more btex tests

assets/mods/basegame/books/btex.xml

@@ -9,41 +9,61 @@
 
 <manuscript>
 
+
+
     <chapter>What Is a Book</chapter>
 
-    <p>This example book is designed to give you the exampe of the Book Language.</p>
+    <p>This example book is designed to give you the example of the Book Language.</p>
 
     <section>What Really Is a Book</section>
 
-    <p>A book is a collection of texts printed in a special way that allows them to be read easily, with enumerable pages and insertion of other helpful resources, such as illustrations and hyperlinks.</p>
+    <p>A book is a collection of texts printed in a special way that allows them to be read easily, with
+        enumerable pages and insertion of other helpful resources, such as illustrations and hyperlinks.</p>
 
     <newpage />
 
     <fullpagebox>
-        <span colour="grey">
-            <p>this page is intentionally left blank</p>
-        </span>
+        <p><span colour="grey">
+            this page is intentionally left blank
+        </span></p>
     </fullpagebox>
 
+
+
+
     <chapter>Writing Book Using Pen and Papers</chapter>
 
-    <p>If you open a book on a writing table, you will be welcomed with a toolbar used to put other book elements, such as chapters, sections.</p>
+    <p><index id="pen and paper" />If you open a book on a writing table, you will be welcomed with a
+        toolbar used to put other book elements, such as chapters, sections.</p>
+
+
+
 
     <chapter>Writing Book Using Typewriter</chapter>
 
-    <p>Typewriters can only write single style of font, therefore chapters and sections are not available.</p>
+    <p><index id="typewriter" />Typewriters can only write single style of font, therefore chapters and
+        sections are not available.</p>
+
+
+
 
     <chapter>Writing Book using Computer</chapter>
 
-    <p>Writing book using a computer requires a use of the Book Typesetting Engine Extended, or <BTeX /></p>
+    <p>Writing book using a computer requires a use of the Book Typesetting Engine Extended, or <btex /></p>
 
     <section>Full Control of the Shape</section>
 
-    <p>With <BTeX /> you can fully control how your publishing would look like, from a pile of papers that look like they have been typed out using typewriter, a pile of papers but a fully-featured printouts that have illustrations in it, to a fully-featured hardcover book.</p>
+    <p><index id="btex language" />With <btex /> you can fully control how your publishing would look like,
+        from a pile of papers that look like they have been typed out using typewriter, a pile of papers but a
+        fully-featured printouts that have illustrations in it, to a fully-featured hardcover book.</p>
 
-    <p>This style is controlled using the <code>cover</code> attribute on the root tag, with following values: <code>typewriter</code>, <code>printout</code>, <code>hardcover</code></p>
+    <p><index id="cover" />This style is controlled using the <code>cover</code> attribute on the root tag,
+        with following values: <code>typewriter</code>, <code>printout</code>, <code>hardcover</code></p>
 
-    <p>Typewriter and Printout are considered not bound and readers will only see one page at a time, while Hardcover is considered bound and two pages are presented to the readers.</p>
+    <p>Typewriter and Printout are considered not bound and readers will only see one page at a time,
+        while Hardcover is considered bound and two pages are presented to the readers.</p>
 
 </manuscript>
+
+<indexpage><tableofindices /></indexpage>
 </btexdoc>

src/net/torvald/btex/BTeXDocument.kt

@@ -1,10 +1,8 @@
 package net.torvald.terrarum.btex
 
 import com.badlogic.gdx.graphics.Color
-import com.badlogic.gdx.graphics.g2d.BitmapFont
 import com.badlogic.gdx.graphics.g2d.SpriteBatch
 import com.badlogic.gdx.graphics.g2d.TextureRegion
-import net.torvald.terrarum.App
 import net.torvald.terrarum.ui.Toolkit
 import net.torvald.terrarumsansbitmap.MovableType
 
@@ -18,9 +16,9 @@ class BTeXDocument {
     var papersize = "standard"
 
     var pageWidth = 420
-    var lineHeight = 24
+    var lineHeightInPx = 24
     var pageLines = 25
-    var pageHeight = pageLines * lineHeight
+    var pageHeight = pageLines * lineHeightInPx
 
     companion object {
         val DEFAULT_PAGE_BACK = Color(0xe1e1d7ff.toInt())
@@ -29,14 +27,26 @@ class BTeXDocument {
 
     private val pages = ArrayList<BTeXPage>()
 
+    val currentPage: Int
+        get() = pages.size - 1
 
+    var currentLine: Int = 0
+        private set
 
     fun addNewPage(back: Color = DEFAULT_PAGE_BACK) {
         pages.add(BTeXPage(back, pageWidth, pageHeight))
+        currentLine = 0
     }
 
+    /**
+     * Appends draw call to the list. The draw call must be prepared manually so that they would not overflow.
+     * Use `addNewPage` to append the overflowing text to the next page.
+     *
+     * `currentLine` *will* be updated automatically.
+     */
     fun appendDrawCall(drawCall: BTeXDrawCall) {
         pages.last().appendDrawCall(drawCall)
+        currentLine += drawCall.lineCount
     }
 
     fun render(frameDelta: Float, batch: SpriteBatch, page: Int, x: Int, y: Int) {
@@ -64,21 +74,37 @@ class BTeXPage(
     }
 }
 
-data class MovableTypeDrawCall(val movableType: MovableType, val rowStart: Int, val rowEnd: Int) {
-    fun draw(batch: SpriteBatch, x: Float, y: Float) {
+interface BTeXTextDrawCall {
+    val rowStart: Int
+    val rowEnd: Int
+    fun draw(batch: SpriteBatch, x: Float, y: Float)
+}
+
+data class MovableTypeDrawCall(val movableType: MovableType, override val rowStart: Int, override val rowEnd: Int): BTeXTextDrawCall {
+    override fun draw(batch: SpriteBatch, x: Float, y: Float) {
         movableType.draw(batch, x, y, rowStart, rowEnd)
     }
 }
 
+/*data class RaggedLeftDrawCall(val raggedType: RaggedType, override val rowStart: Int, override val rowEnd: Int): BTeXTextDrawCall {
+    override fun draw(batch: SpriteBatch, x: Float, y: Float) {
+        raggedType.draw(batch, x, y, rowStart, rowEnd)
+    }
+}*/
+
 class BTeXDrawCall(
-    val posX: Int,
-    val posY: Int,
+    val posX: Int, // position relative to the page start (excluding page margin)
+    val posY: Int, // position relative to the page start (excluding page margin)
     val theme: String,
     val colour: Color,
-    val text: MovableTypeDrawCall? = null,
+    val text: BTeXTextDrawCall? = null,
     val texture: TextureRegion? = null,
 ) {
 
+    init {
+        if (text != null && texture != null) throw IllegalArgumentException("Text and Texture are both non-null")
+    }
+
     fun draw(batch: SpriteBatch, x: Int, y: Int) {
         val px = (posX + x).toFloat()
         val py = (posY + y).toFloat()
@@ -98,4 +124,9 @@ class BTeXDrawCall(
         else throw Error("Text and Texture are both non-null")
     }
 
+    internal val lineCount = if (text != null)
+        text.rowEnd - text.rowStart
+    else
+        TODO()
+
 }

src/net/torvald/btex/BTeXParser.kt

@@ -4,7 +4,11 @@ import com.badlogic.gdx.files.FileHandle
 import com.badlogic.gdx.graphics.Color
 import net.torvald.terrarum.App
 import net.torvald.terrarum.btex.BTeXDocument
+import net.torvald.terrarum.btex.BTeXDrawCall
+import net.torvald.terrarum.btex.MovableTypeDrawCall
 import net.torvald.terrarum.gameitems.ItemID
+import net.torvald.terrarumsansbitmap.MovableType
+import net.torvald.terrarumsansbitmap.gdx.TerrarumSansBitmap
 import org.xml.sax.Attributes
 import org.xml.sax.InputSource
 import org.xml.sax.helpers.DefaultHandler
@@ -20,6 +24,9 @@ import kotlin.reflect.full.findAnnotation
  */
 object BTeXParser {
 
+    internal val textTags = hashSetOf("P", "TITLE", "AUTHOR", "EDITION", "CHAPTER", "SECTION")
+    internal val textDecorTags = hashSetOf("SPAN", "CODE")
+
     operator fun invoke(file: FileHandle) = invoke(file.file())
 
     operator fun invoke(file: File): BTeXDocument {
@@ -39,7 +46,7 @@ object BTeXParser {
 
     internal class BTeXHandler(val doc: BTeXDocument) : DefaultHandler() {
         private val DEFAULT_FONTCOL = Color(0x222222ff)
-        private val LINE_HEIGHT = doc.lineHeight
+        private val LINE_HEIGHT = doc.lineHeightInPx
 
         private var cover = ""
         private var inner = ""
@@ -56,7 +63,7 @@ object BTeXParser {
 
         private val tagStack = ArrayList<String>() // index zero should be "btex"
 
-
+        private var currentTheme = ""
         private var spanColour: String? = null
 
 
@@ -66,6 +73,8 @@ object BTeXParser {
         private val elemOpeners: HashMap<String, KFunction<*>> = HashMap()
         private val elemClosers: HashMap<String, KFunction<*>> = HashMap()
 
+        private val paragraphBuffer = StringBuilder()
+
         init {
             BTeXHandler::class.declaredFunctions.filter { it.findAnnotation<OpenTag>() != null }.forEach {
                 println("Tag opener: ${it.name}")
@@ -101,14 +110,21 @@ object BTeXParser {
         }
 
         override fun startElement(uri: String, localName: String, qName: String, attributes: Attributes) {
-            val tag = qName; if (tagStack.isEmpty() && tag.lowercase() != "btexdoc") throw BTeXParsingException("Document is not BTeX")
-            tagStack.add(tag)
+            val tag = qName
+            if (tagStack.isEmpty() && tag.lowercase() != "btexdoc") throw BTeXParsingException("Document is not BTeX")
+            val theTag = tag.uppercase()
+
+            if (tagStack.isNotEmpty() && tagStack.any { textTags.contains(it) } && textTags.contains(theTag))
+                throw IllegalStateException("Text tag '$theTag' used inside of text tags (tag stack is ${tagStack.joinToString()})")
+            if (tagStack.isNotEmpty() && !textTags.contains(tagStack.last()) && textDecorTags.contains(theTag))
+                throw IllegalStateException("Text decoration tag '$theTag' used outside of a text tag (tag stack is ${tagStack.joinToString()})")
+
+            tagStack.add(theTag)
 
             val attribs = HashMap<String, String>().also {
                 it.putAll((0 until attributes.length).map { attributes.getQName(it) to attributes.getValue(it) })
             }
 
-            val theTag = tag.uppercase()
 
             elemOpeners["processElem$theTag"].let {
                 if (it == null)
@@ -123,7 +139,7 @@ object BTeXParser {
                 }
             }
 
-//            printdbg("Start element \t($tag)")
+//            printdbg("Start element \t($theTag)")
         }
 
         override fun endElement(uri: String, localName: String, qName: String) {
@@ -147,8 +163,9 @@ object BTeXParser {
             val str =
                 String(ch.sliceArray(start until start + length)).replace('\n', ' ').replace(Regex(" +"), " ")//.trim()
 
-            if (str.isNotBlank()) {
-                printdbg("Characters \t\"$str\"")
+            if (str.isNotEmpty()) {
+//                printdbg("Characters \t\"$str\"")
+                paragraphBuffer.append(str)
             }
         }
 
@@ -170,16 +187,212 @@ object BTeXParser {
             typeY += h
         }
 
+        private lateinit var testFont: TerrarumSansBitmap
 
         private fun getFont() = when (cover) {
             "typewriter" -> TODO()
-            else -> App.fontGame
+            else -> App.fontGame ?: let {
+                if (!::testFont.isInitialized) testFont = TerrarumSansBitmap(App.FONT_DIR)
+                testFont
+            }
         }
 
-        private fun getSpanColour(): Color = spanColourMap.getOrDefault(spanColour, DEFAULT_FONTCOL)
+        private val hexColRegexRGBshort = Regex("#[0-9a-fA-F]{3,3}")
+        private val hexColRegexRGB = Regex("#[0-9a-fA-F]{6,6}")
 
+        private fun getSpanColour(): Color = if (spanColour == null) DEFAULT_FONTCOL
+        else if (spanColour!!.matches(hexColRegexRGB)) {
+            val rs = spanColour!!.substring(1,3)
+            val gs = spanColour!!.substring(3,5)
+            val bs = spanColour!!.substring(5,7)
+
+            val r = rs.toInt(16) / 255f
+            val g = gs.toInt(16) / 255f
+            val b = bs.toInt(16) / 255f
+
+            Color(r, g, b, 1f)
+        }
+        else if (spanColour!!.matches(hexColRegexRGBshort)) {
+            val rs = spanColour!!.substring(1,2)
+            val gs = spanColour!!.substring(2,3)
+            val bs = spanColour!!.substring(3,4)
+
+            val r = rs.toInt(16) / 15f
+            val g = gs.toInt(16) / 15f
+            val b = bs.toInt(16) / 15f
+
+            Color(r, g, b, 1f)
+        }
+        else
+            spanColourMap.getOrDefault(spanColour, DEFAULT_FONTCOL)
+
+        // list of CSS named colours (list supports up to CSS Colors Level 4)
         private val spanColourMap = hashMapOf(
-            "grey" to Color.LIGHT_GRAY
+            "black" to Color(0x000000ff.toInt()),
+            "silver" to Color(0xc0c0c0ff.toInt()),
+            "gray" to Color(0x808080ff.toInt()),
+            "white" to Color(0xffffffff.toInt()),
+            "maroon" to Color(0x800000ff.toInt()),
+            "red" to Color(0xff0000ff.toInt()),
+            "purple" to Color(0x800080ff.toInt()),
+            "fuchsia" to Color(0xff00ffff.toInt()),
+            "green" to Color(0x008000ff.toInt()),
+            "lime" to Color(0x00ff00ff.toInt()),
+            "olive" to Color(0x808000ff.toInt()),
+            "yellow" to Color(0xffff00ff.toInt()),
+            "navy" to Color(0x000080ff.toInt()),
+            "blue" to Color(0x0000ffff.toInt()),
+            "teal" to Color(0x008080ff.toInt()),
+            "aqua" to Color(0x00ffffff.toInt()),
+            "aliceblue" to Color(0xf0f8ffff.toInt()),
+            "antiquewhite" to Color(0xfaebd7ff.toInt()),
+            "aqua" to Color(0x00ffffff.toInt()),
+            "aquamarine" to Color(0x7fffd4ff.toInt()),
+            "azure" to Color(0xf0ffffff.toInt()),
+            "beige" to Color(0xf5f5dcff.toInt()),
+            "bisque" to Color(0xffe4c4ff.toInt()),
+            "black" to Color(0x000000ff.toInt()),
+            "blanchedalmond" to Color(0xffebcdff.toInt()),
+            "blue" to Color(0x0000ffff.toInt()),
+            "blueviolet" to Color(0x8a2be2ff.toInt()),
+            "brown" to Color(0xa52a2aff.toInt()),
+            "burlywood" to Color(0xdeb887ff.toInt()),
+            "cadetblue" to Color(0x5f9ea0ff.toInt()),
+            "chartreuse" to Color(0x7fff00ff.toInt()),
+            "chocolate" to Color(0xd2691eff.toInt()),
+            "coral" to Color(0xff7f50ff.toInt()),
+            "cornflowerblue" to Color(0x6495edff.toInt()),
+            "cornsilk" to Color(0xfff8dcff.toInt()),
+            "crimson" to Color(0xdc143cff.toInt()),
+            "cyan" to Color(0x00ffffff.toInt()),
+            "darkblue" to Color(0x00008bff.toInt()),
+            "darkcyan" to Color(0x008b8bff.toInt()),
+            "darkgoldenrod" to Color(0xb8860bff.toInt()),
+            "darkgray" to Color(0xa9a9a9ff.toInt()),
+            "darkgreen" to Color(0x006400ff.toInt()),
+            "darkgrey" to Color(0xa9a9a9ff.toInt()),
+            "darkkhaki" to Color(0xbdb76bff.toInt()),
+            "darkmagenta" to Color(0x8b008bff.toInt()),
+            "darkolivegreen" to Color(0x556b2fff.toInt()),
+            "darkorange" to Color(0xff8c00ff.toInt()),
+            "darkorchid" to Color(0x9932ccff.toInt()),
+            "darkred" to Color(0x8b0000ff.toInt()),
+            "darksalmon" to Color(0xe9967aff.toInt()),
+            "darkseagreen" to Color(0x8fbc8fff.toInt()),
+            "darkslateblue" to Color(0x483d8bff.toInt()),
+            "darkslategray" to Color(0x2f4f4fff.toInt()),
+            "darkslategrey" to Color(0x2f4f4fff.toInt()),
+            "darkturquoise" to Color(0x00ced1ff.toInt()),
+            "darkviolet" to Color(0x9400d3ff.toInt()),
+            "deeppink" to Color(0xff1493ff.toInt()),
+            "deepskyblue" to Color(0x00bfffff.toInt()),
+            "dimgray" to Color(0x696969ff.toInt()),
+            "dimgrey" to Color(0x696969ff.toInt()),
+            "dodgerblue" to Color(0x1e90ffff.toInt()),
+            "firebrick" to Color(0xb22222ff.toInt()),
+            "floralwhite" to Color(0xfffaf0ff.toInt()),
+            "forestgreen" to Color(0x228b22ff.toInt()),
+            "fuchsia" to Color(0xff00ffff.toInt()),
+            "gainsboro" to Color(0xdcdcdcff.toInt()),
+            "ghostwhite" to Color(0xf8f8ffff.toInt()),
+            "gold" to Color(0xffd700ff.toInt()),
+            "goldenrod" to Color(0xdaa520ff.toInt()),
+            "gray" to Color(0x808080ff.toInt()),
+            "green" to Color(0x008000ff.toInt()),
+            "greenyellow" to Color(0xadff2fff.toInt()),
+            "grey" to Color(0x808080ff.toInt()),
+            "honeydew" to Color(0xf0fff0ff.toInt()),
+            "hotpink" to Color(0xff69b4ff.toInt()),
+            "indianred" to Color(0xcd5c5cff.toInt()),
+            "indigo" to Color(0x4b0082ff.toInt()),
+            "ivory" to Color(0xfffff0ff.toInt()),
+            "khaki" to Color(0xf0e68cff.toInt()),
+            "lavender" to Color(0xe6e6faff.toInt()),
+            "lavenderblush" to Color(0xfff0f5ff.toInt()),
+            "lawngreen" to Color(0x7cfc00ff.toInt()),
+            "lemonchiffon" to Color(0xfffacdff.toInt()),
+            "lightblue" to Color(0xadd8e6ff.toInt()),
+            "lightcoral" to Color(0xf08080ff.toInt()),
+            "lightcyan" to Color(0xe0ffffff.toInt()),
+            "lightgoldenrodyellow" to Color(0xfafad2ff.toInt()),
+            "lightgray" to Color(0xd3d3d3ff.toInt()),
+            "lightgreen" to Color(0x90ee90ff.toInt()),
+            "lightgrey" to Color(0xd3d3d3ff.toInt()),
+            "lightpink" to Color(0xffb6c1ff.toInt()),
+            "lightsalmon" to Color(0xffa07aff.toInt()),
+            "lightseagreen" to Color(0x20b2aaff.toInt()),
+            "lightskyblue" to Color(0x87cefaff.toInt()),
+            "lightslategray" to Color(0x778899ff.toInt()),
+            "lightslategrey" to Color(0x778899ff.toInt()),
+            "lightsteelblue" to Color(0xb0c4deff.toInt()),
+            "lightyellow" to Color(0xffffe0ff.toInt()),
+            "lime" to Color(0x00ff00ff.toInt()),
+            "limegreen" to Color(0x32cd32ff.toInt()),
+            "linen" to Color(0xfaf0e6ff.toInt()),
+            "magenta" to Color(0xff00ffff.toInt()),
+            "maroon" to Color(0x800000ff.toInt()),
+            "mediumaquamarine" to Color(0x66cdaaff.toInt()),
+            "mediumblue" to Color(0x0000cdff.toInt()),
+            "mediumorchid" to Color(0xba55d3ff.toInt()),
+            "mediumpurple" to Color(0x9370dbff.toInt()),
+            "mediumseagreen" to Color(0x3cb371ff.toInt()),
+            "mediumslateblue" to Color(0x7b68eeff.toInt()),
+            "mediumspringgreen" to Color(0x00fa9aff.toInt()),
+            "mediumturquoise" to Color(0x48d1ccff.toInt()),
+            "mediumvioletred" to Color(0xc71585ff.toInt()),
+            "midnightblue" to Color(0x191970ff.toInt()),
+            "mintcream" to Color(0xf5fffaff.toInt()),
+            "mistyrose" to Color(0xffe4e1ff.toInt()),
+            "moccasin" to Color(0xffe4b5ff.toInt()),
+            "navajowhite" to Color(0xffdeadff.toInt()),
+            "navy" to Color(0x000080ff.toInt()),
+            "oldlace" to Color(0xfdf5e6ff.toInt()),
+            "olive" to Color(0x808000ff.toInt()),
+            "olivedrab" to Color(0x6b8e23ff.toInt()),
+            "orange" to Color(0xffa500ff.toInt()),
+            "orangered" to Color(0xff4500ff.toInt()),
+            "orchid" to Color(0xda70d6ff.toInt()),
+            "palegoldenrod" to Color(0xeee8aaff.toInt()),
+            "palegreen" to Color(0x98fb98ff.toInt()),
+            "paleturquoise" to Color(0xafeeeeff.toInt()),
+            "palevioletred" to Color(0xdb7093ff.toInt()),
+            "papayawhip" to Color(0xffefd5ff.toInt()),
+            "peachpuff" to Color(0xffdab9ff.toInt()),
+            "peru" to Color(0xcd853fff.toInt()),
+            "pink" to Color(0xffc0cbff.toInt()),
+            "plum" to Color(0xdda0ddff.toInt()),
+            "powderblue" to Color(0xb0e0e6ff.toInt()),
+            "purple" to Color(0x800080ff.toInt()),
+            "rebeccapurple" to Color(0x663399ff.toInt()),
+            "red" to Color(0xff0000ff.toInt()),
+            "rosybrown" to Color(0xbc8f8fff.toInt()),
+            "royalblue" to Color(0x4169e1ff.toInt()),
+            "saddlebrown" to Color(0x8b4513ff.toInt()),
+            "salmon" to Color(0xfa8072ff.toInt()),
+            "sandybrown" to Color(0xf4a460ff.toInt()),
+            "seagreen" to Color(0x2e8b57ff.toInt()),
+            "seashell" to Color(0xfff5eeff.toInt()),
+            "sienna" to Color(0xa0522dff.toInt()),
+            "silver" to Color(0xc0c0c0ff.toInt()),
+            "skyblue" to Color(0x87ceebff.toInt()),
+            "slateblue" to Color(0x6a5acdff.toInt()),
+            "slategray" to Color(0x708090ff.toInt()),
+            "slategrey" to Color(0x708090ff.toInt()),
+            "snow" to Color(0xfffafaff.toInt()),
+            "springgreen" to Color(0x00ff7fff.toInt()),
+            "steelblue" to Color(0x4682b4ff.toInt()),
+            "tan" to Color(0xd2b48cff.toInt()),
+            "teal" to Color(0x008080ff.toInt()),
+            "thistle" to Color(0xd8bfd8ff.toInt()),
+            "tomato" to Color(0xff6347ff.toInt()),
+            "transparent" to Color(0),
+            "turquoise" to Color(0x40e0d0ff.toInt()),
+            "violet" to Color(0xee82eeff.toInt()),
+            "wheat" to Color(0xf5deb3ff.toInt()),
+            "white" to Color(0xffffffff.toInt()),
+            "whitesmoke" to Color(0xf5f5f5ff.toInt()),
+            "yellow" to Color(0xffff00ff.toInt()),
+            "yellowgreen" to Color(0x9acd32ff.toInt())
         )
 
         private val pageWidthMap = hashMapOf(
@@ -239,14 +452,35 @@ object BTeXParser {
             // TODO add post-parsing hook to the handler
         }
 
-
-
-
-
+        @OpenTag // reflective access is impossible with 'private'
+        fun processElemBTEX(handler: BTeXHandler, doc: BTeXDocument, theTag: String, uri: String, attribs: HashMap<String, String>) {
+            handler.paragraphBuffer.append("BTeX")
+        }
 
         @OpenTag // reflective access is impossible with 'private'
-        fun processElemBR(handler: BTeXHandler, doc: BTeXDocument, theTag: String, uri: String, attribs: HashMap<String, String>) {
+        fun processElemCOVER(handler: BTeXHandler, doc: BTeXDocument, theTag: String, uri: String, attribs: HashMap<String, String>) {
+            doc.addNewPage(Color(0x6f4a45ff))
+        }
 
+        @OpenTag // reflective access is impossible with 'private'
+        fun processElemTOC(handler: BTeXHandler, doc: BTeXDocument, theTag: String, uri: String, attribs: HashMap<String, String>) {
+            doc.addNewPage()
+        }
+
+        @OpenTag // reflective access is impossible with 'private'
+        fun processElemMANUSCRIPT(handler: BTeXHandler, doc: BTeXDocument, theTag: String, uri: String, attribs: HashMap<String, String>) {
+            doc.addNewPage()
+        }
+
+
+
+
+
+
+
+            @OpenTag // reflective access is impossible with 'private'
+        fun processElemBR(handler: BTeXHandler, doc: BTeXDocument, theTag: String, uri: String, attribs: HashMap<String, String>) {
+            handler.paragraphBuffer.append("\n")
         }
 
         @OpenTag // reflective access is impossible with 'private'
@@ -256,12 +490,63 @@ object BTeXParser {
 
         @OpenTag // reflective access is impossible with 'private'
         fun processElemP(handler: BTeXHandler, doc: BTeXDocument, theTag: String, uri: String, attribs: HashMap<String, String>) {
-
         }
 
         @CloseTag // reflective access is impossible with 'private'
         fun closeElemP(handler: BTeXHandler, doc: BTeXDocument, theTag: String, uri: String) {
+            printdbg("Par: ${handler.paragraphBuffer}")
 
+            val font = getFont()
+            val slugs = MovableType(font, handler.paragraphBuffer.toString(), doc.pageWidth)
+
+
+            var remainder = doc.pageLines - doc.currentLine
+            var slugHeight = slugs.height
+            var linesOut = 0
+
+            if (slugHeight > remainder) {
+                val subset = linesOut to linesOut + remainder
+
+                val drawCall = BTeXDrawCall(
+                    0,
+                    remainder * doc.pageLines,
+                    handler.currentTheme,
+                    handler.getSpanColour(),
+                    MovableTypeDrawCall(slugs, subset.first, subset.second)
+                )
+
+                doc.appendDrawCall(drawCall)
+
+                linesOut += remainder
+                slugHeight -= remainder
+
+                doc.addNewPage()
+            }
+
+            while (slugHeight > 0) {
+                remainder = minOf(slugHeight, doc.pageLines)
+
+                val subset = linesOut to linesOut + remainder
+
+                val drawCall = BTeXDrawCall(
+                    0,
+                    0,
+                    handler.currentTheme,
+                    handler.getSpanColour(),
+                    MovableTypeDrawCall(slugs, subset.first, subset.second)
+                )
+
+                doc.appendDrawCall(drawCall)
+
+                linesOut += remainder
+                slugHeight -= remainder
+
+                if (remainder == doc.pageLines) {
+                    doc.addNewPage()
+                }
+            }
+
+            handler.paragraphBuffer.clear()
         }
 
         @OpenTag // reflective access is impossible with 'private'
@@ -275,6 +560,7 @@ object BTeXParser {
         fun closeElemSPAN(handler: BTeXHandler, doc: BTeXDocument, theTag: String, uri: String) {
             spanColour = null
         }
+
     }
 
 

src/net/torvald/terrarum/tests/BTeXTest.kt

@@ -1,18 +1,18 @@
 package net.torvald.terrarum.tests
 
+import com.badlogic.gdx.ApplicationAdapter
+import com.badlogic.gdx.backends.lwjgl3.Lwjgl3Application
+import com.badlogic.gdx.backends.lwjgl3.Lwjgl3ApplicationConfiguration
+import com.badlogic.gdx.graphics.glutils.ShaderProgram
 import net.torvald.btex.BTeXParser
-import org.xml.sax.Attributes
-import org.xml.sax.HandlerBase
-import org.xml.sax.helpers.DefaultHandler
-import java.io.ByteArrayInputStream
-import java.io.InputStream
-import javax.xml.parsers.SAXParserFactory
+import net.torvald.terrarum.btex.BTeXDocument
 
 
 /**
  * Created by minjaesong on 2023-10-28.
  */
-fun main() {
+class BTeXTest : ApplicationAdapter() {
+
     val csiR = "\u001B[31m"
     val csiG = "\u001B[32m"
     val csi0 = "\u001B[m"
@@ -27,54 +27,87 @@ fun main() {
 <toc><tableofcontents /></toc>
 
 <manuscript>
-
+    
+    
+    
     <chapter>What Is a Book</chapter>
 
-    <p>This example book is designed to give you the exampe of the Book Language.</p>
+    <p>This example book is designed to give you the example of the Book Language.</p>
 
     <section>What Really Is a Book</section>
 
     <p>A book is a collection of texts printed in a special way that allows them to be read easily, with
-    enumerable pages and insertion of other helpful resources, such as illustrations and hyperlinks.</p>
+        enumerable pages and insertion of other helpful resources, such as illustrations and hyperlinks.</p>
 
     <newpage />
 
     <fullpagebox>
-        <span colour="grey">
-            <p>this page is intentionally left blank</p>
-        </span>
+        <p><span colour="grey">
+            this page is intentionally left blank
+        </span></p>
     </fullpagebox>
 
+    
+    
+    
     <chapter>Writing Book Using Pen and Papers</chapter>
 
-    <p>If you open a book on a writing table, you will be welcomed with a toolbar used to put other book
-    elements, such as chapters, sections.</p>
+    <p><index id="pen and paper" />If you open a book on a writing table, you will be welcomed with a
+        toolbar used to put other book elements, such as chapters, sections.</p>
 
+    
+    
+    
     <chapter>Writing Book Using Typewriter</chapter>
 
-    <p>Typewriters can only write single style of font, therefore chapters and sections are not available.</p>
+    <p><index id="typewriter" />Typewriters can only write single style of font, therefore chapters and
+        sections are not available.</p>
 
+    
+    
+    
     <chapter>Writing Book using Computer</chapter>
 
     <p>Writing book using a computer requires a use of the Book Typesetting Engine Extended, or <btex /></p>
 
     <section>Full Control of the Shape</section>
 
-    <p>With <btex /> you can fully control how your publishing would look like, from a pile of papers that
-    look like they have been typed out using typewriter, a pile of papers but a fully-featured printouts that
-    have illustrations in it, to a fully-featured hardcover book.</p>
+    <p><index id="btex language" />With <btex /> you can fully control how your publishing would look like,
+        from a pile of papers that look like they have been typed out using typewriter, a pile of papers but a
+        fully-featured printouts that have illustrations in it, to a fully-featured hardcover book.</p>
 
-    <p>This style is controlled using the <code>cover</code> attribute on the root tag, with following
-    values: <code>typewriter</code>, <code>printout</code>, <code>hardcover</code></p>
+    <p><index id="cover" />This style is controlled using the <code>cover</code> attribute on the root tag,
+        with following values: <code>typewriter</code>, <code>printout</code>, <code>hardcover</code></p>
 
     <p>Typewriter and Printout are considered not bound and readers will only see one page at a time,
-    while Hardcover is considered bound and two pages are presented to the readers.</p>
+        while Hardcover is considered bound and two pages are presented to the readers.</p>
 
 </manuscript>
-</btexdoc>
 
+<indexpage><tableofindices /></indexpage>
+</btexdoc>
 
 """
 
-    val doku = BTeXParser(tex)
+    private lateinit var document: BTeXDocument
+
+    override fun create() {
+        document = BTeXParser.invoke(tex)
+    }
+
+
+
+}
+
+fun main() {
+    ShaderProgram.pedantic = false
+
+    val appConfig = Lwjgl3ApplicationConfiguration()
+    appConfig.useVsync(false)
+    appConfig.setResizable(false)
+    appConfig.setWindowedMode(1280, 720)
+    appConfig.setForegroundFPS(60)
+    appConfig.setOpenGLEmulation(Lwjgl3ApplicationConfiguration.GLEmulation.GL30, 3, 2)
+
+    Lwjgl3Application(BTeXTest(), appConfig)
 }