Add custom block rendering

README.md

@@ -4,11 +4,11 @@
 [![GitHub license](https://img.shields.io/badge/license-Apache%20License%202.0-blue.svg?style=flat)](https://www.apache.org/licenses/LICENSE-2.0)
 
 > **Warning**
-> compose-richtext library and all its modules are very experimental and undermaintained. The roadmap is unclear at the moment. Thanks for your patience. Fork option is available as always.
+> compose-richtext library and all its modules are very experimental. The roadmap is unclear at the moment. Thanks for your patience. Fork option is available as always.
 
 A collection of Compose libraries for working with rich text formatting and documents.
 
-`richtext-ui`, `richtext-commonmark`, and `richtext-material-ui` are Kotlin Multiplatform Compose Libraries.
+Aside from `printing`, and `slideshow`, all modules are Kotlin Multiplatform Compose Libraries.
 
 This repo is currently very experimental and really just proofs-of-concept: there are no tests and some things
 might be broken or very non-performant.

android-sample/build.gradle.kts

@@ -2,6 +2,7 @@ plugins {
   id("com.android.application")
   kotlin("android")
   id("org.jetbrains.compose") version Compose.desktopVersion
+  id("org.jetbrains.kotlin.plugin.compose") version Kotlin.version
 }
 
 android {
@@ -24,10 +25,6 @@ android {
   kotlinOptions {
     jvmTarget = "11"
   }
-
-  composeOptions {
-    kotlinCompilerExtensionVersion = Compose.compilerVersion
-  }
 }
 
 dependencies {

android-sample/src/main/java/com/zachklipp/richtext/sample/LazyMarkdownSample.kt

@@ -18,6 +18,7 @@ import androidx.compose.material3.Text
 import androidx.compose.material3.darkColorScheme
 import androidx.compose.material3.lightColorScheme
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
@@ -27,10 +28,12 @@ import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.platform.LocalDensity
+import androidx.compose.ui.platform.LocalUriHandler
+import androidx.compose.ui.platform.UriHandler
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
+import com.halilibo.richtext.commonmark.CommonMarkdownParseOptions
 import com.halilibo.richtext.commonmark.CommonmarkAstNodeParser
-import com.halilibo.richtext.commonmark.MarkdownParseOptions
 import com.halilibo.richtext.markdown.BasicMarkdown
 import com.halilibo.richtext.markdown.node.AstDocument
 import com.halilibo.richtext.markdown.node.AstNode
@@ -50,7 +53,7 @@ import com.halilibo.richtext.ui.resolveDefaults
   var richTextStyle by remember { mutableStateOf(RichTextStyle().resolveDefaults()) }
   var isDarkModeEnabled by remember { mutableStateOf(false) }
   var isWordWrapEnabled by remember { mutableStateOf(true) }
-  var markdownParseOptions by remember { mutableStateOf(MarkdownParseOptions.Default) }
+  var markdownParseOptions by remember { mutableStateOf(CommonMarkdownParseOptions.Default) }
   var isAutolinkEnabled by remember { mutableStateOf(true) }
 
   LaunchedEffect(isWordWrapEnabled) {
@@ -115,14 +118,13 @@ import com.halilibo.richtext.ui.resolveDefaults
             parser.parse(sampleMarkdown)
           }
 
-          RichText(
-            style = richTextStyle,
-            linkClickHandler = {
-              Toast.makeText(context, it, Toast.LENGTH_SHORT).show()
-            },
-            modifier = Modifier.padding(8.dp),
-          ) {
-            LazyMarkdown(astNode)
+          ProvideToastUriHandler(context) {
+            RichText(
+              style = richTextStyle,
+              modifier = Modifier.padding(8.dp),
+            ) {
+              LazyMarkdown(astNode)
+            }
           }
         }
       }

android-sample/src/main/java/com/zachklipp/richtext/sample/MarkdownSample.kt

@@ -32,9 +32,16 @@ import androidx.compose.ui.platform.LocalLayoutDirection
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.LayoutDirection
 import androidx.compose.ui.unit.dp
+import androidx.compose.ui.unit.sp
+import com.halilibo.richtext.commonmark.CommonMarkdownParseOptions
 import com.halilibo.richtext.commonmark.CommonmarkAstNodeParser
-import com.halilibo.richtext.commonmark.MarkdownParseOptions
+import com.halilibo.richtext.markdown.AstBlockNodeComposer
 import com.halilibo.richtext.markdown.BasicMarkdown
+import com.halilibo.richtext.markdown.node.AstBlockNodeType
+import com.halilibo.richtext.markdown.node.AstHeading
+import com.halilibo.richtext.markdown.node.AstNode
+import com.halilibo.richtext.ui.Heading
+import com.halilibo.richtext.ui.RichTextScope
 import com.halilibo.richtext.ui.RichTextStyle
 import com.halilibo.richtext.ui.material3.RichText
 import com.halilibo.richtext.ui.resolveDefaults
@@ -49,7 +56,7 @@ import com.halilibo.richtext.ui.resolveDefaults
   var richTextStyle by remember { mutableStateOf(RichTextStyle().resolveDefaults()) }
   var isDarkModeEnabled by remember { mutableStateOf(false) }
   var isWordWrapEnabled by remember { mutableStateOf(true) }
-  var markdownParseOptions by remember { mutableStateOf(MarkdownParseOptions.Default) }
+  var markdownParseOptions by remember { mutableStateOf(CommonMarkdownParseOptions.Default) }
   var isAutolinkEnabled by remember { mutableStateOf(true) }
   var isRtl by remember { mutableStateOf(false) }
 
@@ -126,14 +133,13 @@ import com.halilibo.richtext.ui.resolveDefaults
                 parser.parse(sampleMarkdown)
               }
 
-              RichText(
-                style = richTextStyle,
-                linkClickHandler = {
-                  Toast.makeText(context, it, Toast.LENGTH_SHORT).show()
-                },
-                modifier = Modifier.padding(8.dp),
-              ) {
-                BasicMarkdown(astNode)
+              ProvideToastUriHandler(context) {
+                RichText(
+                  style = richTextStyle,
+                  modifier = Modifier.padding(8.dp),
+                ) {
+                  BasicMarkdown(astNode, HeadingAstBlockNodeComposer)
+                }
               }
             }
           }
@@ -143,6 +149,25 @@ import com.halilibo.richtext.ui.resolveDefaults
   }
 }
 
+val HeadingAstBlockNodeComposer = object : AstBlockNodeComposer {
+  override fun predicate(astBlockNodeType: AstBlockNodeType): Boolean {
+    return astBlockNodeType is AstHeading
+  }
+
+  @Composable override fun RichTextScope.Compose(
+    astNode: AstNode,
+    visitChildren: @Composable (AstNode) -> Unit
+  ) {
+    val headingNode = astNode.type as? AstHeading ?: return
+    Column {
+      Heading(level = headingNode.level) {
+        visitChildren(astNode)
+      }
+      Text("Custom rendering is used for this heading!", fontSize = 8.sp)
+    }
+  }
+}
+
 @Composable
 private fun CheckboxPreference(
   onClick: () -> Unit,

android-sample/src/main/java/com/zachklipp/richtext/sample/RichTextSample.kt

@@ -1,6 +1,8 @@
 package com.zachklipp.richtext.sample
 
+import androidx.annotation.IntRange
 import androidx.compose.foundation.clickable
+import androidx.compose.foundation.interaction.MutableInteractionSource
 import androidx.compose.foundation.layout.Arrangement
 import androidx.compose.foundation.layout.Column
 import androidx.compose.foundation.layout.Row
@@ -11,7 +13,10 @@ import androidx.compose.foundation.verticalScroll
 import androidx.compose.material3.Card
 import androidx.compose.material3.CardDefaults
 import androidx.compose.material3.Checkbox
+import androidx.compose.material3.ExperimentalMaterial3Api
 import androidx.compose.material3.Slider
+import androidx.compose.material3.SliderColors
+import androidx.compose.material3.SliderDefaults
 import androidx.compose.material3.Surface
 import androidx.compose.material3.Text
 import androidx.compose.material3.darkColorScheme
@@ -24,6 +29,7 @@ import androidx.compose.runtime.setValue
 import androidx.compose.ui.Alignment
 import androidx.compose.ui.Modifier
 import androidx.compose.ui.tooling.preview.Preview
+import androidx.compose.ui.unit.DpSize
 import androidx.compose.ui.unit.dp
 import androidx.compose.ui.unit.sp
 import com.halilibo.richtext.ui.RichTextStyle
@@ -83,7 +89,7 @@ fun RichTextStyleConfig(
   onChanged: (RichTextStyle) -> Unit
 ) {
   Text("Paragraph spacing: ${richTextStyle.paragraphSpacing}")
-  Slider(
+  SliderForHumans(
     value = richTextStyle.paragraphSpacing!!.value,
     valueRange = 0f..20f,
     onValueChange = {
@@ -92,7 +98,7 @@ fun RichTextStyleConfig(
   )
 
   Text("Table cell padding: ${richTextStyle.tableStyle!!.cellPadding}")
-  Slider(
+  SliderForHumans(
     value = richTextStyle.tableStyle!!.cellPadding!!.value,
     valueRange = 0f..20f,
     onValueChange = {
@@ -107,7 +113,7 @@ fun RichTextStyleConfig(
   )
 
   Text("Table border width padding: ${richTextStyle.tableStyle!!.borderStrokeWidth!!}")
-  Slider(
+  SliderForHumans(
     value = richTextStyle.tableStyle!!.borderStrokeWidth!!,
     valueRange = 0f..20f,
     onValueChange = {
@@ -121,3 +127,35 @@ fun RichTextStyleConfig(
     }
   )
 }
+
+@OptIn(ExperimentalMaterial3Api::class)
+@Composable
+fun SliderForHumans(
+  value: Float,
+  onValueChange: (Float) -> Unit,
+  modifier: Modifier = Modifier,
+  enabled: Boolean = true,
+  valueRange: ClosedFloatingPointRange<Float> = 0f..1f,
+  @IntRange(from = 0) steps: Int = 0,
+  onValueChangeFinished: (() -> Unit)? = null,
+  colors: SliderColors = SliderDefaults.colors(),
+  interactionSource: MutableInteractionSource = remember { MutableInteractionSource() }
+) {
+  Slider(
+    value = value,
+    onValueChange = onValueChange,
+    modifier = modifier,
+    enabled = enabled,
+    valueRange = valueRange,
+    steps = steps,
+    onValueChangeFinished = onValueChangeFinished,
+    colors = colors,
+    interactionSource = interactionSource,
+    thumb = {
+      SliderDefaults.Thumb(
+        interactionSource = interactionSource,
+        thumbSize = DpSize(4.dp, 20.dp)
+      )
+    }
+  )
+}

android-sample/src/main/java/com/zachklipp/richtext/sample/SampleLauncher.kt

@@ -6,6 +6,8 @@ import androidx.compose.foundation.clickable
 import androidx.compose.foundation.layout.aspectRatio
 import androidx.compose.foundation.layout.height
 import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.foundation.layout.width
 import androidx.compose.foundation.lazy.LazyColumn
 import androidx.compose.foundation.lazy.itemsIndexed
 import androidx.compose.material3.ExperimentalMaterial3Api
@@ -78,7 +80,7 @@ private val Samples = listOf<Pair<String, @Composable () -> Unit>>(
 @Composable private fun SamplePreview(content: @Composable () -> Unit) {
   ScreenPreview(
     Modifier
-      .height(50.dp)
+      .size(50.dp)
       .aspectRatio(1f)
       .clipToBounds()
       // "Zoom in" to the top-start corner to make the preview more legible.

android-sample/src/main/java/com/zachklipp/richtext/sample/TextDemo.kt

@@ -1,5 +1,7 @@
 package com.zachklipp.richtext.sample
 
+import android.content.Context
+import android.widget.Toast
 import androidx.compose.animation.Animatable
 import androidx.compose.animation.core.Animatable
 import androidx.compose.animation.core.LinearEasing
@@ -14,6 +16,7 @@ import androidx.compose.foundation.layout.size
 import androidx.compose.foundation.layout.wrapContentSize
 import androidx.compose.material3.Text
 import androidx.compose.runtime.Composable
+import androidx.compose.runtime.CompositionLocalProvider
 import androidx.compose.runtime.LaunchedEffect
 import androidx.compose.runtime.getValue
 import androidx.compose.runtime.mutableStateOf
@@ -28,6 +31,8 @@ import androidx.compose.ui.graphics.StrokeCap.Companion.Round
 import androidx.compose.ui.graphics.drawscope.withTransform
 import androidx.compose.ui.graphics.graphicsLayer
 import androidx.compose.ui.platform.LocalContext
+import androidx.compose.ui.platform.LocalUriHandler
+import androidx.compose.ui.platform.UriHandler
 import androidx.compose.ui.text.TextStyle
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
@@ -65,7 +70,7 @@ import kotlinx.coroutines.launch
       appendPreviewSentence(Superscript)
       appendPreviewSentence(Code)
       appendPreviewSentence(
-        Link(""),
+        Link("") { toggleLink = !toggleLink },
         if (toggleLink) "clicked link" else "link"
       )
       append("Here, ")
@@ -96,7 +101,7 @@ import kotlinx.coroutines.launch
       }
     }
   }
-  RichText(linkClickHandler = { toggleLink = !toggleLink }) {
+  RichText {
     Text(text)
   }
 }
@@ -213,3 +218,16 @@ private fun Builder.appendPreviewSentence(
   }
   append(" text. ")
 }
+
+@Composable
+fun ProvideToastUriHandler(context: Context, content: @Composable () -> Unit) {
+  val uriHandler = remember(context) {
+    object : UriHandler {
+      override fun openUri(uri: String) {
+        Toast.makeText(context, uri, Toast.LENGTH_SHORT).show()
+      }
+    }
+  }
+
+  CompositionLocalProvider(LocalUriHandler provides uriHandler, content)
+}

build.gradle.kts

@@ -133,7 +133,7 @@ subprojects {
     extensions.findByType<PublishingExtension>()?.apply {
       repositories {
         maven {
-          val localProperties = gradleLocalProperties(rootProject.rootDir)
+          val localProperties = gradleLocalProperties(rootProject.rootDir, providers)
 
           val sonatypeUsername =
             localProperties.getProperty("SONATYPE_USERNAME") ?: System.getenv("SONATYPE_USERNAME")
@@ -165,7 +165,7 @@ subprojects {
     }
 
     extensions.findByType<SigningExtension>()?.apply {
-      val localProperties = gradleLocalProperties(rootProject.rootDir)
+      val localProperties = gradleLocalProperties(rootProject.rootDir, providers)
 
       val gpgPrivateKey =
         localProperties.getProperty("GPG_PRIVATE_KEY")

buildSrc/build.gradle.kts

@@ -10,8 +10,8 @@ plugins {
 
 dependencies {
   // keep in sync with Dependencies.BuildPlugins.androidGradlePlugin
-  implementation("com.android.tools.build:gradle:8.2.0")
+  implementation("com.android.tools.build:gradle:8.7.0")
   // keep in sync with Dependencies.Kotlin.gradlePlugin
-  implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:1.9.20")
+  implementation("org.jetbrains.kotlin:kotlin-gradle-plugin:2.0.21")
   implementation(kotlin("script-runtime"))
 }