multiple candidates display for IME

src/net/torvald/terrarum/Terrarum.kt

@@ -684,7 +684,7 @@ fun AppUpdateListOfSavegames() {
     println("listing savegames...")
 
     // create list of worlds
-    (File(App.worldsDir).listFiles().filter { !it.isDirectory && !it.name.contains('.') }.map { file ->
+    (File(worldsDir).listFiles().filter { !it.isDirectory && !it.name.contains('.') }.mapNotNull { file ->
         try {
             DiskSkimmer(file, Common.CHARSET, true)
         }
@@ -693,7 +693,7 @@ fun AppUpdateListOfSavegames() {
             e.printStackTrace()
             null
         }
-    }.filter { it != null }.sortedByDescending { it!!.getLastModifiedOfFirstFile() } as List<DiskSkimmer>).forEach {
+    }.sortedByDescending { it.getLastModifiedOfFirstFile() }).forEach {
         println(it.diskFile.absolutePath)
         it.rebuild() // disk skimmer was created without initialisation, so do it now
 
@@ -707,7 +707,7 @@ fun AppUpdateListOfSavegames() {
 
 
     // create list of players
-    (File(App.playersDir).listFiles().filter { !it.isDirectory && !it.name.contains('.') }.map { file ->
+    (File(playersDir).listFiles().filter { !it.isDirectory && !it.name.contains('.') }.mapNotNull { file ->
         try {
             DiskSkimmer(file, Common.CHARSET, true)
         }
@@ -716,7 +716,7 @@ fun AppUpdateListOfSavegames() {
             e.printStackTrace()
             null
         }
-    }.filter { it != null }.sortedByDescending { it!!.getLastModifiedOfFirstFile() } as List<DiskSkimmer>).forEach {
+    }.sortedByDescending { it.getLastModifiedOfFirstFile() }).forEach {
         println(it.diskFile.absolutePath)
         it.rebuild() // disk skimmer was created without initialisation, so do it now
 

src/net/torvald/terrarum/console/CommandDict.kt

@@ -17,7 +17,7 @@ object CommandDict {
         printdbg(this, ModMgr.loadOrder.reversed())
         printdbg(this, ModMgr.loadOrder.reversed().map { ModMgr.moduleInfo[it]?.packageName })
 
-        (listOf("net.torvald.terrarum") + ModMgr.loadOrder.reversed().map { ModMgr.moduleInfo[it]?.packageName }.filter { it != null }).forEach{ packageRoot ->
+        (listOf("net.torvald.terrarum") + ModMgr.loadOrder.reversed().mapNotNull { ModMgr.moduleInfo[it]?.packageName }).forEach{ packageRoot ->
             printdbg(this, packageRoot)
             val packageConsole = "$packageRoot.console"
             val stream = ClassLoader.getSystemClassLoader().getResourceAsStream(packageConsole.replace('.','/'))

src/net/torvald/terrarum/gamecontroller/IME.kt

@@ -3,6 +3,9 @@ package net.torvald.terrarum.gamecontroller
 import net.torvald.terrarum.App.printdbg
 import java.io.File
 
+typealias IMECanditates = List<String>
+typealias IMEOutput = String
+
 data class TerrarumKeyLayout(
         val name: String,
         val symbols: Array<Array<String?>>?
@@ -11,9 +14,9 @@ data class TerrarumKeyLayout(
 data class TerrarumInputMethod(
         val name: String,
         // (headkey, shiftin, altgrin)
-        val acceptChar: (Int, Boolean, Boolean) -> Pair<String, String>, // Pair<Display Char, Output Char if any>
-        val backspace: () -> String,
-        val endCompose: () -> String,
+        val acceptChar: (Int, Boolean, Boolean) -> Pair<IMECanditates, IMEOutput>,
+        val backspace: () -> IMECanditates,
+        val endCompose: () -> IMEOutput,
         val reset: () -> Unit,
         val composing: () -> Boolean
 )
@@ -103,6 +106,9 @@ object IME {
         return TerrarumKeyLayout(name, out)
     }
 
+    private fun String.toCanditates(): List<String> =
+            this.split(',').mapNotNull { it.ifBlank { null } }
+
     private fun parseImeFile(file: File): TerrarumInputMethod {
         val code = file.readText(Charsets.UTF_8)
         val jsval = context.eval("js", "\"use strict\";(function(){$code})()")
@@ -111,9 +117,9 @@ object IME {
 
         return TerrarumInputMethod(name, { headkey, shifted, alted ->
             val a = jsval.invokeMember("accept", headkey, shifted, alted)
-            a.getArrayElement(0).asString() to a.getArrayElement(1).asString()
+            a.getArrayElement(0).asString().toCanditates() to a.getArrayElement(1).asString()
         }, {
-            jsval.invokeMember("backspace").asString()
+            jsval.invokeMember("backspace").asString().toCanditates()
         }, {
             jsval.invokeMember("end").asString()
         }, {

src/net/torvald/terrarum/ui/UIItemTextLineInput.kt

@@ -115,7 +115,7 @@ class UIItemTextLineInput(
         get() = buttonsShown > 0 && relativeMouseX in btn2PosX - posX until btn2PosX - posX + WIDTH_ONEBUTTON && relativeMouseY in 0 until height
 
     private var imeOn = false
-    private var composingView = CodepointSequence()
+    private var candidates: List<CodepointSequence> = listOf()
 
     private fun getIME(): TerrarumInputMethod? {
         if (!imeOn) return null
@@ -176,7 +176,7 @@ class UIItemTextLineInput(
                 }
                 else if (keycodes.contains(Input.Keys.BACKSPACE)) {
                     if (ime != null && ime.composing()) {
-                        composingView = CodepointSequence(ime.backspace().toCodePoints())
+                        candidates = ime.backspace().map { CodepointSequence(it.toCodePoints()) }
                     }
                     else if (cursorX <= 0) {
                         cursorX = 0
@@ -230,7 +230,7 @@ class UIItemTextLineInput(
 
                     val codepoints = if (ime != null) {
                         val newStatus = ime.acceptChar(headkey, shiftin, altgrin)
-                        composingView = CodepointSequence(newStatus.first.toCodePoints())
+                        candidates = newStatus.first.map { CodepointSequence(it.toCodePoints()) }
 
                         newStatus.second.toCodePoints()
                     }
@@ -291,7 +291,7 @@ class UIItemTextLineInput(
             paste(s.toCodePoints())
         }
         fboUpdateLatch = true
-        composingView = CodepointSequence()
+        candidates = listOf()
 //        resetIME() // not needed; IME will reset itself
     }
 
@@ -308,7 +308,7 @@ class UIItemTextLineInput(
 
     private fun resetIME() {
         getIME()?.reset?.invoke()
-        composingView = CodepointSequence()
+        candidates = listOf()
     }
 
     private fun paste(codepoints: List<Int>) {
@@ -432,17 +432,25 @@ class UIItemTextLineInput(
         }
 
 
-        // compose view background
-        if (composingView.size > 0) {
-            val previewTextWidth = App.fontGame.getWidth(composingView)
-            val previewWindowWidth = previewTextWidth.coerceAtLeast(20)
+        // draw candidates view
+        if (candidates.isNotEmpty()) {
+            val textWidths = candidates.map { App.fontGame.getWidth(CodepointSequence(it)) }
+
+            val candidateWinW = (textWidths.maxOrNull() ?: 0).coerceAtLeast(20)
+            val candidateWinH = App.fontGame.lineHeight.toInt() * candidates.size
+
+            // candidate view background
             batch.color = TEXTINPUT_COL_BACKGROUND
-            Toolkit.fillArea(batch, cursorXOnScreen + 2, posY + 27, previewWindowWidth, 20)
-            // compose view border
+            Toolkit.fillArea(batch, cursorXOnScreen + 2, posY + 27, candidateWinW, candidateWinH)
+            // candidate view border
             batch.color = Toolkit.Theme.COL_ACTIVE
-            Toolkit.drawBoxBorder(batch, cursorXOnScreen + 1, posY + 26, previewWindowWidth + 2, 22)
-            // compose view text
-            App.fontGame.draw(batch, composingView, cursorXOnScreen + 2 + (previewWindowWidth - previewTextWidth) / 2, posY + 27)
+            Toolkit.drawBoxBorder(batch, cursorXOnScreen + 1, posY + 26, candidateWinW + 2, candidateWinH + 2)
+
+            // candidate view text
+            for (i in candidates.indices) {
+                val previewTextWidth = textWidths[i]
+                App.fontGame.draw(batch, candidates[i], cursorXOnScreen + 2 + (candidateWinW - previewTextWidth) / 2, posY + 27 + i * 20)
+            }
         }
 
         super.render(batch, camera)