refactor: Roman2Kana関連の特定テーブル前提の処理を削除 (#225)

* refactor: possibleNextsを手動で列挙せず、自動で列挙できるようにした

* refactor: remove table-specific implementation

Sources/KanaKanjiConverterModule/DictionaryManagement/DicdataStore.swift

@@ -1028,58 +1028,14 @@ public final class DicdataStore {
         return true
     }
 
-    static let possibleNexts: [String: [String]] = [
+    static let possibleNexts: [String: [String]] = {
-        "x": ["ァ", "ィ", "ゥ", "ェ", "ォ", "ッ", "ャ", "ュ", "ョ", "ヮ"],
+        var results: [String: [String]] = [:]
-        "l": ["ァ", "ィ", "ゥ", "ェ", "ォ", "ッ", "ャ", "ュ", "ョ", "ヮ"],
+        for (key, value) in Roman2Kana.katakanaChanges {
-        "xt": ["ッ"],
+            for prefixCount in 0 ..< key.count where 0 < prefixCount {
-        "lt": ["ッ"],
+                let prefix = String(key.prefix(prefixCount))
-        "xts": ["ッ"],
+                results[prefix, default: []].append(value)
-        "lts": ["ッ"],
+            }
-        "xy": ["ャ", "ュ", "ョ"],
+        }
-        "ly": ["ャ", "ュ", "ョ"],
+        return results
-        "xw": ["ヮ"],
+    }()
-        "lw": ["ヮ"],
-        "v": ["ヴ"],
-        "k": ["カ", "キ", "ク", "ケ", "コ"],
-        "q": ["クァ", "クィ", "クゥ", "クェ", "クォ"],
-        "qy": ["クャ", "クィ", "クュ", "クェ", "クョ"],
-        "qw": ["クヮ", "クィ", "クゥ", "クェ", "クォ"],
-        "ky": ["キャ", "キィ", "キュ", "キェ", "キョ"],
-        "g": ["ガ", "ギ", "グ", "ゲ", "ゴ"],
-        "gy": ["ギャ", "ギィ", "ギュ", "ギェ", "ギョ"],
-        "s": ["サ", "シ", "ス", "セ", "ソ"],
-        "sy": ["シャ", "シィ", "シュ", "シェ", "ショ"],
-        "sh": ["シャ", "シィ", "シュ", "シェ", "ショ"],
-        "z": ["ザ", "ジ", "ズ", "ゼ", "ゾ"],
-        "zy": ["ジャ", "ジィ", "ジュ", "ジェ", "ジョ"],
-        "j": ["ジ"],
-        "t": ["タ", "チ", "ツ", "テ", "ト"],
-        "ty": ["チャ", "チィ", "チュ", "チェ", "チョ"],
-        "ts": ["ツ"],
-        "th": ["テャ", "ティ", "テュ", "テェ", "テョ"],
-        "tw": ["トァ", "トィ", "トゥ", "トェ", "トォ"],
-        "cy": ["チャ", "チィ", "チュ", "チェ", "チョ"],
-        "ch": ["チ"],
-        "d": ["ダ", "ヂ", "ヅ", "デ", "ド"],
-        "dy": ["ヂャ", "ヂィ", "ヂュ", "ヂェ", "ヂョ"],
-        "dh": ["デャ", "ディ", "デュ", "デェ", "デョ"],
-        "dw": ["ドァ", "ドィ", "ドゥ", "ドェ", "ドォ"],
-        "n": ["ナ", "ニ", "ヌ", "ネ", "ノ", "ン"],
-        "ny": ["ニャ", "ニィ", "ニュ", "ニェ", "ニョ"],
-        "h": ["ハ", "ヒ", "フ", "ヘ", "ホ"],
-        "hy": ["ヒャ", "ヒィ", "ヒュ", "ヒェ", "ヒョ"],
-        "hw": ["ファ", "フィ", "フェ", "フォ"],
-        "f": ["フ"],
-        "b": ["バ", "ビ", "ブ", "ベ", "ボ"],
-        "by": ["ビャ", "ビィ", "ビュ", "ビェ", "ビョ"],
-        "p": ["パ", "ピ", "プ", "ペ", "ポ"],
-        "py": ["ピャ", "ピィ", "ピュ", "ピェ", "ピョ"],
-        "m": ["マ", "ミ", "ム", "メ", "モ"],
-        "my": ["ミャ", "ミィ", "ミュ", "ミェ", "ミョ"],
-        "y": ["ヤ", "ユ", "イェ", "ヨ"],
-        "r": ["ラ", "リ", "ル", "レ", "ロ"],
-        "ry": ["リャ", "リィ", "リュ", "リェ", "リョ"],
-        "w": ["ワ", "ウィ", "ウェ", "ヲ"],
-        "wy": ["ヰ", "ヱ"]
-    ]
 }

Sources/KanaKanjiConverterModule/InputManagement/Roman2Kana.swift

@@ -283,6 +283,45 @@ enum Roman2Kana {
         "whu": "う",
         "whe": "うぇ",
         "who": "うぉ",
+        "bb": "っb",
+        "cc": "っc",
+        "dd": "っd",
+        "ff": "っf",
+        "gg": "っg",
+        "hh": "っh",
+        "jj": "っj",
+        "kk": "っk",
+        "ll": "っl",
+        "mm": "っm",
+        "pp": "っp",
+        "qq": "っq",
+        "rr": "っr",
+        "ss": "っs",
+        "tt": "っt",
+        "vv": "っv",
+        "ww": "っw",
+        "xx": "っx",
+        "yy": "っy",
+        "zz": "っz",
+        "nb": "んb",
+        "nc": "んc",
+        "nd": "んd",
+        "nf": "んf",
+        "ng": "んg",
+        "nh": "んh",
+        "nj": "んj",
+        "nk": "んk",
+        "nl": "んl",
+        "nm": "んm",
+        "np": "んp",
+        "nq": "んq",
+        "nr": "んr",
+        "ns": "んs",
+        "nt": "んt",
+        "nv": "んv",
+        "nw": "んw",
+        "nx": "んx",
+        "nz": "んz",
         "xn": "ん",
         "zh": "←",
         "zj": "↓",
@@ -290,28 +329,20 @@ enum Roman2Kana {
         "zl": "→"
     ].map {(Array($0.key), Array($0.value))})
 
-    static func toHiragana(currentText: [Character], added: Character) -> [Character] {
+    static let maxKeyCount = hiraganaChanges.lazy.map { $0.key.count }.max() ?? 0
-        let last_3 = currentText.suffix(3)
-        if let kana = Roman2Kana.hiraganaChanges[last_3 + [added]] {
-            return currentText.prefix(currentText.count - last_3.count) + kana
-        }
-        let last_2 = currentText.suffix(2)
-        if let kana = Roman2Kana.hiraganaChanges[last_2 + [added]] {
-            return currentText.prefix(currentText.count - last_2.count) + kana
-        }
-        let last_1 = currentText.suffix(1)
-        if let kana = Roman2Kana.hiraganaChanges[last_1 + [added]] {
-            return currentText.prefix(currentText.count - last_1.count) + kana
-        }
-        if last_1 == [added] && String(added).onlyRomanAlphabet {
-            return currentText.prefix(currentText.count - last_1.count) + ["っ", added]
-        }
-        if last_1 == ["n"] && added != "y"{
-            return currentText.prefix(currentText.count - last_1.count) + ["ん", added]
-        }
 
-        if let kana = Roman2Kana.hiraganaChanges[[added]] {
+    static func toHiragana(currentText: [Character], added: Character) -> [Character] {
-            return currentText + kana
+        for n in (0 ..< maxKeyCount).reversed() {
+            if n == 0 {
+                if let kana = Roman2Kana.hiraganaChanges[[added]] {
+                    return currentText + kana
+                }
+            } else {
+                let last = currentText.suffix(n)
+                if let kana = Roman2Kana.hiraganaChanges[last + [added]] {
+                    return currentText.prefix(currentText.count - last.count) + kana
+                }
+            }
         }
         return currentText + [added]
     }

Tests/KanaKanjiConverterModuleTests/Roman2KanaTests.swift

@@ -0,0 +1,26 @@
+@testable import KanaKanjiConverterModule
+import XCTest
+
+final class Roman2KanaTests: XCTestCase {
+    func testToHiragana() throws {
+        // xtsu -> っ
+        XCTAssertEqual(Roman2Kana.toHiragana(currentText: Array(""), added: "x"), Array("x"))
+        XCTAssertEqual(Roman2Kana.toHiragana(currentText: Array("x"), added: "t"), Array("xt"))
+        XCTAssertEqual(Roman2Kana.toHiragana(currentText: Array("xt"), added: "s"), Array("xts"))
+        XCTAssertEqual(Roman2Kana.toHiragana(currentText: Array("xts"), added: "u"), Array("っ"))
+
+        // kanto -> かんと
+        XCTAssertEqual(Roman2Kana.toHiragana(currentText: Array(""), added: "k"), Array("k"))
+        XCTAssertEqual(Roman2Kana.toHiragana(currentText: Array("k"), added: "a"), Array("か"))
+        XCTAssertEqual(Roman2Kana.toHiragana(currentText: Array("か"), added: "n"), Array("かn"))
+        XCTAssertEqual(Roman2Kana.toHiragana(currentText: Array("かn"), added: "t"), Array("かんt"))
+        XCTAssertEqual(Roman2Kana.toHiragana(currentText: Array("かんt"), added: "o"), Array("かんと"))
+
+        // zl -> →
+        XCTAssertEqual(Roman2Kana.toHiragana(currentText: Array(""), added: "z"), Array("z"))
+        XCTAssertEqual(Roman2Kana.toHiragana(currentText: Array("z"), added: "l"), Array("→"))
+
+        // TT -> TT
+        XCTAssertEqual(Roman2Kana.toHiragana(currentText: Array("T"), added: "T"), Array("TT"))
+    }
+}

Tests/KanaKanjiConverterModuleWithDefaultDictionaryTests/DicdataStoreTests/DicdataStoreTests.swift

@@ -329,4 +329,11 @@ final class DicdataStoreTests: XCTestCase {
             XCTAssertEqual(dynamicUserDictResult?.data.metadata, .isFromUserDictionary)
         }
     }
+
+    func testPossibleNexts() throws {
+        let possibleNexts = DicdataStore.possibleNexts
+        XCTAssertEqual(Set(possibleNexts["f", default: []]).symmetricDifference(["ファ", "フィ", "フ", "フェ", "フォ", "フャ", "フュ", "フョ", "フゥ", "ッf"]), [])
+        XCTAssertEqual(Set(possibleNexts["xy", default: []]).symmetricDifference(["ャ", "ョ", "ュ"]), [])
+        XCTAssertEqual(possibleNexts["", default: []], [])
+    }
 }