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| Current File : //proc/self/root/home/saurabh/.npm/_npx/249ca9fcd30c476a/node_modules/recast/lib/util.js |
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
exports.isTrailingCommaEnabled = exports.getParentExportDeclaration = exports.isExportDeclaration = exports.fixFaultyLocations = exports.getTrueLoc = exports.composeSourceMaps = exports.copyPos = exports.comparePos = exports.getUnionOfKeys = exports.getOption = void 0;
var tslib_1 = require("tslib");
var assert_1 = tslib_1.__importDefault(require("assert"));
var types = tslib_1.__importStar(require("ast-types"));
var n = types.namedTypes;
var source_map_1 = tslib_1.__importDefault(require("source-map"));
var SourceMapConsumer = source_map_1.default.SourceMapConsumer;
var SourceMapGenerator = source_map_1.default.SourceMapGenerator;
var hasOwn = Object.prototype.hasOwnProperty;
function getOption(options, key, defaultValue) {
if (options && hasOwn.call(options, key)) {
return options[key];
}
return defaultValue;
}
exports.getOption = getOption;
function getUnionOfKeys() {
var args = [];
for (var _i = 0; _i < arguments.length; _i++) {
args[_i] = arguments[_i];
}
var result = {};
var argc = args.length;
for (var i = 0; i < argc; ++i) {
var keys = Object.keys(args[i]);
var keyCount = keys.length;
for (var j = 0; j < keyCount; ++j) {
result[keys[j]] = true;
}
}
return result;
}
exports.getUnionOfKeys = getUnionOfKeys;
function comparePos(pos1, pos2) {
return pos1.line - pos2.line || pos1.column - pos2.column;
}
exports.comparePos = comparePos;
function copyPos(pos) {
return {
line: pos.line,
column: pos.column,
};
}
exports.copyPos = copyPos;
function composeSourceMaps(formerMap, latterMap) {
if (formerMap) {
if (!latterMap) {
return formerMap;
}
}
else {
return latterMap || null;
}
var smcFormer = new SourceMapConsumer(formerMap);
var smcLatter = new SourceMapConsumer(latterMap);
var smg = new SourceMapGenerator({
file: latterMap.file,
sourceRoot: latterMap.sourceRoot,
});
var sourcesToContents = {};
smcLatter.eachMapping(function (mapping) {
var origPos = smcFormer.originalPositionFor({
line: mapping.originalLine,
column: mapping.originalColumn,
});
var sourceName = origPos.source;
if (sourceName === null) {
return;
}
smg.addMapping({
source: sourceName,
original: copyPos(origPos),
generated: {
line: mapping.generatedLine,
column: mapping.generatedColumn,
},
name: mapping.name,
});
var sourceContent = smcFormer.sourceContentFor(sourceName);
if (sourceContent && !hasOwn.call(sourcesToContents, sourceName)) {
sourcesToContents[sourceName] = sourceContent;
smg.setSourceContent(sourceName, sourceContent);
}
});
return smg.toJSON();
}
exports.composeSourceMaps = composeSourceMaps;
function getTrueLoc(node, lines) {
// It's possible that node is newly-created (not parsed by Esprima),
// in which case it probably won't have a .loc property (or an
// .original property for that matter). That's fine; we'll just
// pretty-print it as usual.
if (!node.loc) {
return null;
}
var result = {
start: node.loc.start,
end: node.loc.end,
};
function include(node) {
expandLoc(result, node.loc);
}
// If the node is an export declaration and its .declaration has any
// decorators, their locations might contribute to the true start/end
// positions of the export declaration node.
if (node.declaration &&
node.declaration.decorators &&
isExportDeclaration(node)) {
node.declaration.decorators.forEach(include);
}
if (comparePos(result.start, result.end) < 0) {
// Trim leading whitespace.
result.start = copyPos(result.start);
lines.skipSpaces(result.start, false, true);
if (comparePos(result.start, result.end) < 0) {
// Trim trailing whitespace, if the end location is not already the
// same as the start location.
result.end = copyPos(result.end);
lines.skipSpaces(result.end, true, true);
}
}
// If the node has any comments, their locations might contribute to
// the true start/end positions of the node.
if (node.comments) {
node.comments.forEach(include);
}
return result;
}
exports.getTrueLoc = getTrueLoc;
function expandLoc(parentLoc, childLoc) {
if (parentLoc && childLoc) {
if (comparePos(childLoc.start, parentLoc.start) < 0) {
parentLoc.start = childLoc.start;
}
if (comparePos(parentLoc.end, childLoc.end) < 0) {
parentLoc.end = childLoc.end;
}
}
}
function fixFaultyLocations(node, lines) {
var loc = node.loc;
if (loc) {
if (loc.start.line < 1) {
loc.start.line = 1;
}
if (loc.end.line < 1) {
loc.end.line = 1;
}
}
if (node.type === "File") {
// Babylon returns File nodes whose .loc.{start,end} do not include
// leading or trailing whitespace.
loc.start = lines.firstPos();
loc.end = lines.lastPos();
}
fixForLoopHead(node, lines);
fixTemplateLiteral(node, lines);
if (loc && node.decorators) {
// Expand the .loc of the node responsible for printing the decorators
// (here, the decorated node) so that it includes node.decorators.
node.decorators.forEach(function (decorator) {
expandLoc(loc, decorator.loc);
});
}
else if (node.declaration && isExportDeclaration(node)) {
// Nullify .loc information for the child declaration so that we never
// try to reprint it without also reprinting the export declaration.
node.declaration.loc = null;
// Expand the .loc of the node responsible for printing the decorators
// (here, the export declaration) so that it includes node.decorators.
var decorators = node.declaration.decorators;
if (decorators) {
decorators.forEach(function (decorator) {
expandLoc(loc, decorator.loc);
});
}
}
else if ((n.MethodDefinition && n.MethodDefinition.check(node)) ||
(n.Property.check(node) && (node.method || node.shorthand))) {
// If the node is a MethodDefinition or a .method or .shorthand
// Property, then the location information stored in
// node.value.loc is very likely untrustworthy (just the {body}
// part of a method, or nothing in the case of shorthand
// properties), so we null out that information to prevent
// accidental reuse of bogus source code during reprinting.
node.value.loc = null;
if (n.FunctionExpression.check(node.value)) {
// FunctionExpression method values should be anonymous,
// because their .id fields are ignored anyway.
node.value.id = null;
}
}
else if (node.type === "ObjectTypeProperty") {
var loc_1 = node.loc;
var end = loc_1 && loc_1.end;
if (end) {
end = copyPos(end);
if (lines.prevPos(end) && lines.charAt(end) === ",") {
// Some parsers accidentally include trailing commas in the
// .loc.end information for ObjectTypeProperty nodes.
if ((end = lines.skipSpaces(end, true, true))) {
loc_1.end = end;
}
}
}
}
}
exports.fixFaultyLocations = fixFaultyLocations;
function fixForLoopHead(node, lines) {
if (node.type !== "ForStatement") {
return;
}
function fix(child) {
var loc = child && child.loc;
var start = loc && loc.start;
var end = loc && copyPos(loc.end);
while (start && end && comparePos(start, end) < 0) {
lines.prevPos(end);
if (lines.charAt(end) === ";") {
// Update child.loc.end to *exclude* the ';' character.
loc.end.line = end.line;
loc.end.column = end.column;
}
else {
break;
}
}
}
fix(node.init);
fix(node.test);
fix(node.update);
}
function fixTemplateLiteral(node, lines) {
if (node.type !== "TemplateLiteral") {
return;
}
if (node.quasis.length === 0) {
// If there are no quasi elements, then there is nothing to fix.
return;
}
// node.loc is not present when using export default with a template literal
if (node.loc) {
// First we need to exclude the opening ` from the .loc of the first
// quasi element, in case the parser accidentally decided to include it.
var afterLeftBackTickPos = copyPos(node.loc.start);
assert_1.default.strictEqual(lines.charAt(afterLeftBackTickPos), "`");
assert_1.default.ok(lines.nextPos(afterLeftBackTickPos));
var firstQuasi = node.quasis[0];
if (comparePos(firstQuasi.loc.start, afterLeftBackTickPos) < 0) {
firstQuasi.loc.start = afterLeftBackTickPos;
}
// Next we need to exclude the closing ` from the .loc of the last quasi
// element, in case the parser accidentally decided to include it.
var rightBackTickPos = copyPos(node.loc.end);
assert_1.default.ok(lines.prevPos(rightBackTickPos));
assert_1.default.strictEqual(lines.charAt(rightBackTickPos), "`");
var lastQuasi = node.quasis[node.quasis.length - 1];
if (comparePos(rightBackTickPos, lastQuasi.loc.end) < 0) {
lastQuasi.loc.end = rightBackTickPos;
}
}
// Now we need to exclude ${ and } characters from the .loc's of all
// quasi elements, since some parsers accidentally include them.
node.expressions.forEach(function (expr, i) {
// Rewind from expr.loc.start over any whitespace and the ${ that
// precedes the expression. The position of the $ should be the same
// as the .loc.end of the preceding quasi element, but some parsers
// accidentally include the ${ in the .loc of the quasi element.
var dollarCurlyPos = lines.skipSpaces(expr.loc.start, true, false);
if (lines.prevPos(dollarCurlyPos) &&
lines.charAt(dollarCurlyPos) === "{" &&
lines.prevPos(dollarCurlyPos) &&
lines.charAt(dollarCurlyPos) === "$") {
var quasiBefore = node.quasis[i];
if (comparePos(dollarCurlyPos, quasiBefore.loc.end) < 0) {
quasiBefore.loc.end = dollarCurlyPos;
}
}
// Likewise, some parsers accidentally include the } that follows
// the expression in the .loc of the following quasi element.
var rightCurlyPos = lines.skipSpaces(expr.loc.end, false, false);
if (lines.charAt(rightCurlyPos) === "}") {
assert_1.default.ok(lines.nextPos(rightCurlyPos));
// Now rightCurlyPos is technically the position just after the }.
var quasiAfter = node.quasis[i + 1];
if (comparePos(quasiAfter.loc.start, rightCurlyPos) < 0) {
quasiAfter.loc.start = rightCurlyPos;
}
}
});
}
function isExportDeclaration(node) {
if (node)
switch (node.type) {
case "ExportDeclaration":
case "ExportDefaultDeclaration":
case "ExportDefaultSpecifier":
case "DeclareExportDeclaration":
case "ExportNamedDeclaration":
case "ExportAllDeclaration":
return true;
}
return false;
}
exports.isExportDeclaration = isExportDeclaration;
function getParentExportDeclaration(path) {
var parentNode = path.getParentNode();
if (path.getName() === "declaration" && isExportDeclaration(parentNode)) {
return parentNode;
}
return null;
}
exports.getParentExportDeclaration = getParentExportDeclaration;
function isTrailingCommaEnabled(options, context) {
var trailingComma = options.trailingComma;
if (typeof trailingComma === "object") {
return !!trailingComma[context];
}
return !!trailingComma;
}
exports.isTrailingCommaEnabled = isTrailingCommaEnabled;
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