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Move markdown-it token manipulation code into a separate file which is only require()-ed if/when needed.

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David Anson 2024-09-14 17:33:46 -07:00
parent a65e05bff2
commit 98ff66209d
6 changed files with 384 additions and 344 deletions
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61
helpers/helpers.js
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@ -255,67 +255,6 @@ module.exports.emphasisOrStrongStyleFor =
}
};
/**
* @callback InlineCodeSpanCallback
* @param {string} code Code content.
* @param {number} lineIndex Line index (0-based).
* @param {number} columnIndex Column index (0-based).
* @param {number} ticks Count of backticks.
* @returns {void}
*/
/**
* Calls the provided function for each inline code span's content.
*
* @param {string} input Markdown content.
* @param {InlineCodeSpanCallback} handler Callback function taking (code,
* lineIndex, columnIndex, ticks).
* @returns {void}
*/
function forEachInlineCodeSpan(input, handler) {
const backtickRe = /`+/g;
let match = null;
const backticksLengthAndIndex = [];
while ((match = backtickRe.exec(input)) !== null) {
backticksLengthAndIndex.push([ match[0].length, match.index ]);
}
const newLinesIndex = [];
while ((match = newLineRe.exec(input)) !== null) {
newLinesIndex.push(match.index);
}
let lineIndex = 0;
let lineStartIndex = 0;
let k = 0;
for (let i = 0; i < backticksLengthAndIndex.length - 1; i++) {
const [ startLength, startIndex ] = backticksLengthAndIndex[i];
if ((startIndex === 0) || (input[startIndex - 1] !== "\\")) {
for (let j = i + 1; j < backticksLengthAndIndex.length; j++) {
const [ endLength, endIndex ] = backticksLengthAndIndex[j];
if (startLength === endLength) {
for (; k < newLinesIndex.length; k++) {
const newLineIndex = newLinesIndex[k];
if (startIndex < newLineIndex) {
break;
}
lineIndex++;
lineStartIndex = newLineIndex + 1;
}
const columnIndex = startIndex - lineStartIndex + startLength;
handler(
input.slice(startIndex + startLength, endIndex),
lineIndex,
columnIndex,
startLength
);
i = j;
break;
}
}
}
}
}
module.exports.forEachInlineCodeSpan = forEachInlineCodeSpan;
/**
* Adds ellipsis to the left/right/middle of the specified text.
*