167 lines
6.9 KiB
Swift
167 lines
6.9 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 PopupCompositionBuffer
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import Shared
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// MARK: - 狀態調度 (State Handling)
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extension SessionCtl {
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/// 針對傳入的新狀態進行調度。
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///
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/// 先將舊狀態單獨記錄起來，再將新舊狀態作為參數，
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/// 根據新狀態本身的狀態種類來判斷交給哪一個專門的函式來處理。
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/// - Remark: ⚠️ 任何在這個函式當中被改變的變數均不得是靜態 (Static) 變數。
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/// 針對某一個客體的 deactivateServer() 可能會在使用者切換到另一個客體應用
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/// 且開始敲字之後才會執行。這個過程會使得不同的 SessionCtl 副本之間出現
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/// 不必要的互相干涉、打斷彼此的工作。
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/// - Parameter newState: 新狀態。
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public func handle(state newState: IMEStateProtocol, replaceCurrent: Bool = true) {
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var previous = state
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if replaceCurrent { state = newState }
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switch newState.type {
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case .ofDeactivated:
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ctlCandidateCurrent.visible = false
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popupCompositionBuffer.hide()
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tooltipInstance.hide()
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if previous.hasComposition {
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commit(text: previous.displayedText)
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}
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clearInlineDisplay()
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// 最後一道保險
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inputHandler.clear()
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// 特殊處理：deactivateServer() 可能會遲於另一個客體會話的 activateServer() 執行。
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// 雖然所有在這個函式內影響到的變數都改為動態變數了（不會出現跨副本波及的情況），
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// 但 IMKCandidates 是有內部共用副本的、會被波及。
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// 所以在這裡糾偏一下、讓所有開啟了選字窗的會話重新顯示選字窗。
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if PrefMgr.shared.useIMKCandidateWindow {
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for instance in Self.allInstances {
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guard let imkC = instance.ctlCandidateCurrent as? CtlCandidateIMK else { continue }
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if instance.state.isCandidateContainer, !imkC.visible {
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instance.handle(state: instance.state, replaceCurrent: false)
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}
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}
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}
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case .ofEmpty, .ofAbortion:
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if newState.type == .ofAbortion {
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previous = IMEState.ofEmpty()
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if replaceCurrent { state = previous }
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}
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ctlCandidateCurrent.visible = false
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tooltipInstance.hide()
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// 全專案用以判斷「.Abortion」的地方僅此一處。
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if previous.hasComposition, newState.type != .ofAbortion {
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commit(text: previous.displayedText)
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}
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// 在這裡手動再取消一次選字窗與工具提示的顯示，可謂雙重保險。
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tooltipInstance.hide()
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clearInlineDisplay()
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// 最後一道保險
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inputHandler.clear()
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case .ofCommitting:
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ctlCandidateCurrent.visible = false
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tooltipInstance.hide()
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commit(text: newState.textToCommit)
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clearInlineDisplay()
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// 最後一道保險
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inputHandler.clear()
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case .ofInputting:
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ctlCandidateCurrent.visible = false
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tooltipInstance.hide()
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commit(text: newState.textToCommit)
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setInlineDisplayWithCursor()
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showTooltip(newState.tooltip)
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case .ofMarking:
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ctlCandidateCurrent.visible = false
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setInlineDisplayWithCursor()
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showTooltip(newState.tooltip)
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case .ofCandidates, .ofAssociates, .ofSymbolTable:
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tooltipInstance.hide()
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setInlineDisplayWithCursor()
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showCandidates()
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default: break
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}
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// 浮動組字窗的顯示判定
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if newState.hasComposition, PrefMgr.shared.clientsIMKTextInputIncapable.contains(clientBundleIdentifier) {
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popupCompositionBuffer.isTypingDirectionVertical = isVerticalTyping
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popupCompositionBuffer.show(
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state: newState, at: lineHeightRect(zeroCursor: true).origin
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)
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} else {
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popupCompositionBuffer.hide()
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}
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}
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/// 針對受 .NotEmpty() 管轄的非空狀態，在組字區內顯示游標。
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public func setInlineDisplayWithCursor() {
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if state.type == .ofAssociates {
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doSetMarkedText(
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state.data.attributedStringPlaceholder, selectionRange: NSRange(location: 0, length: 0),
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replacementRange: NSRange(location: NSNotFound, length: NSNotFound)
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)
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return
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}
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if state.hasComposition || state.isCandidateContainer {
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/// 所謂選區「selectionRange」，就是「可見游標位置」的位置，只不過長度
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/// 是 0 且取代範圍（replacementRange）為「NSNotFound」罷了。
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/// 也就是說，內文組字區該在哪裡出現，得由客體軟體來作主。
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doSetMarkedText(
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attributedStringSecured.0, selectionRange: attributedStringSecured.1,
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replacementRange: NSRange(location: NSNotFound, length: NSNotFound)
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)
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return
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}
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// 其它情形。
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clearInlineDisplay()
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}
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/// 在處理不受 .NotEmpty() 管轄的狀態時可能要用到的函式，會清空螢幕上顯示的內文組字區。
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/// 當 setInlineDisplayWithCursor() 在錯誤的狀態下被呼叫時，也會觸發這個函式。
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private func clearInlineDisplay() {
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doSetMarkedText(
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"", selectionRange: NSRange(location: 0, length: 0),
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replacementRange: NSRange(location: NSNotFound, length: NSNotFound)
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)
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}
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/// 遞交組字區內容。
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/// 注意：必須在 IMK 的 commitComposition 函式當中也間接或者直接執行這個處理。
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private func commit(text: String) {
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guard let client = client(), !text.isEmpty else { return }
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let buffer = ChineseConverter.kanjiConversionIfRequired(text)
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if buffer.isEmpty {
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return
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}
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if let myID = Bundle.main.bundleIdentifier, let clientID = client.bundleIdentifier(), myID == clientID {
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DispatchQueue.main.async {
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client.insertText(
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buffer, replacementRange: NSRange(location: NSNotFound, length: NSNotFound)
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)
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}
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} else {
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client.insertText(
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buffer, replacementRange: NSRange(location: NSNotFound, length: NSNotFound)
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)
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}
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}
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/// 把 setMarkedText 包裝一下，按需啟用 GCD。
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public func doSetMarkedText(_ string: Any!, selectionRange: NSRange, replacementRange: NSRange) {
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guard let client = client() else { return }
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if let myID = Bundle.main.bundleIdentifier, let clientID = client.bundleIdentifier(), myID == clientID {
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DispatchQueue.main.async {
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client.setMarkedText(string, selectionRange: selectionRange, replacementRange: replacementRange)
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}
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} else {
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client.setMarkedText(string, selectionRange: selectionRange, replacementRange: replacementRange)
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}
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}
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}
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