Narrow the symbols from preedit

Author: tamo

app/src/main/java/jp/deadend/noname/skk/SKKUserDictionary.kt

@@ -52,6 +52,17 @@ class SKKUserDictionary private constructor(
     override fun getCandidates(rawKey: String): List<String>? =
         getEntry(rawKey)?.candidates?.distinct()
 
+    fun getAllCandidates(): List<String> = mLock.withLock {
+        val store = mStore ?: return@withLock listOf()
+        val list = mutableListOf<String>()
+        val browser = store.cursor() ?: return@withLock listOf()
+        while (true) {
+            val tuple = browser.next() ?: break
+            parseValue(tuple.key, tuple.value)?.candidates?.let { list.addAll(it) }
+        }
+        return@withLock list.distinct()
+    }
+
     fun addEntry(key: String, value: String, okurigana: String) = mLock.withLock {
         val store = mStore ?: return@withLock
         val hiraganaKey = katakana2hiragana(key)

app/src/main/java/jp/deadend/noname/skk/engine/SKKCandidates.kt

@@ -526,4 +526,13 @@ class SKKCandidates(private val engine: SKKEngine, private val service: SKKServi
         isSpecial = false
         mFoundKeys.clear()
     }
+
+    internal fun loadAllSymbols() {
+        val list = engine.mSymbolDict.getAllCandidates()
+        mList = list
+        mCompletionList = list.map { "" }
+        mQuery = ""
+        mIndex = 0
+        setView(list, mQuery, mIndex)
+    }
 }

app/src/main/java/jp/deadend/noname/skk/engine/SKKPreeditState.kt

@@ -89,8 +89,14 @@ object SKKPreeditState : SKKState {
 
             when (codeLower) {
                 ' '.code, '>'.code, ':'.code -> {
-                    if (mCandidates.isSpecial) // カテゴリ選択なので絞り込みなどない
-                        return pickCandidatesViewManually(mCandidates.mIndex)
+                    if (mCandidates.isSpecial) {
+                        return if (codeLower == ':'.code) {
+                            mCandidates.loadAllSymbols() // カテゴリ未選択なので全候補から絞る
+                            changeState(SKKNarrowingState)
+                        } else {
+                            pickCandidatesViewManually(mCandidates.mIndex)
+                        }
+                    }
 
                     // 変換開始
                     // 最後に単体の'n'で終わっている場合、'ん'に変換