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107 lines
2.4 KiB
JavaScript
107 lines
2.4 KiB
JavaScript
// inspired from https://github.com/markdown-it/markdown-it/blob/master/lib/rules_inline/html_inline.mjs
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// note that allow lister will run on top of it, so if a tag is allowed here but not on
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// the allow list, then it won't show up
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const inline_names = ["kbd", "mark"];
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const patterns = inline_names.join("|");
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const attr_name = "[a-zA-Z_:][a-zA-Z0-9:._-]*";
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const unquoted = "[^\"'=<>`\\x00-\\x20]+";
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const single_quoted = "'[^']*'";
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const double_quoted = '"[^"]*"';
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const attr_value =
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"(?:" + unquoted + "|" + single_quoted + "|" + double_quoted + ")";
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const attribute = "(?:\\s+" + attr_name + "(?:\\s*=\\s*" + attr_value + ")?)";
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const open_tag = `<(${patterns})` + attribute + "*\\s*\\/?>";
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const close_tag = `<\\/(${patterns})\\s*>`;
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const comment = "<!---?>|<!--(?:[^-]|-[^-]|--[^>])*-->";
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const processing = "<[?][\\s\\S]*?[?]>";
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const declaration = "<![A-Za-z][^>]*>";
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const cdata = "<!\\[CDATA\\[[\\s\\S]*?\\]\\]>";
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const HTML_TAG_RE = new RegExp(
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"^(?:" +
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open_tag +
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"|" +
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close_tag +
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"|" +
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comment +
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"|" +
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processing +
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"|" +
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declaration +
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"|" +
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cdata +
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")"
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);
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function isLinkOpen(str) {
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return /^<a[>\s]/i.test(str);
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}
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function isLinkClose(str) {
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return /^<\/a\s*>/i.test(str);
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}
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function isLetter(ch) {
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/*eslint no-bitwise:0*/
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let lc = ch | 0x20; // to lower case
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return lc >= 0x61 /* a */ && lc <= 0x7a /* z */;
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}
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function chatHtmlInlineRule(state, silent) {
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let ch,
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match,
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max,
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token,
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pos = state.pos;
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if (!state.md.options.html) {
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return false;
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}
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// Check start
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max = state.posMax;
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if (state.src.charCodeAt(pos) !== 0x3c /* < */ || pos + 2 >= max) {
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return false;
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}
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// Quick fail on second char
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ch = state.src.charCodeAt(pos + 1);
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if (
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ch !== 0x21 /* ! */ &&
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ch !== 0x3f /* ? */ &&
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ch !== 0x2f /* / */ &&
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!isLetter(ch)
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) {
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return false;
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}
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match = state.src.slice(pos).match(HTML_TAG_RE);
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if (!match) {
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return false;
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}
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if (!silent) {
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token = state.push("html_inline", "", 0);
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token.content = match[0];
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if (isLinkOpen(token.content)) {
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state.linkLevel++;
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}
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if (isLinkClose(token.content)) {
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state.linkLevel--;
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}
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}
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state.pos += match[0].length;
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return true;
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}
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export function setup(helper) {
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helper.registerPlugin((md) => {
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if (md.options.discourse.features["chat-html-inline"]) {
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md.inline.ruler.push("chat-html-inline", chatHtmlInlineRule);
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}
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});
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}
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