vue hello world项目
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3 years ago
"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
const SPACES_RE = /^[ \t]+$/;
class Buffer {
constructor(map) {
this._map = null;
this._buf = "";
this._last = 0;
this._queue = [];
this._position = {
line: 1,
column: 0
};
this._sourcePosition = {
identifierName: null,
line: null,
column: null,
filename: null
};
this._disallowedPop = null;
this._map = map;
}
get() {
this._flush();
const map = this._map;
const result = {
code: this._buf.trimRight(),
map: null,
rawMappings: map == null ? void 0 : map.getRawMappings()
};
if (map) {
Object.defineProperty(result, "map", {
configurable: true,
enumerable: true,
get() {
return this.map = map.get();
},
set(value) {
Object.defineProperty(this, "map", {
value,
writable: true
});
}
});
}
return result;
}
append(str) {
this._flush();
const {
line,
column,
filename,
identifierName,
force
} = this._sourcePosition;
this._append(str, line, column, identifierName, filename, force);
}
queue(str) {
if (str === "\n") {
while (this._queue.length > 0 && SPACES_RE.test(this._queue[0][0])) {
this._queue.shift();
}
}
const {
line,
column,
filename,
identifierName,
force
} = this._sourcePosition;
this._queue.unshift([str, line, column, identifierName, filename, force]);
}
_flush() {
let item;
while (item = this._queue.pop()) {
this._append(...item);
}
}
_append(str, line, column, identifierName, filename, force) {
this._buf += str;
this._last = str.charCodeAt(str.length - 1);
let i = str.indexOf("\n");
let last = 0;
if (i !== 0) {
this._mark(line, column, identifierName, filename, force);
}
while (i !== -1) {
this._position.line++;
this._position.column = 0;
last = i + 1;
if (last < str.length) {
this._mark(++line, 0, identifierName, filename, force);
}
i = str.indexOf("\n", last);
}
this._position.column += str.length - last;
}
_mark(line, column, identifierName, filename, force) {
var _this$_map;
(_this$_map = this._map) == null ? void 0 : _this$_map.mark(this._position.line, this._position.column, line, column, identifierName, filename, force);
}
removeTrailingNewline() {
if (this._queue.length > 0 && this._queue[0][0] === "\n") {
this._queue.shift();
}
}
removeLastSemicolon() {
if (this._queue.length > 0 && this._queue[0][0] === ";") {
this._queue.shift();
}
}
getLastChar() {
let last;
if (this._queue.length > 0) {
const str = this._queue[0][0];
last = str.charCodeAt(0);
} else {
last = this._last;
}
return last;
}
endsWithCharAndNewline() {
const queue = this._queue;
if (queue.length > 0) {
const last = queue[0][0];
const lastCp = last.charCodeAt(0);
if (lastCp !== 10) return;
if (queue.length > 1) {
const secondLast = queue[1][0];
return secondLast.charCodeAt(0);
} else {
return this._last;
}
}
}
hasContent() {
return this._queue.length > 0 || !!this._last;
}
exactSource(loc, cb) {
this.source("start", loc, true);
cb();
this.source("end", loc);
this._disallowPop("start", loc);
}
source(prop, loc, force) {
if (prop && !loc) return;
this._normalizePosition(prop, loc, this._sourcePosition, force);
}
withSource(prop, loc, cb) {
if (!this._map) return cb();
const originalLine = this._sourcePosition.line;
const originalColumn = this._sourcePosition.column;
const originalFilename = this._sourcePosition.filename;
const originalIdentifierName = this._sourcePosition.identifierName;
this.source(prop, loc);
cb();
if ((!this._sourcePosition.force || this._sourcePosition.line !== originalLine || this._sourcePosition.column !== originalColumn || this._sourcePosition.filename !== originalFilename) && (!this._disallowedPop || this._disallowedPop.line !== originalLine || this._disallowedPop.column !== originalColumn || this._disallowedPop.filename !== originalFilename)) {
this._sourcePosition.line = originalLine;
this._sourcePosition.column = originalColumn;
this._sourcePosition.filename = originalFilename;
this._sourcePosition.identifierName = originalIdentifierName;
this._sourcePosition.force = false;
this._disallowedPop = null;
}
}
_disallowPop(prop, loc) {
if (prop && !loc) return;
this._disallowedPop = this._normalizePosition(prop, loc);
}
_normalizePosition(prop, loc, targetObj, force) {
const pos = loc ? loc[prop] : null;
if (targetObj === undefined) {
targetObj = {
identifierName: null,
line: null,
column: null,
filename: null,
force: false
};
}
const origLine = targetObj.line;
const origColumn = targetObj.column;
const origFilename = targetObj.filename;
targetObj.identifierName = prop === "start" && (loc == null ? void 0 : loc.identifierName) || null;
targetObj.line = pos == null ? void 0 : pos.line;
targetObj.column = pos == null ? void 0 : pos.column;
targetObj.filename = loc == null ? void 0 : loc.filename;
if (force || targetObj.line !== origLine || targetObj.column !== origColumn || targetObj.filename !== origFilename) {
targetObj.force = force;
}
return targetObj;
}
getCurrentColumn() {
const extra = this._queue.reduce((acc, item) => item[0] + acc, "");
const lastIndex = extra.lastIndexOf("\n");
return lastIndex === -1 ? this._position.column + extra.length : extra.length - 1 - lastIndex;
}
getCurrentLine() {
const extra = this._queue.reduce((acc, item) => item[0] + acc, "");
let count = 0;
for (let i = 0; i < extra.length; i++) {
if (extra[i] === "\n") count++;
}
return this._position.line + count;
}
}
exports.default = Buffer;