refactor(android): enhance LinkRenderer to utilize configurable link styles

Author: hryhoriiK97

android/src/main/java/com/richtext/renderer/NodeRenderer.kt

@@ -1,7 +1,6 @@
 package com.richtext.renderer
 
 import android.text.SpannableStringBuilder
-import android.text.style.UnderlineSpan
 import com.richtext.spans.RichTextLinkSpan
 import com.richtext.spans.RichTextHeadingSpan
 import com.richtext.spans.RichTextParagraphSpan
@@ -128,7 +127,9 @@ class TextRenderer : NodeRenderer {
     }
 }
 
-class LinkRenderer : NodeRenderer {
+class LinkRenderer(
+    private val config: RendererConfig? = null
+) : NodeRenderer {
     override fun render(
         node: Node,
         builder: SpannableStringBuilder,
@@ -140,21 +141,14 @@ class LinkRenderer : NodeRenderer {
 
         var child = link.firstChild
         while (child != null) {
-            NodeRendererFactory.getRenderer(child).render(child, builder, onLinkPress)
+            NodeRendererFactory.getRenderer(child, config).render(child, builder, onLinkPress)
             child = child.next
         }
 
         val contentLength = builder.length - start
-        if (contentLength > 0) {
-            builder.setSpan(
-                RichTextLinkSpan(url, onLinkPress),
-                start,
-                start + contentLength,
-                android.text.SpannableString.SPAN_EXCLUSIVE_EXCLUSIVE
-            )
-
+        if (contentLength > 0 && config != null) {
             builder.setSpan(
-                UnderlineSpan(),
+                RichTextLinkSpan(url, onLinkPress, config.style),
                 start,
                 start + contentLength,
                 android.text.SpannableString.SPAN_EXCLUSIVE_EXCLUSIVE
@@ -180,7 +174,7 @@ object NodeRendererFactory {
             is Paragraph -> ParagraphRenderer(config)
             is Heading -> HeadingRenderer(config)
             is Text -> TextRenderer()
-            is Link -> LinkRenderer()
+            is Link -> LinkRenderer(config)
             is HardLineBreak, is SoftLineBreak -> LineBreakRenderer()
             else -> {
                 android.util.Log.w(

android/src/main/java/com/richtext/spans/RichTextLinkSpan.kt

@@ -4,10 +4,12 @@ import android.text.TextPaint
 import android.text.style.ClickableSpan
 import android.view.View
 import com.richtext.RichTextView
+import com.richtext.styles.RichTextStyle
 
 class RichTextLinkSpan(
   private val url: String,
-  private val onLinkPress: ((String) -> Unit)?
+  private val onLinkPress: ((String) -> Unit)?,
+  private val style: RichTextStyle
 ) : ClickableSpan() {
 
   override fun onClick(widget: View) {
@@ -21,7 +23,7 @@ class RichTextLinkSpan(
 
   override fun updateDrawState(textPaint: TextPaint) {
     super.updateDrawState(textPaint)
-    textPaint.isUnderlineText = true
-    textPaint.color = textPaint.linkColor
+    textPaint.color = style.getLinkColor()
+    textPaint.isUnderlineText = style.getLinkUnderline()
   }
 }

android/src/main/java/com/richtext/styles/RichTextStyle.kt

@@ -8,8 +8,14 @@ data class HeadingStyle(
   val fontFamily: String?
 )
 
+data class LinkStyle(
+  val color: Int,
+  val underline: Boolean
+)
+
 class RichTextStyle(style: ReadableMap) {
   private val headingStyles = arrayOfNulls<HeadingStyle>(7)
+  private lateinit var linkStyle: LinkStyle
 
   init {
     parseStyles(style)
@@ -24,21 +30,35 @@ class RichTextStyle(style: ReadableMap) {
     return headingStyles[level]?.fontFamily
   }
 
+  fun getLinkColor(): Int {
+    return linkStyle.color
+  }
+
+  fun getLinkUnderline(): Boolean {
+    return linkStyle.underline
+  }
+
   private fun parseStyles(style: ReadableMap) {
     (1..6).forEach { level ->
       val levelKey = "h$level"
-      val levelStyle = style.getMap(levelKey)
-      requireNotNull(levelStyle) { "Style for $levelKey not found. JS should always provide defaults." }
-      
-      require(levelStyle.hasKey("fontSize") && !levelStyle.isNull("fontSize")) {
-        "fontSize not found for $levelKey. JS should always provide defaults."
+      val levelStyle = requireNotNull(style.getMap(levelKey)) {
+        "Style for $levelKey not found. JS should always provide defaults."
       }
 
       val fontSize = PixelUtil.toPixelFromSP(levelStyle.getDouble("fontSize").toFloat())
       val fontFamily = levelStyle.getString("fontFamily")
 
       headingStyles[level] = HeadingStyle(fontSize, fontFamily)
     }
+
+    val linkStyleMap = requireNotNull(style.getMap("link")) {
+      "Link style not found. JS should always provide defaults."
+    }
+    
+    val color = linkStyleMap.getInt("color")
+    val underline = linkStyleMap.getBoolean("underline")
+    
+    linkStyle = LinkStyle(color, underline)
   }
 }