aboutsummaryrefslogtreecommitdiff
path: root/ext/js/general/regex-util.js
diff options
context:
space:
mode:
authortoasted-nutbread <toasted-nutbread@users.noreply.github.com>2024-01-31 08:38:30 -0500
committerGitHub <noreply@github.com>2024-01-31 13:38:30 +0000
commit87ed7c8affd3ade9d3cd2d9ed1a61dd5f224e473 (patch)
treebe727294e31ef21e8a3f634734610e69e4a155ac /ext/js/general/regex-util.js
parent3e419aa562aab03ca20421aaf7e4d1a39194a5b4 (diff)
Module refactoring (#588)
* Convert PronunciationGenerator into static functions * Convert DictionaryDataUtil into static functions * Convert AnkiNoteDataCreator into static functions * Convert MediaUtil into static functions * Convert RegexUtil into static functions * Convert StringUtil into static functions * Convert ArrayBufferUtil into static functions * Convert AnkiUtil into static functions * Convert PermissionsUtil into static functions * Convert ProfileConditionsUtil into static functions
Diffstat (limited to 'ext/js/general/regex-util.js')
-rw-r--r--ext/js/general/regex-util.js130
1 files changed, 62 insertions, 68 deletions
diff --git a/ext/js/general/regex-util.js b/ext/js/general/regex-util.js
index 301b1fcf..f6eca3b6 100644
--- a/ext/js/general/regex-util.js
+++ b/ext/js/general/regex-util.js
@@ -16,82 +16,76 @@
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
+/** @type {RegExp} @readonly */
+const matchReplacementPattern = /\$(?:\$|&|`|'|(\d\d?)|<([^>]*)>)/g;
/**
- * This class provides some general utility functions for regular expressions.
+ * Applies string.replace using a regular expression and replacement string as arguments.
+ * A source map of the changes is also maintained.
+ * @param {string} text A string of the text to replace.
+ * @param {import('./text-source-map.js').TextSourceMap} sourceMap An instance of `TextSourceMap` which corresponds to `text`.
+ * @param {RegExp} pattern A regular expression to use as the replacement.
+ * @param {string} replacement A replacement string that follows the format of the standard
+ * JavaScript regular expression replacement string.
+ * @returns {string} A new string with the pattern replacements applied and the source map updated.
*/
-export class RegexUtil {
- /** @type {RegExp} @readonly */
- static _matchReplacementPattern = /\$(?:\$|&|`|'|(\d\d?)|<([^>]*)>)/g;
+export function applyTextReplacement(text, sourceMap, pattern, replacement) {
+ const isGlobal = pattern.global;
+ if (isGlobal) { pattern.lastIndex = 0; }
+ for (let loop = true; loop; loop = isGlobal) {
+ const match = pattern.exec(text);
+ if (match === null) { break; }
- /**
- * Applies string.replace using a regular expression and replacement string as arguments.
- * A source map of the changes is also maintained.
- * @param {string} text A string of the text to replace.
- * @param {import('./text-source-map.js').TextSourceMap} sourceMap An instance of `TextSourceMap` which corresponds to `text`.
- * @param {RegExp} pattern A regular expression to use as the replacement.
- * @param {string} replacement A replacement string that follows the format of the standard
- * JavaScript regular expression replacement string.
- * @returns {string} A new string with the pattern replacements applied and the source map updated.
- */
- static applyTextReplacement(text, sourceMap, pattern, replacement) {
- const isGlobal = pattern.global;
- if (isGlobal) { pattern.lastIndex = 0; }
- for (let loop = true; loop; loop = isGlobal) {
- const match = pattern.exec(text);
- if (match === null) { break; }
+ const matchText = match[0];
+ const index = match.index;
+ const actualReplacement = applyMatchReplacement(replacement, match);
+ const actualReplacementLength = actualReplacement.length;
+ const delta = actualReplacementLength - (matchText.length > 0 ? matchText.length : -1);
- const matchText = match[0];
- const index = match.index;
- const actualReplacement = this.applyMatchReplacement(replacement, match);
- const actualReplacementLength = actualReplacement.length;
- const delta = actualReplacementLength - (matchText.length > 0 ? matchText.length : -1);
+ text = `${text.substring(0, index)}${actualReplacement}${text.substring(index + matchText.length)}`;
+ pattern.lastIndex += delta;
- text = `${text.substring(0, index)}${actualReplacement}${text.substring(index + matchText.length)}`;
- pattern.lastIndex += delta;
-
- if (actualReplacementLength > 0) {
- sourceMap.insert(index, ...(new Array(actualReplacementLength).fill(0)));
- sourceMap.combine(index - 1 + actualReplacementLength, matchText.length);
- } else {
- sourceMap.combine(index, matchText.length);
- }
+ if (actualReplacementLength > 0) {
+ sourceMap.insert(index, ...(new Array(actualReplacementLength).fill(0)));
+ sourceMap.combine(index - 1 + actualReplacementLength, matchText.length);
+ } else {
+ sourceMap.combine(index, matchText.length);
}
- return text;
}
+ return text;
+}
- /**
- * Applies the replacement string for a given regular expression match.
- * @param {string} replacement The replacement string that follows the format of the standard
- * JavaScript regular expression replacement string.
- * @param {RegExpMatchArray} match A match object returned from RegExp.match.
- * @returns {string} A new string with the pattern replacement applied.
- */
- static applyMatchReplacement(replacement, match) {
- const pattern = this._matchReplacementPattern;
- pattern.lastIndex = 0;
- return replacement.replace(pattern, (g0, g1, g2) => {
- if (typeof g1 !== 'undefined') {
- const matchIndex = Number.parseInt(g1, 10);
- if (matchIndex >= 1 && matchIndex <= match.length) {
- return match[matchIndex];
- }
- } else if (typeof g2 !== 'undefined') {
- const {groups} = match;
- if (typeof groups === 'object' && groups !== null && Object.prototype.hasOwnProperty.call(groups, g2)) {
- return groups[g2];
- }
- } else {
- let {index} = match;
- if (typeof index !== 'number') { index = 0; }
- switch (g0) {
- case '$': return '$';
- case '&': return match[0];
- case '`': return replacement.substring(0, index);
- case '\'': return replacement.substring(index + g0.length);
- }
+/**
+ * Applies the replacement string for a given regular expression match.
+ * @param {string} replacement The replacement string that follows the format of the standard
+ * JavaScript regular expression replacement string.
+ * @param {RegExpMatchArray} match A match object returned from RegExp.match.
+ * @returns {string} A new string with the pattern replacement applied.
+ */
+export function applyMatchReplacement(replacement, match) {
+ const pattern = matchReplacementPattern;
+ pattern.lastIndex = 0;
+ return replacement.replace(pattern, (g0, g1, g2) => {
+ if (typeof g1 !== 'undefined') {
+ const matchIndex = Number.parseInt(g1, 10);
+ if (matchIndex >= 1 && matchIndex <= match.length) {
+ return match[matchIndex];
}
- return g0;
- });
- }
+ } else if (typeof g2 !== 'undefined') {
+ const {groups} = match;
+ if (typeof groups === 'object' && groups !== null && Object.prototype.hasOwnProperty.call(groups, g2)) {
+ return groups[g2];
+ }
+ } else {
+ let {index} = match;
+ if (typeof index !== 'number') { index = 0; }
+ switch (g0) {
+ case '$': return '$';
+ case '&': return match[0];
+ case '`': return replacement.substring(0, index);
+ case '\'': return replacement.substring(index + g0.length);
+ }
+ }
+ return g0;
+ });
}