704f..8fc02dff8 100644
--- a/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/processing/MarkdownProcessor.kt
+++ b/markdown/core/src/main/kotlin/org/jetbrains/jewel/markdown/processing/MarkdownProcessor.kt
@@ -23,6 +23,7 @@ import org.jetbrains.jewel.foundation.ExperimentalJewelApi
 import org.jetbrains.jewel.markdown.InlineMarkdown
 import org.jetbrains.jewel.markdown.MarkdownBlock
 import org.jetbrains.jewel.markdown.MarkdownBlock.CodeBlock
+import org.jetbrains.jewel.markdown.MarkdownBlock.CustomBlock.DefaultCustomBlock
 import org.jetbrains.jewel.markdown.MarkdownBlock.ListBlock
 import org.jetbrains.jewel.markdown.MimeType
 import org.jetbrains.jewel.markdown.extensions.MarkdownProcessorExtension
@@ -189,8 +190,9 @@ public class MarkdownProcessor(
             is ThematicBreak -> MarkdownBlock.ThematicBreak
             is HtmlBlock -> toMarkdownHtmlBlockOrNull()
             is CustomBlock -> {
-                extensions.find { it.processorExtension?.canProcess(this) == true }
+                extensions.find { it.processorExtension.canProcess(this) }
                     ?.processorExtension?.processMarkdownBlock(this, this@MarkdownProcessor)
+                    ?: DefaultCustomBlock(this)
             }
 
             else -> null
diff --git a/markdown/extension/autolink/src/main/kotlin/org/jetbrains/jewel/markdown/extension/autolink/AutolinkProcessorExtension.kt b/markdown/extension/autolink/src/main/kotlin/org/jetbrains/jewel/markdown/extension/autolink/AutolinkProcessorExtension.kt
index ad8161dea..bb759c391 100644
--- a/markdown/extension/autolink/src/main/kotlin/org/jetbrains/jewel/markdown/extension/autolink/AutolinkProcessorExtension.kt
+++ b/markdown/extension/autolink/src/main/kotlin/org/jetbrains/jewel/markdown/extension/autolink/AutolinkProcessorExtension.kt
@@ -3,10 +3,10 @@ package org.jetbrains.jewel.markdown.extension.autolink
 import org.commonmark.ext.autolink.AutolinkExtension
 import org.commonmark.parser.Parser.ParserExtension
 import org.commonmark.renderer.text.TextContentRenderer
-import org.jetbrains.jewel.markdown.extensions.MarkdownBlockProcessorExtension
 import org.jetbrains.jewel.markdown.extensions.MarkdownProcessorExtension
 
 public object AutolinkProcessorExtension : MarkdownProcessorExtension {
+
     override val parserExtension: ParserExtension
         get() = AutolinkExtension.create() as ParserExtension
 
@@ -15,6 +15,4 @@ public object AutolinkProcessorExtension : MarkdownProcessorExtension {
      */
     override val textRendererExtension: TextContentRenderer.TextContentRendererExtension?
         get() = null
-    override val processorExtension: MarkdownBlockProcessorExtension?
-        get() = null
 }
diff --git a/markdown/extension/gfm-tables/api/gfm-tables.api b/markdown/extension/gfm-tables/api/gfm-tables.api
new file mode 100644
index 000000000..871a0a451
--- /dev/null
+++ b/markdown/extension/gfm-tables/api/gfm-tables.api
@@ -0,0 +1,35 @@
+public final class org/jetbrains/jewel/markdown/extensions/tables/GitHubTableBlockRenderer : org/jetbrains/jewel/markdown/extensions/MarkdownBlockRendererExtension {
+	public static final field $stable I
+	public fun <init> (Lorg/jetbrains/jewel/markdown/extensions/tables/TableStyling;Lorg/jetbrains/jewel/markdown/rendering/MarkdownStyling;)V
+	public fun canRender (Lorg/jetbrains/jewel/markdown/MarkdownBlock$CustomBlock;)Z
+	public fun render (Lorg/jetbrains/jewel/markdown/MarkdownBlock$CustomBlock;Lorg/jetbrains/jewel/markdown/rendering/MarkdownBlockRenderer;Lorg/jetbrains/jewel/markdown/rendering/InlineMarkdownRenderer;Landroidx/compose/runtime/Composer;I)V
+}
+
+public final class org/jetbrains/jewel/markdown/extensions/tables/GitHubTableProcessorExtension : org/jetbrains/jewel/markdown/extensions/MarkdownProcessorExtension {
+	public static final field $stable I
+	public static final field INSTANCE Lorg/jetbrains/jewel/markdown/extensions/tables/GitHubTableProcessorExtension;
+	public fun getParserExtension ()Lorg/commonmark/parser/Parser$ParserExtension;
+	public fun getProcessorExtension ()Lorg/jetbrains/jewel/markdown/extensions/MarkdownBlockProcessorExtension;
+	public fun getTextRendererExtension ()Lorg/commonmark/renderer/text/TextContentRenderer$TextContentRendererExtension;
+}
+
+public final class org/jetbrains/jewel/markdown/extensions/tables/GitHubTableRendererExtension : org/jetbrains/jewel/markdown/extensions/MarkdownRendererExtension {
+	public static final field $stable I
+	public fun <init> (Lorg/jetbrains/jewel/markdown/extensions/tables/TableStyling;Lorg/jetbrains/jewel/markdown/rendering/MarkdownStyling;)V
+	public fun getBlockRenderer ()Lorg/jetbrains/jewel/markdown/extensions/MarkdownBlockRendererExtension;
+}
+
+public final class org/jetbrains/jewel/markdown/extensions/tables/TableStyling {
+	public static final field $stable I
+	public static final field Companion Lorg/jetbrains/jewel/markdown/extensions/tables/TableStyling$Companion;
+	public synthetic fun <init> (JJLkotlin/jvm/internal/DefaultConstructorMarker;)V
+	public fun equals (Ljava/lang/Object;)Z
+	public final fun getBorderColor-0d7_KjU ()J
+	public final fun getHeadColor-0d7_KjU ()J
+	public fun hashCode ()I
+	public fun toString ()Ljava/lang/String;
+}
+
+public final class org/jetbrains/jewel/markdown/extensions/tables/TableStyling$Companion {
+}
+
diff --git a/markdown/extension/gfm-tables/build.gradle.kts b/markdown/extension/gfm-tables/build.gradle.kts
new file mode 100644
index 000000000..6503f2df6
--- /dev/null
+++ b/markdown/extension/gfm-tables/build.gradle.kts
@@ -0,0 +1,23 @@
+plugins {
+    jewel
+    `jewel-publish`
+    `jewel-check-public-api`
+    alias(libs.plugins.composeDesktop)
+}
+
+dependencies {
+    implementation(projects.markdown.core)
+    implementation(libs.commonmark.ext.gfm.tables)
+
+    testImplementation(compose.desktop.uiTestJUnit4)
+}
+
+publicApiValidation {
+    // TODO Oleg remove this once migrated to value classes
+    excludedClassRegexes = setOf("org.jetbrains.jewel.markdown.extensions.github.alerts.*")
+}
+
+publishing.publications.named<MavenPublication>("main") {
+    val ijpTarget = project.property("ijp.target") as String
+    artifactId = "jewel-markdown-extension-${project.name}-$ijpTarget"
+}
diff --git a/markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/GitHubTableBlockRenderer.kt b/markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/GitHubTableBlockRenderer.kt
new file mode 100644
index 000000000..ec203def9
--- /dev/null
+++ b/markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/GitHubTableBlockRenderer.kt
@@ -0,0 +1,97 @@
+package org.jetbrains.jewel.markdown.extensions.tables
+
+import androidx.compose.foundation.background
+import androidx.compose.foundation.border
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.Row
+import androidx.compose.foundation.layout.RowScope
+import androidx.compose.foundation.layout.fillMaxSize
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import androidx.compose.ui.unit.dp
+import org.commonmark.ext.gfm.tables.TableBlock
+import org.commonmark.ext.gfm.tables.TableBody
+import org.commonmark.ext.gfm.tables.TableHead
+import org.commonmark.node.Node
+import org.jetbrains.jewel.markdown.InlineMarkdown
+import org.jetbrains.jewel.markdown.MarkdownBlock.CustomBlock
+import org.jetbrains.jewel.markdown.extensions.MarkdownBlockRendererExtension
+import org.jetbrains.jewel.markdown.rendering.InlineMarkdownRenderer
+import org.jetbrains.jewel.markdown.rendering.MarkdownBlockRenderer
+import org.jetbrains.jewel.markdown.rendering.MarkdownStyling
+import org.jetbrains.jewel.markdown.toInlineNode
+import org.jetbrains.jewel.ui.component.Text
+
+public class GitHubTableBlockRenderer(
+    private val styling: TableStyling,
+    private val rootStyling: MarkdownStyling,
+) : MarkdownBlockRendererExtension {
+
+    override fun canRender(block: CustomBlock): Boolean =
+        block is CustomBlock.DefaultCustomBlock && block.nativeBlock is TableBlock
+
+    @Composable
+    private fun RowScope.TableCell(
+        text: List<InlineMarkdown>,
+        inlineRenderer: InlineMarkdownRenderer,
+    ) {
+        Text(
+            text = inlineRenderer.renderAsAnnotatedString(text, rootStyling.paragraph.inlinesStyling),
+            Modifier
+                .border(1.dp, styling.borderColor)
+                .weight(1.0f)
+                .padding(8.dp),
+        )
+    }
+
+    @Composable
+    override fun render(
+        block: CustomBlock,
+        blockRenderer: MarkdownBlockRenderer,
+        inlineRenderer: InlineMarkdownRenderer,
+    ) {
+        if (block !is CustomBlock.DefaultCustomBlock) return
+
+        val head = block.nativeBlock.firstChild as TableHead
+        val body = block.nativeBlock.lastChild as TableBody
+
+        Column(Modifier.fillMaxSize().padding(16.dp)) {
+            head.forEachChild { row ->
+                Row(Modifier.background(styling.headColor)) {
+                    row.forEachChild { cell ->
+                        TableCell(text = cell.children().map { it.toInlineNode() }, inlineRenderer)
+                    }
+                }
+            }
+            body.forEachChild { row ->
+                Row(Modifier.fillMaxWidth()) {
+                    row.forEachChild { cell ->
+                        TableCell(text = cell.children().map { it.toInlineNode() }, inlineRenderer)
+                    }
+                }
+            }
+        }
+    }
+
+    @Composable
+    private fun Node.children(): List<Node> = buildList {
+        var child = firstChild
+
+        while (child != null) {
+            add(child)
+            child = child.next
+        }
+    }
+}
+
+@Composable
+private fun Node.forEachChild(action: @Composable (Node) -> Unit) {
+    var child = firstChild
+
+    while (child != null) {
+        action(child)
+        child = child.next
+    }
+}
diff --git a/markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/GitHubTableProcessorExtension.kt b/markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/GitHubTableProcessorExtension.kt
new file mode 100644
index 000000000..eb36ab896
--- /dev/null
+++ b/markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/GitHubTableProcessorExtension.kt
@@ -0,0 +1,12 @@
+package org.jetbrains.jewel.markdown.extensions.tables
+
+import org.commonmark.ext.gfm.tables.TablesExtension
+import org.commonmark.parser.Parser.ParserExtension
+import org.commonmark.renderer.text.TextContentRenderer.TextContentRendererExtension
+import org.jetbrains.jewel.markdown.extensions.MarkdownProcessorExtension
+
+public object GitHubTableProcessorExtension : MarkdownProcessorExtension {
+
+    override val parserExtension: ParserExtension = TablesExtension.create() as ParserExtension
+    override val textRendererExtension: TextContentRendererExtension = TablesExtension.create() as TextContentRendererExtension
+}
diff --git a/markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/GitHubTableRendererExtension.kt b/markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/GitHubTableRendererExtension.kt
new file mode 100644
index 000000000..6f4ae9d6f
--- /dev/null
+++ b/markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/GitHubTableRendererExtension.kt
@@ -0,0 +1,14 @@
+package org.jetbrains.jewel.markdown.extensions.tables
+
+import org.jetbrains.jewel.markdown.extensions.MarkdownBlockRendererExtension
+import org.jetbrains.jewel.markdown.extensions.MarkdownRendererExtension
+import org.jetbrains.jewel.markdown.rendering.MarkdownStyling
+
+public class GitHubTableRendererExtension(
+    alertStyling: TableStyling,
+    rootStyling: MarkdownStyling,
+) : MarkdownRendererExtension {
+
+    override val blockRenderer: MarkdownBlockRendererExtension =
+        GitHubTableBlockRenderer(alertStyling, rootStyling)
+}
diff --git a/markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/TableStyling.kt b/markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/TableStyling.kt
new file mode 100644
index 000000000..0ef64ef57
--- /dev/null
+++ b/markdown/extension/gfm-tables/src/main/kotlin/org/jetbrains/jewel/markdown/extensions/tables/TableStyling.kt
@@ -0,0 +1,13 @@
+package org.jetbrains.jewel.markdown.extensions.tables
+
+import androidx.compose.ui.graphics.Color
+import org.jetbrains.jewel.foundation.GenerateDataFunctions
+
+@GenerateDataFunctions
+public class TableStyling(
+    public val headColor: Color,
+    public val borderColor: Color,
+) {
+
+    public companion object
+}
diff --git a/markdown/int-ui-standalone-styling/api/int-ui-standalone-styling.api b/markdown/int-ui-standalone-styling/api/int-ui-standalone-styling.api
index c70cd0973..8eafd826f 100644
--- a/markdown/int-ui-standalone-styling/api/int-ui-standalone-styling.api
+++ b/markdown/int-ui-standalone-styling/api/int-ui-standalone-styling.api
@@ -113,3 +113,10 @@ public final class org/jetbrains/jewel/intui/markdown/styling/extension/github/a
 	public static synthetic fun light-gaOEZmc$default (Lorg/jetbrains/jewel/markdown/extensions/github/alerts/WarningAlertStyling$Companion;Landroidx/compose/foundation/layout/PaddingValues;FJLandroidx/compose/ui/graphics/PathEffect;ILandroidx/compose/ui/text/TextStyle;Ljava/lang/String;JJILjava/lang/Object;)Lorg/jetbrains/jewel/markdown/extensions/github/alerts/WarningAlertStyling;
 }
 
+public final class org/jetbrains/jewel/intui/markdown/styling/extension/github/alerts/GitHubTableDefaultStylingKt {
+	public static final fun dark-WkMS-hQ (Lorg/jetbrains/jewel/markdown/extensions/tables/TableStyling$Companion;JJ)Lorg/jetbrains/jewel/markdown/extensions/tables/TableStyling;
+	public static synthetic fun dark-WkMS-hQ$default (Lorg/jetbrains/jewel/markdown/extensions/tables/TableStyling$Companion;JJILjava/lang/Object;)Lorg/jetbrains/jewel/markdown/extensions/tables/TableStyling;
+	public static final fun light-WkMS-hQ (Lorg/jetbrains/jewel/markdown/extensions/tables/TableStyling$Companion;JJ)Lorg/jetbrains/jewel/markdown/extensions/tables/TableStyling;
+	public static synthetic fun light-WkMS-hQ$default (Lorg/jetbrains/jewel/markdown/extensions/tables/TableStyling$Companion;JJILjava/lang/Object;)Lorg/jetbrains/jewel/markdown/extensions/tables/TableStyling;
+}
+
diff --git a/markdown/int-ui-standalone-styling/build.gradle.kts b/markdown/int-ui-standalone-styling/build.gradle.kts
index 57a0ae2ae..17dbdb446 100644
--- a/markdown/int-ui-standalone-styling/build.gradle.kts
+++ b/markdown/int-ui-standalone-styling/build.gradle.kts
@@ -9,6 +9,7 @@ dependencies {
     api(projects.markdown.core)
     api(projects.intUi.intUiStandalone)
     compileOnly(projects.markdown.extension.gfmAlerts)
+    compileOnly(projects.markdown.extension.gfmTables)
 
     testImplementation(compose.desktop.uiTestJUnit4)
 }
diff --git a/markdown/int-ui-standalone-styling/src/main/kotlin/org/jetbrains/jewel/intui/markdown/styling/extension/github/alerts/GitHubTableDefaultStyling.kt b/markdown/int-ui-standalone-styling/src/main/kotlin/org/jetbrains/jewel/intui/markdown/styling/extension/github/alerts/GitHubTableDefaultStyling.kt
new file mode 100644
index 000000000..d32fd8dbd
--- /dev/null
+++ b/markdown/int-ui-standalone-styling/src/main/kotlin/org/jetbrains/jewel/intui/markdown/styling/extension/github/alerts/GitHubTableDefaultStyling.kt
@@ -0,0 +1,20 @@
+package org.jetbrains.jewel.intui.markdown.styling.extension.github.alerts
+
+import androidx.compose.ui.graphics.Color
+import org.jetbrains.jewel.markdown.extensions.tables.TableStyling
+
+public fun TableStyling.Companion.dark(
+    headColor: Color = Color.DarkGray,
+    borderColor: Color = Color.Gray,
+): TableStyling = TableStyling(
+    headColor,
+    borderColor,
+)
+
+public fun TableStyling.Companion.light(
+    headColor: Color = Color.LightGray,
+    borderColor: Color = Color.Gray,
+): TableStyling = TableStyling(
+    headColor,
+    borderColor,
+)
diff --git a/samples/standalone/build.gradle.kts b/samples/standalone/build.gradle.kts
index 2d8714780..c3028a4b9 100644
--- a/samples/standalone/build.gradle.kts
+++ b/samples/standalone/build.gradle.kts
@@ -13,8 +13,10 @@ dependencies {
     implementation(projects.intUi.intUiStandalone)
     implementation(projects.intUi.intUiDecoratedWindow)
     implementation(projects.markdown.intUiStandaloneStyling)
-    implementation(projects.markdown.extension.gfmAlerts)
     implementation(projects.markdown.extension.autolink)
+    implementation(projects.markdown.extension.gfmAlerts)
+    implementation(projects.markdown.extension.gfmTables)
+
     implementation(compose.desktop.currentOs) {
         exclude(group = "org.jetbrains.compose.material")
     }
diff --git a/samples/standalone/src/main/kotlin/org/jetbrains/jewel/samples/standalone/view/markdown/MarkdownPreview.kt b/samples/standalone/src/main/kotlin/org/jetbrains/jewel/samples/standalone/view/markdown/MarkdownPreview.kt
index f3f6aba6e..8c5dccafc 100644
--- a/samples/standalone/src/main/kotlin/org/jetbrains/jewel/samples/standalone/view/markdown/MarkdownPreview.kt
+++ b/samples/standalone/src/main/kotlin/org/jetbrains/jewel/samples/standalone/view/markdown/MarkdownPreview.kt
@@ -35,6 +35,9 @@ import org.jetbrains.jewel.markdown.extension.autolink.AutolinkProcessorExtensio
 import org.jetbrains.jewel.markdown.extensions.github.alerts.AlertStyling
 import org.jetbrains.jewel.markdown.extensions.github.alerts.GitHubAlertProcessorExtension
 import org.jetbrains.jewel.markdown.extensions.github.alerts.GitHubAlertRendererExtension
+import org.jetbrains.jewel.markdown.extensions.tables.GitHubTableProcessorExtension
+import org.jetbrains.jewel.markdown.extensions.tables.GitHubTableRendererExtension
+import org.jetbrains.jewel.markdown.extensions.tables.TableStyling
 import org.jetbrains.jewel.markdown.processing.MarkdownProcessor
 import org.jetbrains.jewel.markdown.rendering.InlineMarkdownRenderer
 import org.jetbrains.jewel.markdown.rendering.MarkdownBlockRenderer
@@ -54,7 +57,7 @@ internal fun MarkdownPreview(
         remember(isDark) { if (isDark) MarkdownStyling.dark() else MarkdownStyling.light() }
 
     var markdownBlocks by remember { mutableStateOf(emptyList<MarkdownBlock>()) }
-    val extensions = listOf(GitHubAlertProcessorExtension, AutolinkProcessorExtension)
+    val extensions = listOf(GitHubAlertProcessorExtension, GitHubTableProcessorExtension, AutolinkProcessorExtension)
     val processor = remember { MarkdownProcessor(extensions) }
 
     LaunchedEffect(rawMarkdown) {
@@ -69,7 +72,10 @@ internal fun MarkdownPreview(
             if (isDark) {
                 MarkdownBlockRenderer.dark(
                     styling = markdownStyling,
-                    rendererExtensions = listOf(GitHubAlertRendererExtension(AlertStyling.dark(), markdownStyling)),
+                    rendererExtensions = listOf(
+                        GitHubAlertRendererExtension(AlertStyling.dark(), markdownStyling),
+                        GitHubTableRendererExtension(TableStyling.dark(), markdownStyling),
+                    ),
                     inlineRenderer = InlineMarkdownRenderer.default(extensions),
                 ) { url ->
                     Desktop.getDesktop().browse(URI.create(url))
@@ -77,7 +83,10 @@ internal fun MarkdownPreview(
             } else {
                 MarkdownBlockRenderer.light(
                     styling = markdownStyling,
-                    rendererExtensions = listOf(GitHubAlertRendererExtension(AlertStyling.light(), markdownStyling)),
+                    rendererExtensions = listOf(
+                        GitHubAlertRendererExtension(AlertStyling.light(), markdownStyling),
+                        GitHubTableRendererExtension(TableStyling.light(), markdownStyling),
+                    ),
                     inlineRenderer = InlineMarkdownRenderer.default(extensions),
                 ) { url ->
                     Desktop.getDesktop().browse(URI.create(url))
diff --git a/settings.gradle.kts b/settings.gradle.kts
index 69a2b6a3e..b68810659 100644
--- a/settings.gradle.kts
+++ b/settings.gradle.kts
@@ -38,6 +38,7 @@ include(
     ":markdown:core",
     ":markdown:extension:autolink",
     ":markdown:extension:gfm-alerts",
+    ":markdown:extension:gfm-tables",
     ":markdown:int-ui-standalone-styling",
     ":markdown:ide-laf-bridge-styling",
     ":samples:ide-plugin",