110 lines
5.1 KiB
Swift
110 lines
5.1 KiB
Swift
// (c) 2021 and onwards The vChewing Project (MIT-NTL License).
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// ====================
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// This code is released under the MIT license (SPDX-License-Identifier: MIT)
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// ... with NTL restriction stating that:
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// No trademark license is granted to use the trade names, trademarks, service
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// marks, or product names of Contributor, except as required to fulfill notice
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// requirements defined in MIT License.
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import Hotenka
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public enum ChineseConverter {
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public static let shared = HotenkaChineseConverter(plistDir: LMMgr.getBundleDataPath("convdict"))
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private static var punctuationConversionTable: [(String, String)] = [
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("【", "︻"), ("】", "︼"), ("〖", "︗"), ("〗", "︘"), ("〔", "︹"), ("〕", "︺"), ("《", "︽"), ("》", "︾"),
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("〈", "︿"), ("〉", "﹀"), ("「", "﹁"), ("」", "﹂"), ("『", "﹃"), ("』", "﹄"), ("｛", "︷"), ("｝", "︸"),
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("（", "︵"), ("）", "︶"), ("［", "﹇"), ("］", "﹈"),
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]
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/// 將操作對象內的橫排標點轉為縱排標點。
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/// 本來是不推薦使用的，但某些極端的排版情形下、使用的中文字型不支援縱排標點自動切換，才需要這個功能。
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/// - Parameters:
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/// - target: 轉換目標。
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/// - convert: 是否真的執行此操作。不填寫的話，該函式不執行。
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public static func hardenVerticalPunctuations(target: inout String, convert: Bool = false) {
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guard convert else { return }
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for neta in Self.punctuationConversionTable {
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target = target.replacingOccurrences(of: neta.0, with: neta.1)
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}
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}
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// 給 JIS 轉換模式新增疊字符號支援。
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private static func processKanjiRepeatSymbol(target: inout String) {
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guard !target.isEmpty else { return }
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var arr = target.charComponents
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for (i, char) in arr.enumerated() {
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if i == 0 { continue }
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if char == target.charComponents[i - 1] {
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arr[i] = "々"
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}
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}
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target = arr.joined()
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}
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/// 漢字數字大寫轉換專用辭典，順序為：康熙、當代繁體中文、日文、簡體中文。
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private static let currencyNumeralDictTable: [String: (String, String, String, String)] = [
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"一": ("壹", "壹", "壹", "壹"), "二": ("貳", "貳", "弐", "贰"), "三": ("叄", "參", "参", "叁"),
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"四": ("肆", "肆", "肆", "肆"), "五": ("伍", "伍", "伍", "伍"), "六": ("陸", "陸", "陸", "陆"),
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"七": ("柒", "柒", "柒", "柒"), "八": ("捌", "捌", "捌", "捌"), "九": ("玖", "玖", "玖", "玖"),
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"十": ("拾", "拾", "拾", "拾"), "百": ("佰", "佰", "佰", "佰"), "千": ("仟", "仟", "仟", "仟"),
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"万": ("萬", "萬", "萬", "万"), "〇": ("零", "零", "零", "零"),
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]
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/// 將指定字串內的小寫漢字數字轉換為大寫，會對轉換對象進行直接修改操作。
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/// - Parameter target: 轉換對象。
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public static func ensureCurrencyNumerals(target: inout String) {
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if !PrefMgr.shared.currencyNumeralsEnabled { return }
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for key in currencyNumeralDictTable.keys {
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guard let result = currencyNumeralDictTable[key] else { continue }
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if IMEApp.currentInputMode == .imeModeCHS {
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target = target.replacingOccurrences(of: key, with: result.3) // Simplified Chinese
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continue
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}
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switch (PrefMgr.shared.chineseConversionEnabled, PrefMgr.shared.shiftJISShinjitaiOutputEnabled) {
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case (false, true), (true, true): target = target.replacingOccurrences(of: key, with: result.2) // JIS
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case (true, false): target = target.replacingOccurrences(of: key, with: result.0) // KangXi
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default: target = target.replacingOccurrences(of: key, with: result.1) // Contemporary
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}
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}
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}
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/// CrossConvert.
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///
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/// - Parameter string: Text in Original Script.
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/// - Returns: Text converted to Different Script.
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public static func crossConvert(_ string: String) -> String {
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switch IMEApp.currentInputMode {
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case .imeModeCHS:
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return shared.convert(string, to: .zhHantTW)
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case .imeModeCHT:
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return shared.convert(string, to: .zhHansCN)
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default:
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return string
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}
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}
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public static func cnvTradToKangXi(_ strObj: String) -> String {
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shared.convert(strObj, to: .zhHantKX)
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}
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public static func cnvTradToJIS(_ strObj: String) -> String {
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// 該轉換是由康熙繁體轉換至日語當用漢字的，所以需要先跑一遍康熙轉換。
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let strObj = cnvTradToKangXi(strObj)
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var result = shared.convert(strObj, to: .zhHansJP)
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processKanjiRepeatSymbol(target: &result)
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return result
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}
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static func kanjiConversionIfRequired(_ text: String) -> String {
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guard IMEApp.currentInputMode == .imeModeCHT else { return text }
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switch (PrefMgr.shared.chineseConversionEnabled, PrefMgr.shared.shiftJISShinjitaiOutputEnabled) {
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case (false, true): return ChineseConverter.cnvTradToJIS(text)
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case (true, false): return ChineseConverter.cnvTradToKangXi(text)
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// 本來這兩個開關不該同時開啟的，但萬一被同時開啟了的話就這樣處理：
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case (true, true): return ChineseConverter.cnvTradToJIS(text)
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case (false, false): return text
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}
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}
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}
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