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Fixed bug in 'Regular expression' operation when highlighting lookaheads

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This commit is contained in:
n1474335 2019-01-08 17:51:43 +00:00
parent c82971f8db
commit 766de7e6fa
2 changed files with 76 additions and 83 deletions
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31
src/core/operations/RegularExpression.mjs
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@ -228,40 +228,29 @@ function regexList (input, regex, displayTotal, matches, captureGroups) {
function regexHighlight (input, regex, displayTotal) {
let output = "",
title = "",
m,
hl = 1,
i = 0,
total = 0;
while ((m = regex.exec(input))) {
// Moves pointer when an empty string is matched (prevents infinite loop)
if (m.index === regex.lastIndex) {
regex.lastIndex++;
}
output = input.replace(regex, (match, ...args) => {
args.pop(); // Throw away full string
const offset = args.pop(),
groups = args;
// Add up to match
output += Utils.escapeHtml(input.slice(i, m.index));
title = `Offset: ${m.index}\n`;
if (m.length > 1) {
title = `Offset: ${offset}\n`;
if (groups.length) {
title += "Groups:\n";
for (let n = 1; n < m.length; ++n) {
title += `\t${n}: ${m[n]}\n`;
for (let i = 0; i < groups.length; i++) {
title += `\t${i+1}: ${Utils.escapeHtml(groups[i])}\n`;
}
}
// Add match with highlighting
output += "<span class='hl"+hl+"' title='"+title+"'>" + Utils.escapeHtml(m[0]) + "</span>";
// Switch highlight
hl = hl === 1 ? 2 : 1;
i = regex.lastIndex;
total++;
}
// Add all after final match
output += Utils.escapeHtml(input.slice(i, input.length));
return `<span class='hl${hl}' title='${title}'>${Utils.escapeHtml(match)}</span>`;
});
if (displayTotal)
output = "Total found: " + total + "\n\n" + output;