discourse/app/assets/javascripts/pretty-text/engines/discourse-markdown/helpers.js

73 lines
1.9 KiB
JavaScript

// since the markdown.it interface is a bit on the verbose side
// we can keep some general patterns here
export default null;
// creates a rule suitable for inline parsing and replacement
//
// example:
// const rule = inlineRegexRule(md, {
// start: '#',
// matcher: /^#([\w-:]{1,101})/i,
// emitter: emitter
// });
// based off https://github.com/markdown-it/markdown-it-emoji/blob/master/dist/markdown-it-emoji.js
//
export function textReplace(state, callback, skipAllLinks) {
let i,
j,
l,
tokens,
token,
blockTokens = state.tokens,
linkLevel = 0;
for (j = 0, l = blockTokens.length; j < l; j++) {
if (blockTokens[j].type !== "inline") {
continue;
}
tokens = blockTokens[j].children;
// We scan from the end, to keep position when new tags added.
// Use reversed logic in links start/end match
for (i = tokens.length - 1; i >= 0; i--) {
token = tokens[i];
if (skipAllLinks) {
if (token.type === "link_open" || token.type === "link_close") {
linkLevel -= token.nesting;
} else if (token.type === "html_inline") {
const openLink = token.content.substr(0, 2).toLowerCase();
if (openLink === "<a") {
if (token.content.match(/^<a(\s.*)?>/i)) {
linkLevel++;
}
} else if (token.content.substr(0, 4).toLowerCase() === "</a>") {
linkLevel--;
}
}
} else {
if (token.type === "link_open" || token.type === "link_close") {
if (token.info === "auto") {
linkLevel -= token.nesting;
}
}
}
if (token.type === "text" && linkLevel === 0) {
let split;
if ((split = callback(token.content, state))) {
// replace current node
blockTokens[j].children = tokens = state.md.utils.arrayReplaceAt(
tokens,
i,
split
);
}
}
}
}
}