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printer.js
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Thu, Dec 26, 09:29

printer.js
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"use strict";
Object.defineProperty(exports, "__esModule", {
value: true
});
exports.default = void 0;
var _buffer = _interopRequireDefault(require("./buffer"));
var n = _interopRequireWildcard(require("./node"));
var t = _interopRequireWildcard(require("@babel/types"));
var generatorFunctions = _interopRequireWildcard(require("./generators"));
function _getRequireWildcardCache() { if (typeof WeakMap !== "function") return null; var cache = new WeakMap(); _getRequireWildcardCache = function () { return cache; }; return cache; }
function _interopRequireWildcard(obj) { if (obj && obj.__esModule) { return obj; } if (obj === null || typeof obj !== "object" && typeof obj !== "function") { return { default: obj }; } var cache = _getRequireWildcardCache(); if (cache && cache.has(obj)) { return cache.get(obj); } var newObj = {}; var hasPropertyDescriptor = Object.defineProperty && Object.getOwnPropertyDescriptor; for (var key in obj) { if (Object.prototype.hasOwnProperty.call(obj, key)) { var desc = hasPropertyDescriptor ? Object.getOwnPropertyDescriptor(obj, key) : null; if (desc && (desc.get || desc.set)) { Object.defineProperty(newObj, key, desc); } else { newObj[key] = obj[key]; } } } newObj.default = obj; if (cache) { cache.set(obj, newObj); } return newObj; }
function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }
const SCIENTIFIC_NOTATION = /e/i;
const ZERO_DECIMAL_INTEGER = /\.0+$/;
const NON_DECIMAL_LITERAL = /^0[box]/;
const PURE_ANNOTATION_RE = /^\s*[@#]__PURE__\s*$/;
class Printer {
constructor(format, map) {
this.inForStatementInitCounter = 0;
this._printStack = [];
this._indent = 0;
this._insideAux = false;
this._printedCommentStarts = {};
this._parenPushNewlineState = null;
this._noLineTerminator = false;
this._printAuxAfterOnNextUserNode = false;
this._printedComments = new WeakSet();
this._endsWithInteger = false;
this._endsWithWord = false;
this.format = format || {};
this._buf = new _buffer.default(map);
}
generate(ast) {
this.print(ast);
this._maybeAddAuxComment();
return this._buf.get();
}
indent() {
if (this.format.compact || this.format.concise) return;
this._indent++;
}
dedent() {
if (this.format.compact || this.format.concise) return;
this._indent--;
}
semicolon(force = false) {
this._maybeAddAuxComment();
this._append(";", !force);
}
rightBrace() {
if (this.format.minified) {
this._buf.removeLastSemicolon();
}
this.token("}");
}
space(force = false) {
if (this.format.compact) return;
if (this._buf.hasContent() && !this.endsWith(" ") && !this.endsWith("\n") || force) {
this._space();
}
}
word(str) {
if (this._endsWithWord || this.endsWith("/") && str.indexOf("/") === 0) {
this._space();
}
this._maybeAddAuxComment();
this._append(str);
this._endsWithWord = true;
}
number(str) {
this.word(str);
this._endsWithInteger = Number.isInteger(+str) && !NON_DECIMAL_LITERAL.test(str) && !SCIENTIFIC_NOTATION.test(str) && !ZERO_DECIMAL_INTEGER.test(str) && str[str.length - 1] !== ".";
}
token(str) {
if (str === "--" && this.endsWith("!") || str[0] === "+" && this.endsWith("+") || str[0] === "-" && this.endsWith("-") || str[0] === "." && this._endsWithInteger) {
this._space();
}
this._maybeAddAuxComment();
this._append(str);
}
newline(i) {
if (this.format.retainLines || this.format.compact) return;
if (this.format.concise) {
this.space();
return;
}
if (this.endsWith("\n\n")) return;
if (typeof i !== "number") i = 1;
i = Math.min(2, i);
if (this.endsWith("{\n") || this.endsWith(":\n")) i--;
if (i <= 0) return;
for (let j = 0; j < i; j++) {
this._newline();
}
}
endsWith(str) {
return this._buf.endsWith(str);
}
removeTrailingNewline() {
this._buf.removeTrailingNewline();
}
exactSource(loc, cb) {
this._catchUp("start", loc);
this._buf.exactSource(loc, cb);
}
source(prop, loc) {
this._catchUp(prop, loc);
this._buf.source(prop, loc);
}
withSource(prop, loc, cb) {
this._catchUp(prop, loc);
this._buf.withSource(prop, loc, cb);
}
_space() {
this._append(" ", true);
}
_newline() {
this._append("\n", true);
}
_append(str, queue = false) {
this._maybeAddParen(str);
this._maybeIndent(str);
if (queue) this._buf.queue(str);else this._buf.append(str);
this._endsWithWord = false;
this._endsWithInteger = false;
}
_maybeIndent(str) {
if (this._indent && this.endsWith("\n") && str[0] !== "\n") {
this._buf.queue(this._getIndent());
}
}
_maybeAddParen(str) {
const parenPushNewlineState = this._parenPushNewlineState;
if (!parenPushNewlineState) return;
let i;
for (i = 0; i < str.length && str[i] === " "; i++) continue;
if (i === str.length) {
return;
}
const cha = str[i];
if (cha !== "\n") {
if (cha !== "/" || i + 1 === str.length) {
this._parenPushNewlineState = null;
return;
}
const chaPost = str[i + 1];
if (chaPost === "*") {
if (PURE_ANNOTATION_RE.test(str.slice(i + 2, str.length - 2))) {
return;
}
} else if (chaPost !== "/") {
this._parenPushNewlineState = null;
return;
}
}
this.token("(");
this.indent();
parenPushNewlineState.printed = true;
}
_catchUp(prop, loc) {
if (!this.format.retainLines) return;
const pos = loc ? loc[prop] : null;
if ((pos == null ? void 0 : pos.line) != null) {
const count = pos.line - this._buf.getCurrentLine();
for (let i = 0; i < count; i++) {
this._newline();
}
}
}
_getIndent() {
return this.format.indent.style.repeat(this._indent);
}
startTerminatorless(isLabel = false) {
if (isLabel) {
this._noLineTerminator = true;
return null;
} else {
return this._parenPushNewlineState = {
printed: false
};
}
}
endTerminatorless(state) {
this._noLineTerminator = false;
if (state == null ? void 0 : state.printed) {
this.dedent();
this.newline();
this.token(")");
}
}
print(node, parent) {
if (!node) return;
const oldConcise = this.format.concise;
if (node._compact) {
this.format.concise = true;
}
const printMethod = this[node.type];
if (!printMethod) {
throw new ReferenceError(`unknown node of type ${JSON.stringify(node.type)} with constructor ${JSON.stringify(node == null ? void 0 : node.constructor.name)}`);
}
this._printStack.push(node);
const oldInAux = this._insideAux;
this._insideAux = !node.loc;
this._maybeAddAuxComment(this._insideAux && !oldInAux);
let needsParens = n.needsParens(node, parent, this._printStack);
if (this.format.retainFunctionParens && node.type === "FunctionExpression" && node.extra && node.extra.parenthesized) {
needsParens = true;
}
if (needsParens) this.token("(");
this._printLeadingComments(node);
const loc = t.isProgram(node) || t.isFile(node) ? null : node.loc;
this.withSource("start", loc, () => {
printMethod.call(this, node, parent);
});
this._printTrailingComments(node);
if (needsParens) this.token(")");
this._printStack.pop();
this.format.concise = oldConcise;
this._insideAux = oldInAux;
}
_maybeAddAuxComment(enteredPositionlessNode) {
if (enteredPositionlessNode) this._printAuxBeforeComment();
if (!this._insideAux) this._printAuxAfterComment();
}
_printAuxBeforeComment() {
if (this._printAuxAfterOnNextUserNode) return;
this._printAuxAfterOnNextUserNode = true;
const comment = this.format.auxiliaryCommentBefore;
if (comment) {
this._printComment({
type: "CommentBlock",
value: comment
});
}
}
_printAuxAfterComment() {
if (!this._printAuxAfterOnNextUserNode) return;
this._printAuxAfterOnNextUserNode = false;
const comment = this.format.auxiliaryCommentAfter;
if (comment) {
this._printComment({
type: "CommentBlock",
value: comment
});
}
}
getPossibleRaw(node) {
const extra = node.extra;
if (extra && extra.raw != null && extra.rawValue != null && node.value === extra.rawValue) {
return extra.raw;
}
}
printJoin(nodes, parent, opts = {}) {
if (!(nodes == null ? void 0 : nodes.length)) return;
if (opts.indent) this.indent();
const newlineOpts = {
addNewlines: opts.addNewlines
};
for (let i = 0; i < nodes.length; i++) {
const node = nodes[i];
if (!node) continue;
if (opts.statement) this._printNewline(true, node, parent, newlineOpts);
this.print(node, parent);
if (opts.iterator) {
opts.iterator(node, i);
}
if (opts.separator && i < nodes.length - 1) {
opts.separator.call(this);
}
if (opts.statement) this._printNewline(false, node, parent, newlineOpts);
}
if (opts.indent) this.dedent();
}
printAndIndentOnComments(node, parent) {
const indent = node.leadingComments && node.leadingComments.length > 0;
if (indent) this.indent();
this.print(node, parent);
if (indent) this.dedent();
}
printBlock(parent) {
const node = parent.body;
if (!t.isEmptyStatement(node)) {
this.space();
}
this.print(node, parent);
}
_printTrailingComments(node) {
this._printComments(this._getComments(false, node));
}
_printLeadingComments(node) {
this._printComments(this._getComments(true, node), true);
}
printInnerComments(node, indent = true) {
var _node$innerComments;
if (!((_node$innerComments = node.innerComments) == null ? void 0 : _node$innerComments.length)) return;
if (indent) this.indent();
this._printComments(node.innerComments);
if (indent) this.dedent();
}
printSequence(nodes, parent, opts = {}) {
opts.statement = true;
return this.printJoin(nodes, parent, opts);
}
printList(items, parent, opts = {}) {
if (opts.separator == null) {
opts.separator = commaSeparator;
}
return this.printJoin(items, parent, opts);
}
_printNewline(leading, node, parent, opts) {
if (this.format.retainLines || this.format.compact) return;
if (this.format.concise) {
this.space();
return;
}
let lines = 0;
if (this._buf.hasContent()) {
if (!leading) lines++;
if (opts.addNewlines) lines += opts.addNewlines(leading, node) || 0;
const needs = leading ? n.needsWhitespaceBefore : n.needsWhitespaceAfter;
if (needs(node, parent)) lines++;
}
this.newline(lines);
}
_getComments(leading, node) {
return node && (leading ? node.leadingComments : node.trailingComments) || [];
}
_printComment(comment, skipNewLines) {
if (!this.format.shouldPrintComment(comment.value)) return;
if (comment.ignore) return;
if (this._printedComments.has(comment)) return;
this._printedComments.add(comment);
if (comment.start != null) {
if (this._printedCommentStarts[comment.start]) return;
this._printedCommentStarts[comment.start] = true;
}
const isBlockComment = comment.type === "CommentBlock";
const printNewLines = isBlockComment && !skipNewLines && !this._noLineTerminator;
if (printNewLines && this._buf.hasContent()) this.newline(1);
if (!this.endsWith("[") && !this.endsWith("{")) this.space();
let val = !isBlockComment && !this._noLineTerminator ? `//${comment.value}\n` : `/*${comment.value}*/`;
if (isBlockComment && this.format.indent.adjustMultilineComment) {
var _comment$loc;
const offset = (_comment$loc = comment.loc) == null ? void 0 : _comment$loc.start.column;
if (offset) {
const newlineRegex = new RegExp("\\n\\s{1," + offset + "}", "g");
val = val.replace(newlineRegex, "\n");
}
const indentSize = Math.max(this._getIndent().length, this.format.retainLines ? 0 : this._buf.getCurrentColumn());
val = val.replace(/\n(?!$)/g, `\n${" ".repeat(indentSize)}`);
}
if (this.endsWith("/")) this._space();
this.withSource("start", comment.loc, () => {
this._append(val);
});
if (printNewLines) this.newline(1);
}
_printComments(comments, inlinePureAnnotation) {
if (!(comments == null ? void 0 : comments.length)) return;
if (inlinePureAnnotation && comments.length === 1 && PURE_ANNOTATION_RE.test(comments[0].value)) {
this._printComment(comments[0], this._buf.hasContent() && !this.endsWith("\n"));
} else {
for (const comment of comments) {
this._printComment(comment);
}
}
}
printAssertions(node) {
var _node$assertions;
if ((_node$assertions = node.assertions) == null ? void 0 : _node$assertions.length) {
this.space();
this.word("assert");
this.space();
this.token("{");
this.space();
this.printList(node.assertions, node);
this.space();
this.token("}");
}
}
}
exports.default = Printer;
Object.assign(Printer.prototype, generatorFunctions);
function commaSeparator() {
this.token(",");
this.space();
}

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