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71 lines
2.3 KiB
71 lines
2.3 KiB
"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.insertContentsAtOffset = insertContentsAtOffset;
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exports.replaceContentsWithOffset = replaceContentsWithOffset;
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exports.searchFromOffset = searchFromOffset;
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/**
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* Insert contents at given offset
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* @param srcContents source contents
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* @param insertion content to insert
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* @param offset `srcContents` offset to insert `insertion`
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* @returns updated contents
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*/
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function insertContentsAtOffset(srcContents, insertion, offset) {
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const srcContentsLength = srcContents.length;
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if (offset < 0 || offset > srcContentsLength) {
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throw new Error('Invalid parameters.');
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}
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if (offset === 0) {
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return `${insertion}${srcContents}`;
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} else if (offset === srcContentsLength) {
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return `${srcContents}${insertion}`;
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}
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const prefix = srcContents.substring(0, offset);
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const suffix = srcContents.substring(offset);
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return `${prefix}${insertion}${suffix}`;
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}
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/**
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* Replace contents at given start and end offset
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*
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* @param contents source contents
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* @param replacement new contents to place in [startOffset:endOffset]
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* @param startOffset `contents` start offset for replacement
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* @param endOffset `contents` end offset for replacement
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* @returns updated contents
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*/
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function replaceContentsWithOffset(contents, replacement, startOffset, endOffset) {
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const contentsLength = contents.length;
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if (startOffset < 0 || endOffset < 0 || startOffset >= contentsLength || endOffset >= contentsLength || startOffset > endOffset) {
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throw new Error('Invalid parameters.');
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}
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const prefix = contents.substring(0, startOffset);
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const suffix = contents.substring(endOffset + 1);
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return `${prefix}${replacement}${suffix}`;
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}
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/**
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* String.prototype.search() with offset support
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*
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* @param source source string to search
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* @param regexp RegExp pattern to search
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* @param offset start offset of `source` to search `regexp` pattern
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* @returns The index of the first match between the regular expression and the given string, or -1 if no match was found.
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*/
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function searchFromOffset(source, regexp, offset) {
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const target = source.substring(offset);
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const matchedIndex = target.search(regexp);
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return matchedIndex < 0 ? matchedIndex : matchedIndex + offset;
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}
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//# sourceMappingURL=commonCodeMod.js.map
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