More cleanup, pulled common functionality from text and code segments into trait.

src/main/scala/li/cil/oc/client/renderer/markdown/segment/BasicTextSegment.scala

@@ -0,0 +1,68 @@
+package li.cil.oc.client.renderer.markdown.segment
+
+import li.cil.oc.client.renderer.markdown.Document
+import net.minecraft.client.gui.FontRenderer
+
+trait BasicTextSegment extends Segment {
+  protected final val breaks = Set(' ', '.', ',', ':', ';', '!', '?', '_', '=', '-', '+', '*', '/', '\\')
+  protected final val lists = Set("- ", "* ")
+  protected lazy val rootPrefix = root.asInstanceOf[TextSegment].text.take(2)
+
+  override def nextX(indent: Int, maxWidth: Int, renderer: FontRenderer): Int = {
+    if (isLast) return 0
+    var currentX = indent
+    var chars = text
+    if (ignoreLeadingWhitespace && indent == 0) chars = chars.dropWhile(_.isWhitespace)
+    val wrapIndent = computeWrapIndent(renderer)
+    var numChars = maxChars(chars, maxWidth - indent, maxWidth - wrapIndent, renderer)
+    while (chars.length > numChars) {
+      chars = chars.drop(numChars).dropWhile(_.isWhitespace)
+      numChars = maxChars(chars, maxWidth - wrapIndent, maxWidth - wrapIndent, renderer)
+      currentX = wrapIndent
+    }
+    currentX + stringWidth(chars, renderer)
+  }
+
+  override def nextY(indent: Int, maxWidth: Int, renderer: FontRenderer): Int = {
+    var lines = 0
+    var chars = text
+    if (ignoreLeadingWhitespace && indent == 0) chars = chars.dropWhile(_.isWhitespace)
+    val wrapIndent = computeWrapIndent(renderer)
+    var numChars = maxChars(chars, maxWidth - indent, maxWidth - wrapIndent, renderer)
+    while (chars.length > numChars) {
+      lines += 1
+      chars = chars.drop(numChars).dropWhile(_.isWhitespace)
+      numChars = maxChars(chars, maxWidth - wrapIndent, maxWidth - wrapIndent, renderer)
+    }
+    if (isLast) lines += 1
+    lines * lineHeight(renderer)
+  }
+
+  // ----------------------------------------------------------------------- //
+
+  protected def text: String
+
+  protected def ignoreLeadingWhitespace: Boolean = true
+
+  protected def lineHeight(renderer: FontRenderer): Int = Document.lineHeight(renderer)
+
+  protected def stringWidth(s: String, renderer: FontRenderer): Int
+
+  protected def maxChars(s: String, maxWidth: Int, maxLineWidth: Int, renderer: FontRenderer): Int = {
+    var pos = -1
+    var lastBreak = -1
+    val fullWidth = stringWidth(s, renderer)
+    while (pos < s.length) {
+      pos += 1
+      val width = stringWidth(s.take(pos), renderer)
+      if (width >= maxWidth) {
+        if (lastBreak > 0 || fullWidth <= maxLineWidth || s.exists(breaks.contains)) return lastBreak + 1
+        else return pos - 1
+      }
+      if (pos < s.length && breaks.contains(s.charAt(pos))) lastBreak = pos
+    }
+    pos
+  }
+
+  protected def computeWrapIndent(renderer: FontRenderer) = if (lists.contains(rootPrefix)) renderer.getStringWidth(rootPrefix) else 0
+}

src/main/scala/li/cil/oc/client/renderer/markdown/segment/CodeSegment.scala

@@ -1,43 +1,10 @@
 package li.cil.oc.client.renderer.markdown.segment
 
 import li.cil.oc.client.renderer.TextBufferRenderCache
-import li.cil.oc.client.renderer.markdown.Document
 import net.minecraft.client.gui.FontRenderer
 import org.lwjgl.opengl.GL11
 
-private[markdown] class CodeSegment(val parent: Segment, val text: String) extends Segment {
-  private final val breaks = Set(' ', '.', ',', ':', ';', '!', '?', '_', '=', '-', '+', '*', '/', '\\')
-  private final val lists = Set("- ", "* ")
-  private lazy val rootPrefix = root.asInstanceOf[TextSegment].text.take(2)
-
-  override def nextX(indent: Int, maxWidth: Int, renderer: FontRenderer): Int = {
-    if (isLast) return 0
-    var currentX = indent
-    var chars = text
-    val wrapIndent = computeWrapIndent(renderer)
-    var numChars = maxChars(chars, maxWidth - indent, maxWidth - wrapIndent)
-    while (chars.length > numChars) {
-      chars = chars.drop(numChars).dropWhile(_.isWhitespace)
-      numChars = maxChars(chars, maxWidth - wrapIndent, maxWidth - wrapIndent)
-      currentX = wrapIndent + 1
-    }
-    currentX + stringWidth(chars)
-  }
-
-  override def nextY(indent: Int, maxWidth: Int, renderer: FontRenderer): Int = {
-    var lines = 0
-    var chars = text
-    val wrapIndent = computeWrapIndent(renderer)
-    var numChars = maxChars(chars, maxWidth - indent, maxWidth - wrapIndent)
-    while (chars.length > numChars) {
-      lines += 1
-      chars = chars.drop(numChars).dropWhile(_.isWhitespace)
-      numChars = maxChars(chars, maxWidth - wrapIndent, maxWidth - wrapIndent)
-    }
-    if (isLast) lines += 1
-    lines * Document.lineHeight(renderer)
-  }
-
+private[markdown] class CodeSegment(val parent: Segment, val text: String) extends BasicTextSegment {
   override def render(x: Int, y: Int, indent: Int, maxWidth: Int, renderer: FontRenderer, mouseX: Int, mouseY: Int): Option[InteractiveSegment] = {
     TextBufferRenderCache.renderer.generateChars(text.toCharArray)
 
@@ -45,38 +12,23 @@ private[markdown] class CodeSegment(val parent: Segment, val text: String) exten
     var currentY = y
     var chars = text
     val wrapIndent = computeWrapIndent(renderer)
-    var numChars = maxChars(chars, maxWidth - indent, maxWidth - wrapIndent)
+    var numChars = maxChars(chars, maxWidth - indent, maxWidth - wrapIndent, renderer)
     while (chars.length > 0) {
       val part = chars.take(numChars)
       GL11.glColor4f(0.75f, 0.8f, 1, 1)
       TextBufferRenderCache.renderer.drawString(part, currentX, currentY)
       currentX = x + wrapIndent
-      currentY += Document.lineHeight(renderer)
+      currentY += lineHeight(renderer)
       chars = chars.drop(numChars).dropWhile(_.isWhitespace)
-      numChars = maxChars(chars, maxWidth - wrapIndent, maxWidth - wrapIndent)
+      numChars = maxChars(chars, maxWidth - wrapIndent, maxWidth - wrapIndent, renderer)
     }
 
     None
   }
 
-  private def stringWidth(s: String): Int = s.length * TextBufferRenderCache.renderer.charRenderWidth
+  override protected def ignoreLeadingWhitespace: Boolean = false
 
-  private def maxChars(s: String, maxWidth: Int, maxLineWidth: Int): Int = {
-    var pos = 0
-    var lastBreak = -1
-    while (pos < s.length) {
-      pos += 1
-      val width = stringWidth(s.take(pos))
-      if (width >= maxWidth) {
-        if (lastBreak > 0 || stringWidth(s) <= maxLineWidth || s.exists(breaks.contains)) return lastBreak + 1
-        else return pos - 1
-      }
-      if (pos < s.length && breaks.contains(s.charAt(pos))) lastBreak = pos
-    }
-    pos
-  }
-
-  private def computeWrapIndent(renderer: FontRenderer) = if (lists.contains(rootPrefix)) renderer.getStringWidth(rootPrefix) else 0
+  override protected def stringWidth(s: String, renderer: FontRenderer): Int = s.length * TextBufferRenderCache.renderer.charRenderWidth
 
   override def toString: String = s"{CodeSegment: text = $text}"
 }

src/main/scala/li/cil/oc/client/renderer/markdown/segment/Segment.scala

@@ -40,8 +40,14 @@ trait Segment {
    */
   def nextY(indent: Int, maxWidth: Int, renderer: FontRenderer): Int
 
+  /**
+   * Render the segment at the specified coordinates with the specified
+   * properties.
+   */
   def render(x: Int, y: Int, indent: Int, maxWidth: Int, renderer: FontRenderer, mouseX: Int, mouseY: Int): Option[InteractiveSegment] = None
 
+  // ----------------------------------------------------------------------- //
+
   // Used during construction, checks a segment for inner segments.
   private[markdown] def refine(pattern: Regex, factory: (Segment, Regex.Match) => Segment): Iterable[Segment] = Iterable(this)
 

src/main/scala/li/cil/oc/client/renderer/markdown/segment/TextSegment.scala

@@ -8,10 +8,32 @@ import scala.annotation.tailrec
 import scala.collection.mutable
 import scala.util.matching.Regex
 
-private[markdown] class TextSegment(val parent: Segment, val text: String) extends Segment {
-  private final val breaks = Set(' ', '.', ',', ':', ';', '!', '?', '_', '=', '-', '+', '*', '/', '\\')
-  private final val lists = Set("- ", "* ")
-  private lazy val rootPrefix = root.asInstanceOf[TextSegment].text.take(2)
+private[markdown] class TextSegment(val parent: Segment, val text: String) extends BasicTextSegment {
+  override def render(x: Int, y: Int, indent: Int, maxWidth: Int, renderer: FontRenderer, mouseX: Int, mouseY: Int): Option[InteractiveSegment] = {
+    var currentX = x + indent
+    var currentY = y
+    var chars = text
+    if (indent == 0) chars = chars.dropWhile(_.isWhitespace)
+    val wrapIndent = computeWrapIndent(renderer)
+    var numChars = maxChars(chars, maxWidth - indent, maxWidth - wrapIndent, renderer)
+    var hovered: Option[InteractiveSegment] = None
+    while (chars.length > 0) {
+      val part = chars.take(numChars)
+      hovered = hovered.orElse(resolvedInteractive.fold(None: Option[InteractiveSegment])(_.checkHovered(mouseX, mouseY, currentX, currentY, stringWidth(part, renderer), (Document.lineHeight(renderer) * resolvedScale).toInt)))
+      GL11.glPushMatrix()
+      GL11.glTranslatef(currentX, currentY, 0)
+      GL11.glScalef(resolvedScale, resolvedScale, resolvedScale)
+      GL11.glTranslatef(-currentX, -currentY, 0)
+      renderer.drawString(resolvedFormat + part, currentX, currentY, resolvedColor)
+      GL11.glPopMatrix()
+      currentX = x + wrapIndent
+      currentY += lineHeight(renderer)
+      chars = chars.drop(numChars).dropWhile(_.isWhitespace)
+      numChars = maxChars(chars, maxWidth - wrapIndent, maxWidth - wrapIndent, renderer)
+    }
+
+    hovered
+  }
 
   override def refine(pattern: Regex, factory: (Segment, Regex.Match) => Segment): Iterable[Segment] = {
     val result = mutable.Buffer.empty[Segment]
@@ -39,63 +61,13 @@ private[markdown] class TextSegment(val parent: Segment, val text: String) exten
     result
   }
 
-  override def nextX(indent: Int, maxWidth: Int, renderer: FontRenderer): Int = {
-    if (isLast) return 0
-    var currentX = indent
-    var chars = text
-    if (indent == 0) chars = chars.dropWhile(_.isWhitespace)
-    val wrapIndent = computeWrapIndent(renderer)
-    var numChars = maxChars(chars, maxWidth - indent, maxWidth - wrapIndent, renderer)
-    while (chars.length > numChars) {
-      chars = chars.drop(numChars).dropWhile(_.isWhitespace)
-      numChars = maxChars(chars, maxWidth - wrapIndent, maxWidth - wrapIndent, renderer)
-      currentX = wrapIndent
-    }
-    currentX + (stringWidth(chars, renderer) * resolvedScale).toInt
-  }
+  // ----------------------------------------------------------------------- //
 
-  override def nextY(indent: Int, maxWidth: Int, renderer: FontRenderer): Int = {
-    var lines = 0
-    var chars = text
-    if (indent == 0) chars = chars.dropWhile(_.isWhitespace)
-    val wrapIndent = computeWrapIndent(renderer)
-    var numChars = maxChars(chars, maxWidth - indent, maxWidth - wrapIndent, renderer)
-    while (chars.length > numChars) {
-      lines += 1
-      chars = chars.drop(numChars).dropWhile(_.isWhitespace)
-      numChars = maxChars(chars, maxWidth - wrapIndent, maxWidth - wrapIndent, renderer)
-    }
-    if (isLast) lines += 1
-    (lines * Document.lineHeight(renderer) * resolvedScale).toInt
-  }
+  override protected def lineHeight(renderer: FontRenderer): Int = (super.lineHeight(renderer) * resolvedScale).toInt
 
-  override def render(x: Int, y: Int, indent: Int, maxWidth: Int, renderer: FontRenderer, mouseX: Int, mouseY: Int): Option[InteractiveSegment] = {
-    val fontScale = resolvedScale
-    var currentX = x + indent
-    var currentY = y
-    var chars = text
-    if (indent == 0) chars = chars.dropWhile(_.isWhitespace)
-    val wrapIndent = computeWrapIndent(renderer)
-    var numChars = maxChars(chars, maxWidth - indent, maxWidth - wrapIndent, renderer)
-    val interactive = findInteractive()
-    var hovered: Option[InteractiveSegment] = None
-    while (chars.length > 0) {
-      val part = chars.take(numChars)
-      hovered = hovered.orElse(interactive.fold(None: Option[InteractiveSegment])(_.checkHovered(mouseX, mouseY, currentX, currentY, (stringWidth(part, renderer) * fontScale).toInt, (Document.lineHeight(renderer) * fontScale).toInt)))
-      GL11.glPushMatrix()
-      GL11.glTranslatef(currentX, currentY, 0)
-      GL11.glScalef(fontScale, fontScale, fontScale)
-      GL11.glTranslatef(-currentX, -currentY, 0)
-      renderer.drawString(resolvedFormat + part, currentX, currentY, resolvedColor)
-      GL11.glPopMatrix()
-      currentX = x + wrapIndent
-      currentY += (Document.lineHeight(renderer) * fontScale).toInt
-      chars = chars.drop(numChars).dropWhile(_.isWhitespace)
-      numChars = maxChars(chars, maxWidth - wrapIndent, maxWidth - wrapIndent, renderer)
-    }
+  override protected def stringWidth(s: String, renderer: FontRenderer): Int = (renderer.getStringWidth(resolvedFormat + s) * resolvedScale).toInt
 
-    hovered
-  }
+  // ----------------------------------------------------------------------- //
 
   protected def color = None: Option[Int]
 
@@ -103,48 +75,28 @@ private[markdown] class TextSegment(val parent: Segment, val text: String) exten
 
   protected def format = ""
 
-  protected def stringWidth(s: String, renderer: FontRenderer): Int = renderer.getStringWidth(resolvedFormat + s)
+  private def resolvedColor: Int = color.getOrElse(parent match {
+    case segment: TextSegment => segment.resolvedColor
+    case _ => 0xDDDDDD
+  })
 
-  def resolvedColor: Int = parent match {
-    case segment: TextSegment => color.getOrElse(segment.resolvedColor)
-    case _ => color.getOrElse(0xDDDDDD)
+  private def resolvedScale: Float = parent match {
+    case segment: TextSegment => scale.getOrElse(1f) * segment.resolvedScale
+    case _ => 1f
   }
 
-  def resolvedScale: Float = parent match {
-    case segment: TextSegment => scale.getOrElse(segment.resolvedScale)
-    case _ => scale.getOrElse(1f)
-  }
-
-  def resolvedFormat: String = parent match {
+  private def resolvedFormat: String = parent match {
     case segment: TextSegment => segment.resolvedFormat + format
     case _ => format
   }
 
-  @tailrec private def findInteractive(): Option[InteractiveSegment] = this match {
+  private lazy val resolvedInteractive: Option[InteractiveSegment] = this match {
     case segment: InteractiveSegment => Some(segment)
     case _ => parent match {
-      case segment: TextSegment => segment.findInteractive()
+      case segment: TextSegment => segment.resolvedInteractive
       case _ => None
     }
   }
 
-  private def maxChars(s: String, maxWidth: Int, maxLineWidth: Int, renderer: FontRenderer): Int = {
-    val fontScale = resolvedScale
-    var pos = -1
-    var lastBreak = -1
-    while (pos < s.length) {
-      pos += 1
-      val width = (stringWidth(s.take(pos), renderer) * fontScale).toInt
-      if (width >= maxWidth) {
-        if (lastBreak > 0 || stringWidth(s, renderer) <= maxLineWidth || s.exists(breaks.contains)) return lastBreak + 1
-        else return pos - 1
-      }
-      if (pos < s.length && breaks.contains(s.charAt(pos))) lastBreak = pos
-    }
-    pos
-  }
-
-  private def computeWrapIndent(renderer: FontRenderer) = if (lists.contains(rootPrefix)) renderer.getStringWidth(rootPrefix) else 0
-
   override def toString: String = s"{TextSegment: text = $text}"
 }