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Copy pathmcppTomlParser.ts
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890 lines (832 loc) · 27.8 KB
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// mcpp.toml 的容错解析层：为代码补全提供结构化信息。
// 设计目标是容错而非校验——用户在编辑器里输入到一半（未闭合的 `[`、字符串、
// 内联表）时不抛异常，而是把已识别的结构连同精确的 0 基行列范围返回。
// 本模块不依赖 vscode API，可在 node --test 下直接测试；extension.ts 负责
// 把这里的纯数据上下文映射为 CompletionItem。
//
// 覆盖的 TOML 子集：段头（含 [[...]] 数组表、单/双引号段）、裸键/引号键/
// 点分键、字符串（含三引号多行串）、整数、布尔、数组与内联表（可嵌套、
// 可跨行）、行注释。CRLF 行尾在进入解析前剥除，列号按剥除后的文本计算。
/** 0 基行列范围，end 为开区间（与 VS Code Range 同构）。 */
export interface TomlRange {
startLine: number;
startCharacter: number;
endLine: number;
endCharacter: number;
}
/** 键/段路径中的一段：已去引号的名字 + 原始 token 的范围（含引号）。 */
export interface TomlKeySegment {
name: string;
quoted: boolean;
range: TomlRange;
}
export type TomlValueKind = "string" | "integer" | "boolean" | "array" | "inlineTable" | "unknown";
/** 值节点。open = true 表示结构未闭合（输入到一半），range 延伸到文档末尾。 */
export interface TomlValueNode {
kind: TomlValueKind;
range: TomlRange;
/** 未闭合（字符串缺右引号、数组缺 ]、内联表缺 }）。 */
open: boolean;
/** 标量原文：字符串为去引号内容（未做转义还原），整数/布尔为原文 token。 */
text?: string;
/** 字符串节点：引号字符。 */
quote?: '"' | "'";
/** 字符串节点：是否三引号多行串。 */
multiline?: boolean;
/** 字符串节点：内容范围（不含引号；未闭合时延伸到扫描终点）。 */
contentRange?: TomlRange;
/** 数组节点：已解析出的元素。 */
elements?: TomlValueNode[];
/** 内联表节点：已解析出的键值条目。 */
entries?: TomlKeyValueNode[];
}
/** 键值对节点：keyPath 为点分键拆出的段数组（如 capi.lua → [capi, lua]）。 */
export interface TomlKeyValueNode {
type: "keyValue";
keyPath: TomlKeySegment[];
range: TomlRange;
/** 缺省表示 `=` 之后没有可用值（含尚未输入的情况）。 */
value?: TomlValueNode;
}
/** 段头节点。open = true 表示 `]` 尚未输入。 */
export interface TomlSectionNode {
type: "section";
/** 段路径段（已去引号，如 [target.'cfg(windows)'.build] → target / cfg(windows) / build）。 */
segments: TomlKeySegment[];
/** 是否为 [[...]] 数组表段头。 */
isArray: boolean;
open: boolean;
range: TomlRange;
/** 段头所在行（0 基）。 */
line: number;
}
export type TomlNode = TomlSectionNode | TomlKeyValueNode;
export interface TomlDocument {
nodes: TomlNode[];
}
/** 段归属语义：top = 文档顶部尚无段头；unknown = 未识别的自定义段；known = 已知段组。 */
export type SectionResolution =
| { kind: "top" }
| { kind: "unknown"; segments: string[] }
| { kind: "known"; group: string };
/** 当前 token 的替换范围（与光标同行的起止列），供补全做显式 range。 */
export interface ReplaceRange {
startCharacter: number;
endCharacter: number;
}
/** 光标的结构化上下文（纯数据）。 */
export type TomlCursorContext =
| {
kind: "section-header";
/** 光标所在 token 之前已解析出的段路径段（去引号）。 */
segments: string[];
isArray: boolean;
replaceRange: ReplaceRange;
}
| {
kind: "key";
section: SectionResolution;
/** 容器路径：顶层语句为 []；内联表内为从语句根键开始的路径（如 simd = { flags = [ { … 深处为 ["simd","flags"]）。 */
containerPath: string[];
/** 同一行点分键中光标 token 之前已输入的段（如 capi.la| → ["capi"]）。 */
keyPrefix: string[];
replaceRange: ReplaceRange;
}
| {
kind: "value";
section: SectionResolution;
/** 所属键的完整路径（含内联表/数组下钻）。 */
keyPath: string[];
/** 光标处值的种类；值尚未开始或不可判定时为 undefined。 */
valueKind: TomlValueKind | undefined;
insideString: boolean;
/** 所在字符串未闭合（不在字符串内时为 false）。 */
stringOpen: boolean;
replaceRange: ReplaceRange;
};
/** 精确匹配的已知段（与 mcpp manifest 层一致）。 */
const KNOWN_SECTIONS: ReadonlySet<string> = new Set([
"package",
"lib",
"build",
"generated_files",
"dependencies",
"dev-dependencies",
"build-dependencies",
"features",
"indices",
"capabilities",
"runtime",
"resources",
"toolchain",
"xlings",
"xlings.workspace",
"xlings.envs",
"workspace",
"workspace.dependencies",
"pack",
"pack.bundle-project",
"language",
"tools.overrides",
]);
/** 参数化段基组：<base>.<name> 归入 <base>（dependencies 系支持命名空间再嵌套）。 */
const PARAMETERIZED_BASES: ReadonlySet<string> = new Set([
"targets",
"profile",
"feature-deps",
"dependencies",
"dev-dependencies",
]);
function resolveGroup(segments: readonly string[]): string | undefined {
const joined = segments.join(".");
if (KNOWN_SECTIONS.has(joined)) {
return joined;
}
const head = segments[0];
if (head === "target") {
// [target.<sel>] 或 [target.<sel>.<子表>]；sel 是三元组或去引号后的
// cfg 表达式，本身不含未引号点，因此子表部分从第三段开始。
if (segments.length <= 2) {
return "target";
}
return resolveGroup(segments.slice(2));
}
if (head === "runtime" && segments.length === 2) {
// [runtime."<capability>"]：带点 capability 名的显式 provider 子表。
return "runtime.capability";
}
if (PARAMETERIZED_BASES.has(head) && segments.length >= 2) {
return head;
}
if (head === "workspace" && segments[1] === "dependencies" && segments.length >= 3) {
return "workspace.dependencies";
}
return undefined;
}
/**
* 把解析出的段路径规范化为语义组。空 segments 表示文档顶部（尚无段头），
* 未识别的段返回 unknown，由调用方区分这两种情况。
*/
export function resolveSection(segments: readonly string[]): SectionResolution {
if (segments.length === 0) {
return { kind: "top" };
}
const group = resolveGroup(segments);
return group === undefined
? { kind: "unknown", segments: [...segments] }
: { kind: "known", group };
}
interface Pos {
line: number;
col: number;
}
/** 内部控制流信号：光标上下文已捕获，提前结束扫描。解析本身永不抛异常。 */
const CONTEXT_FOUND = Symbol("mcppTomlContextFound");
function isBareKeyChar(ch: string): boolean {
return (
(ch >= "a" && ch <= "z") ||
(ch >= "A" && ch <= "Z") ||
(ch >= "0" && ch <= "9") ||
ch === "_" ||
ch === "-"
);
}
/** 逐行容错扫描器。行列均为 0 基，列按剥除 \r 后的文本计算。 */
class Scanner {
private readonly lines: string[];
private line = 0;
private col = 0;
private readonly cursor: Pos | undefined;
/** 光标上下文捕获结果。 */
context: TomlCursorContext | undefined;
/** 扫描过程中最近经过的段头，用于给键/值上下文标注段归属。 */
private currentSection: TomlSectionNode | undefined;
constructor(lines: readonly string[], cursor?: Pos) {
this.lines = lines
.map((text) => (text.endsWith("\r") ? text.slice(0, -1) : text));
if (this.lines.length === 0) {
this.lines.push("");
}
if (cursor !== undefined) {
// 越界坐标钳制到文档内，保证补全在任意光标位置都能得到上下文。
const line = Math.min(Math.max(0, cursor.line), this.lines.length - 1);
const col = Math.min(Math.max(0, cursor.col), this.lines[line].length);
this.cursor = { line, col };
}
}
// ---- 基础游标操作 ----
private pos(): Pos {
return { line: this.line, col: this.col };
}
private eof(): boolean {
return this.line >= this.lines.length;
}
private atEol(): boolean {
return this.eof() || this.col >= this.lines[this.line].length;
}
private peek(): string {
return this.atEol() ? "" : this.lines[this.line][this.col];
}
private peekAt(offset: number): string {
if (this.eof()) {
return "";
}
const text = this.lines[this.line];
return this.col + offset < text.length ? text[this.col + offset] : "";
}
private advance(): void {
if (this.eof()) {
return;
}
this.col += 1;
if (this.col > this.lines[this.line].length) {
this.line += 1;
this.col = 0;
}
}
private samePos(a: Pos, b: Pos): boolean {
return a.line === b.line && a.col === b.col;
}
private cmpPos(a: Pos, b: Pos): number {
return a.line - b.line || a.col - b.col;
}
private skipInlineWs(): void {
while (this.peek() === " " || this.peek() === "\t") {
this.col += 1;
}
}
/** 跳过空白、换行与行注释（# 到行尾；字符串内的 # 不会走到这里）。 */
private skipTrivia(): void {
while (!this.eof()) {
const ch = this.peek();
if (ch === " " || ch === "\t") {
this.col += 1;
continue;
}
if (this.atEol()) {
this.line += 1;
this.col = 0;
continue;
}
if (ch === "#") {
while (!this.atEol()) {
this.col += 1;
}
continue;
}
break;
}
}
private rangeFrom(start: Pos): TomlRange {
return {
startLine: start.line,
startCharacter: start.col,
endLine: this.line,
endCharacter: this.col,
};
}
private sliceText(a: Pos, b: Pos): string {
if (a.line === b.line) {
return this.lines[a.line].slice(a.col, b.col);
}
const parts = [this.lines[a.line].slice(a.col)];
for (let l = a.line + 1; l < b.line; l += 1) {
parts.push(this.lines[l]);
}
parts.push(this.lines[b.line].slice(0, b.col));
return parts.join("\n");
}
// ---- 光标上下文捕获 ----
private cursorReached(): boolean {
const cursor = this.cursor;
return cursor !== undefined && this.cmpPos(this.pos(), cursor) >= 0;
}
/** 光标是否落在范围内（端点含尾：补全时光标常贴在 token 末尾）。 */
private cursorWithin(range: TomlRange): boolean {
const cursor = this.cursor;
if (cursor === undefined) {
return false;
}
if (cursor.line < range.startLine || cursor.line > range.endLine) {
return false;
}
if (cursor.line === range.startLine && cursor.col < range.startCharacter) {
return false;
}
if (cursor.line === range.endLine && cursor.col > range.endCharacter) {
return false;
}
return true;
}
/** 在光标行上向左/右扩展 token（遇 stop 字符停），用于字符串内容等无预扫描范围的替换区间。 */
private expandOnLine(stop: (ch: string) => boolean): ReplaceRange {
const cursor = this.cursor;
if (cursor === undefined) {
return { startCharacter: 0, endCharacter: 0 };
}
const text = this.lines[cursor.line] ?? "";
const at = Math.min(cursor.col, text.length);
let start = at;
let end = at;
while (start > 0 && !stop(text[start - 1])) {
start -= 1;
}
while (end < text.length && !stop(text[end])) {
end += 1;
}
return { startCharacter: start, endCharacter: end };
}
private emptyReplaceRange(): ReplaceRange {
const cursor = this.cursor;
const col = cursor?.col ?? 0;
return { startCharacter: col, endCharacter: col };
}
private static tokenReplaceRange(range: TomlRange): ReplaceRange {
// 键/段 token 保证单行（引号键跨行即视为未闭合而截断在行尾）。
return { startCharacter: range.startCharacter, endCharacter: range.endCharacter };
}
/** 单行范围转替换范围；跨行值（数组/多行串）返回 undefined，由调用方回退。 */
private static singleLineReplaceRange(range: TomlRange): ReplaceRange | undefined {
if (range.startLine !== range.endLine) {
return undefined;
}
return { startCharacter: range.startCharacter, endCharacter: range.endCharacter };
}
private sectionResolution(): SectionResolution {
if (this.currentSection === undefined) {
return { kind: "top" };
}
return resolveSection(this.currentSection.segments.map((segment) => segment.name));
}
private capture(context: TomlCursorContext): never {
this.context = context;
throw CONTEXT_FOUND;
}
private captureKey(containerPath: readonly string[], keyPrefix: readonly string[], token?: TomlRange): never {
this.capture({
kind: "key",
section: this.sectionResolution(),
containerPath: [...containerPath],
keyPrefix: [...keyPrefix],
replaceRange: token !== undefined ? Scanner.tokenReplaceRange(token) : this.emptyReplaceRange(),
});
}
private captureValue(
keyPath: readonly string[],
valueKind: TomlValueKind | undefined,
options?: { insideString?: boolean; stringOpen?: boolean; replaceRange?: ReplaceRange },
): never {
this.capture({
kind: "value",
section: this.sectionResolution(),
keyPath: [...keyPath],
valueKind,
insideString: options?.insideString ?? false,
stringOpen: options?.stringOpen ?? false,
replaceRange: options?.replaceRange ?? this.emptyReplaceRange(),
});
}
private captureHeader(segments: readonly TomlKeySegment[], isArray: boolean, token?: TomlRange): never {
this.capture({
kind: "section-header",
segments: segments.map((segment) => segment.name),
isArray,
replaceRange: token !== undefined ? Scanner.tokenReplaceRange(token) : this.emptyReplaceRange(),
});
}
/** 扫描到文档末尾仍未捕获光标上下文时的兜底：当前段内的顶层键位置。 */
finalContext(): TomlCursorContext {
return {
kind: "key",
section: this.sectionResolution(),
containerPath: [],
keyPrefix: [],
replaceRange: this.emptyReplaceRange(),
};
}
// ---- 结构扫描 ----
scan(): TomlNode[] {
const nodes: TomlNode[] = [];
while (!this.eof()) {
this.skipTrivia();
// 光标落在语句之间的空白/注释里：视为顶层键位置（新语句的起点）。
if (this.cursorReached()) {
this.captureKey([], []);
}
if (this.eof()) {
break;
}
const start = this.pos();
if (this.peek() === "[") {
nodes.push(this.scanHeader(start));
} else {
const keyValue = this.scanKeyValue([]);
if (keyValue !== undefined) {
nodes.push(keyValue);
}
}
// 进度保护：任何无法识别的垃圾字符都必须被消费，保证容错扫描必然终止。
if (this.samePos(this.pos(), start)) {
this.advance();
}
}
return nodes;
}
/** 段头：[a.b] / [[a.b]] / 引号段；未闭合（缺 ]）时 open = true 并跳过该行剩余内容。 */
private scanHeader(start: Pos): TomlSectionNode {
this.advance(); // [
let isArray = false;
if (this.peek() === "[") {
isArray = true;
this.advance();
}
const segments: TomlKeySegment[] = [];
let open = true;
for (;;) {
this.skipInlineWs();
// 光标在段之间的空白/点号附近（如 `[targets.` 之后）。
if (this.cursorReached()) {
this.captureHeader(segments, isArray);
}
const segment = this.scanKeySegment();
if (segment === undefined) {
break;
}
if (this.cursorWithin(segment.range)) {
this.captureHeader(segments, isArray, segment.range);
}
segments.push(segment);
this.skipInlineWs();
if (this.peek() === ".") {
this.advance();
continue;
}
break;
}
this.skipInlineWs();
if (this.cursorReached()) {
this.captureHeader(segments, isArray);
}
if (this.peek() === "]") {
this.advance();
if (isArray && this.peek() === "]") {
this.advance();
}
// 容错：[[x] 只写了一个 ] 也视为已闭合。
open = false;
}
if (open) {
// 未闭合段头：跳过该行剩余内容，避免残余字符被当作下一条语句。
while (!this.atEol()) {
this.col += 1;
}
}
const node: TomlSectionNode = {
type: "section",
segments,
isArray,
open,
range: this.rangeFrom(start),
line: start.line,
};
this.currentSection = node;
return node;
}
/** 单个键/段路径段：裸键或单/双引号键（引号键跨行即按未闭合截断）。 */
private scanKeySegment(): TomlKeySegment | undefined {
const start = this.pos();
const quote = this.peek();
if (quote === '"' || quote === "'") {
this.advance();
const contentStart = this.pos();
while (!this.atEol() && this.peek() !== quote) {
// 双引号键内的转义（如 \"）不结束键。
if (quote === '"' && this.peek() === "\\" && this.col + 1 < this.lines[this.line].length) {
this.col += 2;
continue;
}
this.col += 1;
}
const contentEnd = this.pos();
if (this.peek() === quote) {
this.advance();
}
return {
name: this.sliceText(contentStart, contentEnd),
quoted: true,
range: this.rangeFrom(start),
};
}
if (!isBareKeyChar(quote)) {
return undefined;
}
while (isBareKeyChar(this.peek())) {
this.col += 1;
}
return {
name: this.sliceText(start, this.pos()),
quoted: false,
range: this.rangeFrom(start),
};
}
/**
* 键值对：点分键 [= 值]。containerPath 是内联表递归时下钻的键路径
* （顶层语句为 []）。无法识别出键也没有值时返回 undefined。
*/
private scanKeyValue(containerPath: readonly string[]): TomlKeyValueNode | undefined {
const start = this.pos();
const segments: TomlKeySegment[] = [];
for (;;) {
this.skipInlineWs();
// 光标在键槽位的空白处（如 `{ ` 之后、键未开始时）。
if (this.cursorReached()) {
this.captureKey(containerPath, segments.map((segment) => segment.name));
}
const segment = this.scanKeySegment();
if (segment === undefined) {
break;
}
if (this.cursorWithin(segment.range)) {
this.captureKey(containerPath, segments.map((segment) => segment.name), segment.range);
}
segments.push(segment);
this.skipInlineWs();
if (this.peek() === ".") {
this.advance();
continue;
}
break;
}
this.skipInlineWs();
// 光标在键与 = 之间（如 `name |`）：仍算键位置。
if (this.cursorReached()) {
this.captureKey(containerPath, segments.map((segment) => segment.name));
}
const keyNames = segments.map((segment) => segment.name);
let value: TomlValueNode | undefined;
if (this.peek() === "=") {
this.advance();
this.skipInlineWs();
const valuePath = containerPath.concat(keyNames);
// 光标在 = 之后、值未开始（如 `kind = |`）。
if (this.cursorReached()) {
// 光标后方同行还有值 token（光标恰在 token 首字符、或在 = 与 token
// 之间的空白上）时，替换范围要覆盖整个 token，否则补全插入后原文残留。
if (!this.atEol() && this.peek() !== "#") {
const ahead = this.scanValue(valuePath); // 光标落在 token 内时由 scanValue 捕获
this.captureValue(valuePath, ahead.kind, {
replaceRange: Scanner.singleLineReplaceRange(ahead.range) ?? this.emptyReplaceRange(),
});
}
this.captureValue(valuePath, undefined);
}
// 值必须在同行开始（TOML 本就如此）；行尾没有值则按缺失处理。
if (!this.atEol() && this.peek() !== "#") {
value = this.scanValue(valuePath);
}
}
if (segments.length === 0 && value === undefined) {
return undefined;
}
return { type: "keyValue", keyPath: segments, range: this.rangeFrom(start), value };
}
private scanValue(keyPath: readonly string[]): TomlValueNode {
const ch = this.peek();
if (ch === '"' || ch === "'") {
return this.scanStringValue(keyPath);
}
if (ch === "[") {
return this.scanArrayValue(keyPath);
}
if (ch === "{") {
return this.scanInlineTableValue(keyPath);
}
return this.scanBareValue(keyPath);
}
/** 字符串：单/双引号单行串与三引号多行串；未闭合时 open = true。 */
private scanStringValue(keyPath: readonly string[]): TomlValueNode {
const start = this.pos();
const quote = this.peek() as '"' | "'";
this.advance();
let multiline = false;
let open = true;
let contentStart = this.pos();
let contentEnd = this.pos();
if (this.peek() === quote) {
this.advance();
if (this.peek() === quote) {
// 三引号多行串。
multiline = true;
this.advance();
contentStart = this.pos();
} else {
// 空字符串 "" / ''。
open = false;
}
}
let closeStart: Pos | undefined;
if (open) {
while (!this.eof()) {
if (!multiline && this.atEol()) {
break; // 单行串跨行 → 未闭合
}
const ch = this.peek();
if (ch === "\\" && quote === '"') {
// 双引号串内的转义：跳过下一个字符（\" 不结束串）。
this.advance();
if (!this.eof() && (multiline || !this.atEol())) {
this.advance();
}
continue;
}
if (ch === quote) {
if (multiline) {
if (this.peekAt(1) === quote && this.peekAt(2) === quote) {
contentEnd = this.pos();
closeStart = this.pos();
this.advance();
this.advance();
this.advance();
open = false;
break;
}
this.advance();
continue;
}
contentEnd = this.pos();
closeStart = this.pos();
this.advance();
open = false;
break;
}
this.advance();
}
if (open) {
contentEnd = this.pos();
}
}
const node: TomlValueNode = {
kind: "string",
range: this.rangeFrom(start),
open,
text: this.sliceText(contentStart, contentEnd),
quote,
multiline,
contentRange: {
startLine: contentStart.line,
startCharacter: contentStart.col,
endLine: contentEnd.line,
endCharacter: contentEnd.col,
},
};
if (this.cursorWithin(node.range)) {
const cursor = this.cursor;
if (cursor !== undefined) {
const afterOpen = this.cmpPos(cursor, contentStart) >= 0;
const beforeClose = closeStart === undefined || this.cmpPos(cursor, closeStart) <= 0;
const insideString = afterOpen && beforeClose;
// 字符串内容的替换范围：扩展到本行引号边界，并钳制在内容范围内。
let replaceRange = this.emptyReplaceRange();
if (insideString) {
const expanded = this.expandOnLine((ch) => ch === quote);
const minCol = contentStart.line === cursor.line ? contentStart.col : 0;
const maxCol =
contentEnd.line === cursor.line ? contentEnd.col : this.lines[cursor.line]?.length ?? 0;
replaceRange = {
startCharacter: Math.max(expanded.startCharacter, minCol),
endCharacter: Math.min(Math.max(expanded.endCharacter, minCol), maxCol),
};
}
this.captureValue(keyPath, "string", {
insideString,
stringOpen: open && afterOpen,
replaceRange,
});
}
}
return node;
}
/** 数组：可跨行，元素递归解析；缺 ] 时 open = true。 */
private scanArrayValue(keyPath: readonly string[]): TomlValueNode {
const start = this.pos();
this.advance(); // [
const elements: TomlValueNode[] = [];
let open = true;
for (;;) {
this.skipTrivia();
// 光标在元素槽位（如 `sources = [ ` 之后）。
if (this.cursorReached()) {
this.captureValue(keyPath, undefined);
}
if (this.eof()) {
break;
}
const ch = this.peek();
if (ch === "]") {
this.advance();
open = false;
break;
}
if (ch === ",") {
this.advance();
continue;
}
const elementStart = this.pos();
elements.push(this.scanValue(keyPath));
if (this.samePos(this.pos(), elementStart)) {
this.advance(); // 进度保护
}
}
return { kind: "array", range: this.rangeFrom(start), open, elements };
}
/** 内联表：可嵌套、可跨行，条目是完整键值对；缺 } 时 open = true。 */
private scanInlineTableValue(keyPath: readonly string[]): TomlValueNode {
const start = this.pos();
this.advance(); // {
const entries: TomlKeyValueNode[] = [];
let open = true;
for (;;) {
this.skipTrivia();
// 光标在条目键槽位（如 `simd = { flags = [ { ` 深处）。
if (this.cursorReached()) {
this.captureKey(keyPath, []);
}
if (this.eof()) {
break;
}
const ch = this.peek();
if (ch === "}") {
this.advance();
open = false;
break;
}
if (ch === ",") {
this.advance();
continue;
}
const entryStart = this.pos();
const entry = this.scanKeyValue(keyPath);
if (entry !== undefined) {
entries.push(entry);
}
if (this.samePos(this.pos(), entryStart)) {
this.advance(); // 进度保护
}
}
return { kind: "inlineTable", range: this.rangeFrom(start), open, entries };
}
/** 裸值 token：布尔、整数，其余归为 unknown（容错，不校验合法性）。 */
private scanBareValue(keyPath: readonly string[]): TomlValueNode {
const start = this.pos();
let end = this.pos();
while (!this.atEol()) {
const ch = this.peek();
if (ch === "," || ch === "]" || ch === "}" || ch === "[" || ch === "{" || ch === "#") {
break;
}
this.col += 1;
if (ch !== " " && ch !== "\t") {
end = this.pos();
}
}
const text = this.sliceText(start, end);
let kind: TomlValueKind = "unknown";
if (text === "true" || text === "false") {
kind = "boolean";
} else if (/^[+-]?\d[\d_]*$/.test(text)) {
kind = "integer";
}
const range: TomlRange = {
startLine: start.line,
startCharacter: start.col,
endLine: end.line,
endCharacter: end.col,
};
if (this.cursorWithin(range)) {
this.captureValue(keyPath, kind, { replaceRange: Scanner.tokenReplaceRange(range) });
}
return { kind, range, open: false, text };
}
}
/** 容错解析整个文档，产出带 0 基行列范围的节点树。永不抛异常。 */
export function parseMcppToml(lines: readonly string[]): TomlDocument {
const scanner = new Scanner(lines);
return { nodes: scanner.scan() };
}
/**
* 计算光标的结构化上下文。line / character 均为 0 基（character 按剥除
* \r 后的文本计算）；越界坐标会被钳制到文档内。永不抛异常。
*/
export function contextAt(lines: readonly string[], line: number, character: number): TomlCursorContext {
const scanner = new Scanner(lines, { line, col: character });
try {
scanner.scan();
} catch (error) {
if (error === CONTEXT_FOUND && scanner.context !== undefined) {
return scanner.context;
}
throw error;
}
// 扫描结束仍未命中：光标在文档末尾的空白处，视为当前段内的顶层键位置。
return scanner.finalContext();
}