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'use strict';
Object.defineProperty(exports, '__esModule', {
value: true
});
exports.diffStringsUnified = exports.diffStringsRaw = void 0;
var _cleanupSemantic = require('./cleanupSemantic');
var _diffLines = require('./diffLines');
var _diffStrings = _interopRequireDefault(require('./diffStrings'));
var _getAlignedDiffs = _interopRequireDefault(require('./getAlignedDiffs'));
var _normalizeDiffOptions = require('./normalizeDiffOptions');
function _interopRequireDefault(obj) {
return obj && obj.__esModule ? obj : {default: obj};
}
/**
* 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 hasCommonDiff = (diffs, isMultiline) => {
if (isMultiline) {
// Important: Ignore common newline that was appended to multiline strings!
const iLast = diffs.length - 1;
return diffs.some(
(diff, i) =>
diff[0] === _cleanupSemantic.DIFF_EQUAL &&
(i !== iLast || diff[1] !== '\n')
);
}
return diffs.some(diff => diff[0] === _cleanupSemantic.DIFF_EQUAL);
};
// Compare two strings character-by-character.
// Format as comparison lines in which changed substrings have inverse colors.
const diffStringsUnified = (a, b, options) => {
if (a !== b && a.length !== 0 && b.length !== 0) {
const isMultiline = a.includes('\n') || b.includes('\n');
// getAlignedDiffs assumes that a newline was appended to the strings.
const diffs = diffStringsRaw(
isMultiline ? `${a}\n` : a,
isMultiline ? `${b}\n` : b,
true // cleanupSemantic
);
if (hasCommonDiff(diffs, isMultiline)) {
const optionsNormalized = (0, _normalizeDiffOptions.normalizeDiffOptions)(
options
);
const lines = (0, _getAlignedDiffs.default)(
diffs,
optionsNormalized.changeColor
);
return (0, _diffLines.printDiffLines)(lines, optionsNormalized);
}
}
// Fall back to line-by-line diff.
return (0, _diffLines.diffLinesUnified)(
a.split('\n'),
b.split('\n'),
options
);
};
// Compare two strings character-by-character.
// Optionally clean up small common substrings, also known as chaff.
exports.diffStringsUnified = diffStringsUnified;
const diffStringsRaw = (a, b, cleanup) => {
const diffs = (0, _diffStrings.default)(a, b);
if (cleanup) {
(0, _cleanupSemantic.cleanupSemantic)(diffs); // impure function
}
return diffs;
};
exports.diffStringsRaw = diffStringsRaw;