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- 'use strict';
- Object.defineProperty(exports, '__esModule', {
- value: true
- });
- exports.dedentLines = void 0;
- /**
- * Copyright (c) Meta Platforms, Inc. and affiliates.
- *
- * This source code is licensed under the MIT license found in the
- * LICENSE file in the root directory of this source tree.
- */
- const getIndentationLength = line => {
- const result = /^( {2})+/.exec(line);
- return result === null ? 0 : result[0].length;
- };
- const dedentLine = line => line.slice(getIndentationLength(line));
- // Return true if:
- // "key": "value has multiple lines\n…
- // "key has multiple lines\n…
- const hasUnmatchedDoubleQuoteMarks = string => {
- let n = 0;
- let i = string.indexOf('"', 0);
- while (i !== -1) {
- if (i === 0 || string[i - 1] !== '\\') {
- n += 1;
- }
- i = string.indexOf('"', i + 1);
- }
- return n % 2 !== 0;
- };
- const isFirstLineOfTag = line => /^( {2})*</.test(line);
- // The length of the output array is the index of the next input line.
- // Push dedented lines of start tag onto output and return true;
- // otherwise return false because:
- // * props include a multiline string (or text node, if props have markup)
- // * start tag does not close
- const dedentStartTag = (input, output) => {
- let line = input[output.length];
- output.push(dedentLine(line));
- if (line.includes('>')) {
- return true;
- }
- while (output.length < input.length) {
- line = input[output.length];
- if (hasUnmatchedDoubleQuoteMarks(line)) {
- return false; // because props include a multiline string
- } else if (isFirstLineOfTag(line)) {
- // Recursion only if props have markup.
- if (!dedentMarkup(input, output)) {
- return false;
- }
- } else {
- output.push(dedentLine(line));
- if (line.includes('>')) {
- return true;
- }
- }
- }
- return false;
- };
- // Push dedented lines of markup onto output and return true;
- // otherwise return false because:
- // * props include a multiline string
- // * text has more than one adjacent line
- // * markup does not close
- const dedentMarkup = (input, output) => {
- let line = input[output.length];
- if (!dedentStartTag(input, output)) {
- return false;
- }
- if (input[output.length - 1].includes('/>')) {
- return true;
- }
- let isText = false;
- const stack = [];
- stack.push(getIndentationLength(line));
- while (stack.length > 0 && output.length < input.length) {
- line = input[output.length];
- if (isFirstLineOfTag(line)) {
- if (line.includes('</')) {
- output.push(dedentLine(line));
- stack.pop();
- } else {
- if (!dedentStartTag(input, output)) {
- return false;
- }
- if (!input[output.length - 1].includes('/>')) {
- stack.push(getIndentationLength(line));
- }
- }
- isText = false;
- } else {
- if (isText) {
- return false; // because text has more than one adjacent line
- }
- const indentationLengthOfTag = stack[stack.length - 1];
- output.push(line.slice(indentationLengthOfTag + 2));
- isText = true;
- }
- }
- return stack.length === 0;
- };
- // Return lines unindented by heuristic;
- // otherwise return null because:
- // * props include a multiline string
- // * text has more than one adjacent line
- // * markup does not close
- const dedentLines = input => {
- const output = [];
- while (output.length < input.length) {
- const line = input[output.length];
- if (hasUnmatchedDoubleQuoteMarks(line)) {
- return null;
- } else if (isFirstLineOfTag(line)) {
- if (!dedentMarkup(input, output)) {
- return null;
- }
- } else {
- output.push(dedentLine(line));
- }
- }
- return output;
- };
- exports.dedentLines = dedentLines;
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