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douboer
558
apps/miniprogram/pages/terminal/vtInputHandler.js
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558
apps/miniprogram/pages/terminal/vtInputHandler.js
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/* global module, require */
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/**
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* 轻量 VT 输入处理层：
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* 1. 承接“模式位切换 / 查询响应 / 软重置”这类协议状态逻辑；
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* 2. 不直接持有 buffer 数据结构，只通过上下文回调读写运行态；
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* 3. 先把最容易继续膨胀的协议分支从 `terminalBufferState` 中拆出，为后续继续下沉 CSI/ESC 处理铺路。
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*/
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const { DEFAULT_TERMINAL_MODES } = require("./terminalBufferSet.js");
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function createTerminalVtInputHandler(options) {
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const source = options && typeof options === "object" ? options : {};
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const responses = Array.isArray(source.responses) ? source.responses : [];
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const runtimeColors = source.runtimeColors && typeof source.runtimeColors === "object" ? source.runtimeColors : {};
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const runtimeState = source.runtimeState && typeof source.runtimeState === "object" ? source.runtimeState : {};
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const bufferCols = Math.max(1, Math.round(Number(source.bufferCols) || 0));
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const bufferRows = Math.max(1, Math.round(Number(source.bufferRows) || 0));
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const cloneAnsiState =
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typeof source.cloneAnsiState === "function"
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? source.cloneAnsiState
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: (state) => ({ ...(state && typeof state === "object" ? state : {}) });
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const toOscRgbString =
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typeof source.toOscRgbString === "function" ? source.toOscRgbString : () => "";
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const getActiveBuffer =
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typeof source.getActiveBuffer === "function" ? source.getActiveBuffer : () => null;
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const setCursorRow = typeof source.setCursorRow === "function" ? source.setCursorRow : () => {};
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const getCursorCol = typeof source.getCursorCol === "function" ? source.getCursorCol : () => 0;
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const setCursorCol = typeof source.setCursorCol === "function" ? source.setCursorCol : () => {};
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const getScrollTop = typeof source.getScrollTop === "function" ? source.getScrollTop : () => 0;
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const setScrollTop = typeof source.setScrollTop === "function" ? source.setScrollTop : () => {};
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const getScrollBottom =
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typeof source.getScrollBottom === "function" ? source.getScrollBottom : () => Math.max(0, bufferRows - 1);
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const setScrollBottom =
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typeof source.setScrollBottom === "function" ? source.setScrollBottom : () => {};
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const setAnsiState = typeof source.setAnsiState === "function" ? source.setAnsiState : () => {};
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const moveCursorUp = typeof source.moveCursorUp === "function" ? source.moveCursorUp : () => {};
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const moveCursorDown = typeof source.moveCursorDown === "function" ? source.moveCursorDown : () => {};
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const moveCursorRight =
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typeof source.moveCursorRight === "function" ? source.moveCursorRight : () => {};
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const moveCursorLeft = typeof source.moveCursorLeft === "function" ? source.moveCursorLeft : () => {};
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const moveCursorNextLine =
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typeof source.moveCursorNextLine === "function" ? source.moveCursorNextLine : () => {};
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const moveCursorPreviousLine =
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typeof source.moveCursorPreviousLine === "function" ? source.moveCursorPreviousLine : () => {};
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const setCursorColumn1 =
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typeof source.setCursorColumn1 === "function" ? source.setCursorColumn1 : () => {};
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const setCursorRow1 = typeof source.setCursorRow1 === "function" ? source.setCursorRow1 : () => {};
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const setCursorPosition1 =
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typeof source.setCursorPosition1 === "function" ? source.setCursorPosition1 : () => {};
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const clearDisplayByMode =
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typeof source.clearDisplayByMode === "function" ? source.clearDisplayByMode : () => {};
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const clearLineByMode =
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typeof source.clearLineByMode === "function" ? source.clearLineByMode : () => {};
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const eraseChars = typeof source.eraseChars === "function" ? source.eraseChars : () => {};
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const insertChars = typeof source.insertChars === "function" ? source.insertChars : () => {};
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const deleteChars = typeof source.deleteChars === "function" ? source.deleteChars : () => {};
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const insertLines = typeof source.insertLines === "function" ? source.insertLines : () => {};
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const deleteLines = typeof source.deleteLines === "function" ? source.deleteLines : () => {};
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const scrollRegionUp =
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typeof source.scrollRegionUp === "function" ? source.scrollRegionUp : () => {};
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const scrollRegionDown =
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typeof source.scrollRegionDown === "function" ? source.scrollRegionDown : () => {};
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const setScrollRegion =
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typeof source.setScrollRegion === "function" ? source.setScrollRegion : () => {};
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const resetCursorForOriginMode =
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typeof source.resetCursorForOriginMode === "function" ? source.resetCursorForOriginMode : null;
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const indexDown = typeof source.indexDown === "function" ? source.indexDown : () => {};
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const nextLine = typeof source.nextLine === "function" ? source.nextLine : () => {};
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const reverseIndex =
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typeof source.reverseIndex === "function" ? source.reverseIndex : () => {};
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const getScreenCursorRow =
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typeof source.getScreenCursorRow === "function" ? source.getScreenCursorRow : () => 0;
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const saveCurrentCursor =
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typeof source.saveCurrentCursor === "function" ? source.saveCurrentCursor : () => {};
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const restoreCurrentCursor =
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typeof source.restoreCurrentCursor === "function" ? source.restoreCurrentCursor : () => {};
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const switchActiveBuffer =
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typeof source.switchActiveBuffer === "function" ? source.switchActiveBuffer : () => {};
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const ansiResetState =
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source.ansiResetState && typeof source.ansiResetState === "object" ? source.ansiResetState : {};
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function pushDeviceStatusResponse(privateMarker, code) {
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if (code === 5) {
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responses.push(`${privateMarker === "?" ? "\u001b[?" : "\u001b["}0n`);
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return;
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}
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if (code === 6) {
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const row = getScreenCursorRow() + 1;
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const col = Math.min(bufferCols, getCursorCol()) + 1;
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responses.push(privateMarker === "?" ? `\u001b[?${row};${col}R` : `\u001b[${row};${col}R`);
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}
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}
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/**
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* 设备属性查询只回报当前实现真实支持的“最小可用口径”，
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* 避免把不存在的终端特性伪装成已支持。
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*/
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function pushDeviceAttributesResponse(privateMarker, code) {
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if (code > 0) {
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return;
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}
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if (privateMarker === ">") {
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responses.push("\u001b[>0;276;0c");
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return;
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}
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responses.push("\u001b[?1;2c");
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}
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function pushOscColorReport(ident) {
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let color = "";
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if (ident === "10") {
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color = runtimeColors.defaultForeground;
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} else if (ident === "11") {
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color = runtimeColors.defaultBackground;
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} else if (ident === "12") {
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color = runtimeColors.defaultCursor;
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}
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const rgb = toOscRgbString(color);
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if (!rgb) {
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return;
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}
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responses.push(`\u001b]${ident};${rgb}\u001b\\`);
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}
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/**
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* OSC 10/11/12 允许把多个查询串在一条指令里，这里只对当前已实现的颜色槽位做查询响应。
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*/
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function handleOscSequence(ident, data) {
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const base = Number(ident);
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if (![10, 11, 12].includes(base)) {
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return;
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}
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const slots = String(data || "").split(";");
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for (let offset = 0; offset < slots.length; offset += 1) {
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const slotIdent = String(base + offset);
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if (!["10", "11", "12"].includes(slotIdent)) {
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break;
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}
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if (slots[offset] === "?") {
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pushOscColorReport(slotIdent);
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}
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}
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}
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function pushModeStatusResponse(privateMarker, mode, status) {
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const prefix = privateMarker === "?" ? "?" : "";
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responses.push(`\u001b[${prefix}${mode};${status}$y`);
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}
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/**
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* 这里只回报当前运行态里真实维护的模式位。
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* 未实现模式统一返回 0，避免协议层把“未知能力”冒充成“已支持”。
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*/
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function resolveModeStatus(privateMarker, value) {
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const mode = Math.round(Number(value) || 0);
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if (!mode) return 0;
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if (privateMarker !== "?") {
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if (mode === 4) {
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return runtimeState.modes.insertMode ? 1 : 2;
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}
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return 0;
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}
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if (mode === 1) return runtimeState.modes.applicationCursorKeys ? 1 : 2;
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if (mode === 6) return runtimeState.modes.originMode ? 1 : 2;
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if (mode === 7) return runtimeState.modes.wraparound ? 1 : 2;
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if (mode === 25) return runtimeState.modes.cursorHidden ? 2 : 1;
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if (mode === 45) return runtimeState.modes.reverseWraparound ? 1 : 2;
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if (mode === 66) return runtimeState.modes.applicationKeypad ? 1 : 2;
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if (mode === 47 || mode === 1047 || mode === 1049) {
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const activeBuffer = getActiveBuffer();
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return activeBuffer && activeBuffer.isAlt ? 1 : 2;
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}
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if (mode === 1048) return 1;
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if (mode === 1004) return runtimeState.modes.sendFocus ? 1 : 2;
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if (mode === 2004) return runtimeState.modes.bracketedPasteMode ? 1 : 2;
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return 0;
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}
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function pushModeReport(privateMarker, value) {
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const mode = Math.round(Number(value) || 0);
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if (!mode) return;
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pushModeStatusResponse(privateMarker, mode, resolveModeStatus(privateMarker, mode));
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}
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function pushStatusStringResponse(payload) {
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const value = String(payload || "");
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if (value === "m") {
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responses.push("\u001bP1$r0m\u001b\\");
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return;
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}
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if (value === "r") {
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responses.push(`\u001bP1$r${getScrollTop() + 1};${getScrollBottom() + 1}r\u001b\\`);
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return;
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}
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if (value === " q") {
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responses.push("\u001bP1$r2 q\u001b\\");
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return;
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}
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if (value === '"q') {
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responses.push('\u001bP1$r0"q\u001b\\');
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return;
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}
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if (value === '"p') {
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responses.push('\u001bP1$r61;1"p\u001b\\');
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return;
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}
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responses.push("\u001bP0$r\u001b\\");
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}
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/**
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* DECSTR 只做软重置，不清屏、不搬动当前 cursor。
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* 这部分逻辑必须保持和现有主链路一致，避免复杂 TUI 在软重置后发生可见跳变。
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*/
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function softResetTerminal() {
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runtimeState.modes = { ...DEFAULT_TERMINAL_MODES };
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setAnsiState(cloneAnsiState(ansiResetState));
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setScrollTop(0);
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setScrollBottom(Math.max(0, bufferRows - 1));
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const activeBuffer = getActiveBuffer();
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if (activeBuffer) {
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activeBuffer.savedCursorRow = 0;
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activeBuffer.savedCursorCol = 0;
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activeBuffer.savedAnsiState = cloneAnsiState(ansiResetState);
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}
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}
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function handlePrivateMode(enabled, value) {
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const mode = Math.round(Number(value) || 0);
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if (!mode) return;
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if (mode === 1) {
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runtimeState.modes.applicationCursorKeys = enabled;
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return;
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}
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if (mode === 6) {
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runtimeState.modes.originMode = enabled;
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if (resetCursorForOriginMode) {
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resetCursorForOriginMode(enabled);
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return;
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}
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const activeBuffer = getActiveBuffer();
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setCursorRow(enabled && activeBuffer && activeBuffer.isAlt ? getScrollTop() : 0);
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setCursorCol(0);
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return;
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}
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if (mode === 45) {
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runtimeState.modes.reverseWraparound = enabled;
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return;
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}
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if (mode === 66) {
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runtimeState.modes.applicationKeypad = enabled;
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return;
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}
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if (mode === 7) {
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runtimeState.modes.wraparound = enabled;
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return;
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}
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if (mode === 25) {
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runtimeState.modes.cursorHidden = !enabled;
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return;
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}
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if (mode === 47 || mode === 1047) {
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switchActiveBuffer(enabled ? "alt" : "normal", enabled);
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return;
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}
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if (mode === 1048) {
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if (enabled) {
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saveCurrentCursor();
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} else {
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restoreCurrentCursor();
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}
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return;
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}
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if (mode === 1049) {
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if (enabled) {
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saveCurrentCursor();
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switchActiveBuffer("alt", true);
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} else {
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switchActiveBuffer("normal", false);
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restoreCurrentCursor();
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}
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return;
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}
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if (mode === 2004) {
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runtimeState.modes.bracketedPasteMode = enabled;
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return;
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}
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if (mode === 1004) {
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runtimeState.modes.sendFocus = enabled;
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}
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}
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function handleAnsiMode(enabled, value) {
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const mode = Math.round(Number(value) || 0);
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if (!mode) return;
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if (mode === 4) {
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runtimeState.modes.insertMode = enabled;
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}
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}
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function resolveCsiNumber(values, index, fallback) {
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const value = values && Number(values[index]);
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if (!Number.isFinite(value)) return fallback;
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const normalized = Math.round(value);
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if (normalized < 0) return 0;
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return normalized;
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}
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/**
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* 这里只下沉“CSI -> 光标动作”的协议解释：
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* 1. handler 负责默认参数、1-based 行列语义和 final byte 分派；
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* 2. bufferState 仍负责真实行列边界、history/alt buffer 与 origin mode 的具体落点。
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*/
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function handleCursorControl(final, values) {
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const code = String(final || "");
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if (code === "A") {
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moveCursorUp(Math.max(1, resolveCsiNumber(values, 0, 1)));
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return true;
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}
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if (code === "B") {
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moveCursorDown(Math.max(1, resolveCsiNumber(values, 0, 1)));
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return true;
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}
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if (code === "C") {
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moveCursorRight(Math.max(1, resolveCsiNumber(values, 0, 1)));
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return true;
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}
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if (code === "D") {
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moveCursorLeft(Math.max(1, resolveCsiNumber(values, 0, 1)));
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return true;
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}
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if (code === "E") {
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moveCursorNextLine(Math.max(1, resolveCsiNumber(values, 0, 1)));
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return true;
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}
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if (code === "F") {
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moveCursorPreviousLine(Math.max(1, resolveCsiNumber(values, 0, 1)));
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return true;
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}
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if (code === "G") {
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setCursorColumn1(Math.max(1, resolveCsiNumber(values, 0, 1)));
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return true;
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}
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if (code === "d") {
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setCursorRow1(Math.max(1, resolveCsiNumber(values, 0, 1)));
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return true;
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}
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if (code === "H" || code === "f") {
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setCursorPosition1(
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Math.max(1, resolveCsiNumber(values, 0, 1)),
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Math.max(1, resolveCsiNumber(values, 1, 1))
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);
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return true;
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}
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return false;
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}
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/**
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* 擦除类 CSI 只在这里解释参数语义：
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* 1. `J / K` 走“显示/行清除模式”；
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* 2. `X` 走“从当前光标起擦除 N 列”，默认值保持 1。
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*/
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function handleEraseControl(final, values) {
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const code = String(final || "");
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if (code === "J") {
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clearDisplayByMode(resolveCsiNumber(values, 0, 0));
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return true;
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||||
}
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if (code === "K") {
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clearLineByMode(resolveCsiNumber(values, 0, 0));
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return true;
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}
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||||
if (code === "X") {
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eraseChars(Math.max(1, resolveCsiNumber(values, 0, 1)));
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return true;
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}
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return false;
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}
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||||
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||||
/**
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* 编辑/滚动类 CSI 仍然只解释“协议参数 -> buffer 动作”的映射，
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* 真正的 cell 变更、滚动区约束和 viewport/history 处理继续留在 bufferState。
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*/
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function handleEditControl(final, values) {
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||||
const code = String(final || "");
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||||
if (code === "@") {
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insertChars(Math.max(1, resolveCsiNumber(values, 0, 1)));
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return true;
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||||
}
|
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if (code === "P") {
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deleteChars(Math.max(1, resolveCsiNumber(values, 0, 1)));
|
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return true;
|
||||
}
|
||||
if (code === "L") {
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insertLines(Math.max(1, resolveCsiNumber(values, 0, 1)));
|
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return true;
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}
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||||
if (code === "M") {
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deleteLines(Math.max(1, resolveCsiNumber(values, 0, 1)));
|
||||
return true;
|
||||
}
|
||||
if (code === "S") {
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||||
scrollRegionUp(Math.max(1, resolveCsiNumber(values, 0, 1)));
|
||||
return true;
|
||||
}
|
||||
if (code === "T") {
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||||
scrollRegionDown(Math.max(1, resolveCsiNumber(values, 0, 1)));
|
||||
return true;
|
||||
}
|
||||
if (code === "r") {
|
||||
const top = Math.max(1, resolveCsiNumber(values, 0, 1));
|
||||
const rawBottom = values && values.length > 1 ? resolveCsiNumber(values, 1, bufferRows) : bufferRows;
|
||||
const bottom = rawBottom > 0 ? rawBottom : bufferRows;
|
||||
setScrollRegion(top, bottom);
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* 保存/恢复光标这类协议动作目前同时存在于 CSI 与 ESC 两条入口：
|
||||
* 1. `CSI s / u`
|
||||
* 2. `ESC 7 / 8`
|
||||
* 这里统一只做协议语义分派，真实保存内容仍由 bufferState 维护。
|
||||
*/
|
||||
function handleCursorSaveRestoreControl(final) {
|
||||
const code = String(final || "");
|
||||
if (code === "s" || code === "7") {
|
||||
saveCurrentCursor();
|
||||
return true;
|
||||
}
|
||||
if (code === "u" || code === "8") {
|
||||
restoreCurrentCursor();
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* 查询类 CSI 统一在这里做协议分派，减少主循环里零散的条件判断：
|
||||
* 1. `DECRQM`：`CSI Ps $ p` / `CSI ? Ps $ p`
|
||||
* 2. `DSR / CPR`：`CSI n` / `CSI ? n`
|
||||
* 3. `DA1 / DA2`：`CSI c` / `CSI > c`
|
||||
*/
|
||||
function handleQueryControl(privateMarker, intermediates, final, values) {
|
||||
const marker = String(privateMarker || "");
|
||||
const middle = String(intermediates || "");
|
||||
const code = String(final || "");
|
||||
|
||||
if (middle === "$" && code === "p" && (marker === "" || marker === "?")) {
|
||||
(Array.isArray(values) && values.length > 0 ? values : [0]).forEach((mode) => {
|
||||
pushModeReport(marker, mode);
|
||||
});
|
||||
return true;
|
||||
}
|
||||
if (code === "n" && (marker === "" || marker === "?")) {
|
||||
pushDeviceStatusResponse(marker, resolveCsiNumber(values, 0, 0));
|
||||
return true;
|
||||
}
|
||||
if (code === "c" && (marker === "" || marker === ">")) {
|
||||
pushDeviceAttributesResponse(marker, resolveCsiNumber(values, 0, 0));
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* ESC 入口目前只保留真正的 ESC 协议语义分派：
|
||||
* 1. `ESC 7 / 8` 保存恢复光标
|
||||
* 2. `ESC D / E / M` index / next line / reverse index
|
||||
*/
|
||||
function handleEscControl(final) {
|
||||
const code = String(final || "");
|
||||
if (handleCursorSaveRestoreControl(code)) {
|
||||
return true;
|
||||
}
|
||||
if (code === "D") {
|
||||
indexDown();
|
||||
return true;
|
||||
}
|
||||
if (code === "E") {
|
||||
nextLine();
|
||||
return true;
|
||||
}
|
||||
if (code === "M") {
|
||||
reverseIndex();
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
|
||||
/**
|
||||
* `CSI` 顶层分派只负责“协议入口 -> 已有子处理器”的路由：
|
||||
* 1. 查询类、模式切换、软重置优先处理，保持和现有协议优先级一致；
|
||||
* 2. 普通 ANSI 模式与无私有前缀的光标/擦除/编辑动作继续复用已有细分处理器；
|
||||
* 3. `SGR` 仍留在 bufferState，因为它直接作用于当前 ansiState 运行态。
|
||||
*/
|
||||
function handleCsiControl(privateMarker, intermediates, final, values) {
|
||||
const marker = String(privateMarker || "");
|
||||
const code = String(final || "");
|
||||
|
||||
if (handleQueryControl(marker, intermediates, code, values)) {
|
||||
return true;
|
||||
}
|
||||
if (marker === "?") {
|
||||
if (code === "h" || code === "l") {
|
||||
const enabled = code === "h";
|
||||
(Array.isArray(values) && values.length > 0 ? values : [0]).forEach((mode) =>
|
||||
handlePrivateMode(enabled, mode)
|
||||
);
|
||||
return true;
|
||||
}
|
||||
return false;
|
||||
}
|
||||
if (marker === "!" && code === "p") {
|
||||
softResetTerminal();
|
||||
return true;
|
||||
}
|
||||
if (!marker && (code === "h" || code === "l")) {
|
||||
values.forEach((value) => {
|
||||
handleAnsiMode(code === "h", value);
|
||||
});
|
||||
return true;
|
||||
}
|
||||
if (marker) {
|
||||
return false;
|
||||
}
|
||||
return (
|
||||
handleCursorControl(code, values) ||
|
||||
handleEraseControl(code, values) ||
|
||||
handleEditControl(code, values) ||
|
||||
handleCursorSaveRestoreControl(code)
|
||||
);
|
||||
}
|
||||
|
||||
return {
|
||||
handleCsiControl,
|
||||
handleCursorControl,
|
||||
handleEraseControl,
|
||||
handleEditControl,
|
||||
handleCursorSaveRestoreControl,
|
||||
handleQueryControl,
|
||||
handleEscControl,
|
||||
handleAnsiMode,
|
||||
handleOscSequence,
|
||||
handlePrivateMode,
|
||||
pushDeviceAttributesResponse,
|
||||
pushDeviceStatusResponse,
|
||||
pushModeReport,
|
||||
pushStatusStringResponse,
|
||||
softResetTerminal
|
||||
};
|
||||
}
|
||||
|
||||
module.exports = {
|
||||
createTerminalVtInputHandler
|
||||
};
|
||||
Reference in New Issue
Block a user