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