90 lines
1.9 KiB
JavaScript
90 lines
1.9 KiB
JavaScript
"use strict";
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// V A R I A B L E S
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const regexForIds = /\(#.*\)/g;
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const regexForTextBeforeLink = /^.*(?=\()/g;
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const regexForUnescaping = /\\([ \\!"#$%&'()*+,./:;<=>?@[\]^_`{|}~-])/g;
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// P R O G R A M
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function superscript(state, silent) {
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const max = state.posMax;
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const start = state.pos;
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let found;
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let content;
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let token;
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if (state.src.charCodeAt(start) !== 0x5E/* ^ */) return false;
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if (silent) return false; // do not run pairs in validation mode
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if (start + 2 >= max) return false;
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state.pos = start + 1;
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while (state.pos < max) {
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if (state.src.charCodeAt(state.pos) === 0x5E/* ^ */) {
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found = true;
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break;
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}
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state.md.inline.skipToken(state);
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}
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if (!found || start + 1 === state.pos) {
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state.pos = start;
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return false;
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}
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content = state.src.slice(start + 1, state.pos);
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// do not allow unescaped spaces/newlines inside
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if (content.match(/(^|[^\\])(\\\\)*\s/)) {
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state.pos = start;
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return false;
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}
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const supText = content.replace(regexForUnescaping, "$1");
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// found!
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state.posMax = state.pos;
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state.pos = start + 1;
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// Earlier we checked !silent, but this implementation does not need it
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token = state.push("sup_open", "sup", 1);
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token.markup = "^";
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if (content.match(regexForIds)) {
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const theLink = supText.match(regexForIds)[0].replace("(#", "").replace(")", "");
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token.attrPush([ "id", theLink ]);
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}
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token = state.push("text", "", 0);
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if (content.match(regexForIds)) {
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const theText = supText.match(regexForTextBeforeLink)[0];
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token.content = theText;
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} else token.content = supText;
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token = state.push("sup_close", "sup", -1);
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token.markup = "^";
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state.pos = state.posMax + 1;
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state.posMax = max;
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return true;
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}
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// E X P O R T
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module.exports = exports = function sup_plugin(md) {
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md.inline.ruler.after("emphasis", "sup", superscript);
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};
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