add inline code rule

discord · Oct 27, 2020 · af5f644 · af5f644
1 parent 63234ee
commit af5f644
Show file tree

Hide file tree

Showing 4 changed files with 42 additions and 1 deletion.
diff --git a/app/src/main/java/com/discord/simpleast/sample/CustomMarkdownRules.kt b/app/src/main/java/com/discord/simpleast/sample/CustomMarkdownRules.kt
@@ -119,4 +119,11 @@ object CustomMarkdownRules {
       }
     }
   }
+
+  fun <RC, S : BlockQuoteState<S>> createCodeInlineRule(context: Context): Rule<RC, Node<RC>, S> {
+    return CodeRules.createInlineCodeRule(
+        { listOf(TextAppearanceSpan(context, R.style.Code_TextAppearance)) },
+        { listOf(BackgroundColorSpan(Color.DKGRAY)) },
+    )
+  }
 }
diff --git a/app/src/main/java/com/discord/simpleast/sample/MainActivity.kt b/app/src/main/java/com/discord/simpleast/sample/MainActivity.kt
@@ -70,6 +70,7 @@ class MainActivity : AppCompatActivity() {
             listOf(R.style.Demo_Header_1, R.style.Demo_Header_2, R.style.Demo_Header_3),
             listOf(R.style.Demo_Header_1_Add, R.style.Demo_Header_1_Remove, R.style.Demo_Header_1_Fix)))
         .addRule(CustomMarkdownRules.createCodeRule(this))
+        .addRule(CustomMarkdownRules.createCodeInlineRule(this))
         .addRules(SimpleMarkdownRules.createSimpleMarkdownRules())
 
     resultText.text = SimpleRenderer.render(

diff --git a/app/src/main/java/com/discord/simpleast/sample/SampleTexts.kt b/app/src/main/java/com/discord/simpleast/sample/SampleTexts.kt
@@ -6,7 +6,7 @@ object SampleTexts {
   const val TEXT = """
     Some really long **introduction** text that goes on **__forever__** explaining __something__.
   
-    single newline above
+    single `newline` above. `test` sentence
   """
 
   const val HEADERS = """

diff --git a/simpleast-core/src/main/java/com/discord/simpleast/code/CodeRules.kt b/simpleast-core/src/main/java/com/discord/simpleast/code/CodeRules.kt
@@ -1,5 +1,7 @@
 package com.discord.simpleast.code
 
+import android.text.SpannableStringBuilder
+import android.text.Spanned
 import com.discord.simpleast.core.node.Node
 import com.discord.simpleast.core.node.StyleNode
 import com.discord.simpleast.core.node.TextNode
@@ -37,6 +39,9 @@ object CodeRules {
   val PATTERN_CODE_BLOCK: Pattern =
       Pattern.compile("""^```(?:([A-z0-9_+\-.]+))?(\s*)([^\n].*?)\n*```""", Pattern.DOTALL)
 
+  val PATTERN_CODE_INLINE: Pattern =
+      Pattern.compile("""^`(?:\s*)([^\n].*?)\n*`""", Pattern.DOTALL)
+
   private const val CODE_BLOCK_LANGUAGE_GROUP = 1
   private const val CODE_BLOCK_WS_PREFIX = 2
   private const val CODE_BLOCK_BODY_GROUP = 3
@@ -216,4 +221,32 @@ object CodeRules {
       }
     }
   }
+
+  fun <R, S> createInlineCodeRule(
+      textStyleProvider: StyleNode.SpanProvider<R>,
+      bgStyleProvider: StyleNode.SpanProvider<R>,
+
+  ): Rule<R, Node<R>, S> {
+    return object : Rule<R, Node<R>, S>(PATTERN_CODE_INLINE) {
+      override fun parse(matcher: Matcher, parser: Parser<R, in Node<R>, S>, state: S)
+          : ParseSpec<R, Node<R>, S> {
+        val codeBody = matcher.group(1).orEmpty()
+
+        val content = CodeNode.Content.Raw(codeBody)
+
+        val codeNode = CodeNode(content, null, textStyleProvider)
+        // We can't use a StyleNode here as we can't share background spans.
+        val node = object : Node.Parent<R>(codeNode) {
+          override fun render(builder: SpannableStringBuilder, renderContext: R) {
+            val startIndex = builder.length
+            super.render(builder, renderContext)
+            bgStyleProvider.get(renderContext).forEach {
+              builder.setSpan(it, startIndex, builder.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
+            }
+          }
+        }
+        return ParseSpec.createTerminal(node, state)
+      }
+    }
+  }
 }