make mutablefunge abstract, add notify method

befunge/src/main/kotlin/befide/befunge/b93/state/Funge93.kt

@@ -1,33 +1,28 @@
 package befide.befunge.b93.state
 
-import befide.befunge.core.events.FungeChange
 import befide.befunge.core.state.MutableFunge
-import befide.befunge.core.util.Event
 
 class Funge93
-    : MutableFunge<Vec2, LongData> {
-    override val size = Vec2(80, 25)
+    : MutableFunge<Vec2, Data93>() {
+    companion object {
+        val DEFAULT_DATA = Data93.SPACE
+        const val DEFAULT_CHAR = '\u2022' // bullet
+    }
 
-    override val onChange = Event<FungeChange<Vec2, LongData>>()
+    override val size = Vec2(80, 25)
 
     override fun next(pos: Vec2, delta: Vec2): Vec2 = (pos + delta) mod size
 
-    override fun defaultData(): LongData = LongData.SPACE
-    override fun defaultChar(): Char = '\u2022' // bullet
+    val contents = hashMapOf<Vec2, Data93>()
 
-    val contents = hashMapOf<Vec2, LongData>()
-
-    override fun get(pos: Vec2): LongData = contents[pos] ?: defaultData()
-    override fun set(pos: Vec2, data: LongData) {
-        if (pos.x !in 0 until size.x || pos.y !in 0 until size.y)
-            return
-
-        val from = this[pos]
-        contents[pos] = data
-        onChange(FungeChange(this, pos, from, data))
+    override fun get(pos: Vec2): Data93 = contents[pos] ?: DEFAULT_DATA
+    override fun set(pos: Vec2, data: Data93) {
+        if (pos in Vec2.ZERO until size) notify(pos) {
+            contents[pos] = data
+        }
     }
 
-    override var data: Map<Vec2, LongData>
+    override var data: Map<Vec2, Data93>
         get() {
             return contents.toMap()
         }
@@ -40,13 +35,13 @@ class Funge93
     override var src: String
         get() {
             val lines = mutableListOf<String>()
-            for ((y, row) in contents.entries.groupBy { it.key.y }.toSortedMap()) {
+            for ((y, row) in data.entries.groupBy { it.key.y }.toSortedMap()) {
                 lines += List(y - lines.size) { "" }
 
                 val chars = mutableListOf<Char>()
                 for ((v, ch) in row.sortedBy { it.key.x }) {
                     chars += List(v.x - chars.size) { ' ' }
-                    chars += ch.char ?: defaultChar()
+                    chars += ch.char ?: DEFAULT_CHAR
                 }
                 lines += chars.joinToString("")
             }
@@ -55,7 +50,7 @@ class Funge93
         set(src) {
             data = src.lines().mapIndexed { y, line ->
                 line.mapIndexed { x, ch ->
-                    Pair(Vec2(x, y), LongData(ch))
+                    Pair(Vec2(x, y), Data93(ch))
                 }
             }.flatten().toMap()
         }