Markdown parser, done right. 100% CommonMark support, extensions, syntax plugins & high speed
https://markdown-it.github.io/
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
98 lines
2.8 KiB
98 lines
2.8 KiB
'use strict';
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var StateInline = require('../rules_inline/state_inline');
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var parseLinkLabel = require('../helpers/parse_link_label');
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var parseLinkDestination = require('../helpers/parse_link_destination');
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var parseLinkTitle = require('../helpers/parse_link_title');
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var normalizeReference = require('../helpers/normalize_reference');
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function parseReference(str, parser, options, env) {
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var state, labelEnd, pos, max, code, start, href, title, label;
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if (str.charCodeAt(0) !== 0x5B/* [ */) { return -1; }
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if (str.indexOf(']:') === -1) { return -1; }
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state = new StateInline(str, parser, options, env, []);
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labelEnd = parseLinkLabel(state, 0);
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if (labelEnd < 0 || str.charCodeAt(labelEnd + 1) !== 0x3A/* : */) { return -1; }
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max = state.posMax;
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// [label]: destination 'title'
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// ^^^ skip optional whitespace here
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for (pos = labelEnd + 2; pos < max; pos++) {
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code = state.src.charCodeAt(pos);
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if (code !== 0x20 && code !== 0x0A) { break; }
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}
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// [label]: destination 'title'
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// ^^^^^^^^^^^ parse this
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if (!parseLinkDestination(state, pos)) { return -1; }
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href = state.linkContent;
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pos = state.pos;
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// [label]: destination 'title'
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// ^^^ skipping those spaces
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start = pos;
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for (pos = pos + 1; pos < max; pos++) {
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code = state.src.charCodeAt(pos);
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if (code !== 0x20 && code !== 0x0A) { break; }
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}
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// [label]: destination 'title'
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// ^^^^^^^ parse this
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if (pos < max && start !== pos && parseLinkTitle(state, pos)) {
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title = state.linkContent;
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pos = state.pos;
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} else {
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title = '';
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pos = start;
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}
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// ensure that the end of the line is empty
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while (pos < max && state.src.charCodeAt(pos) === 0x20/* space */) { pos++; }
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if (pos < max && state.src.charCodeAt(pos) !== 0x0A) { return -1; }
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label = normalizeReference(str.slice(1, labelEnd));
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if (typeof env.references[label] === 'undefined') {
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env.references[label] = { title: title, href: href };
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}
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return pos;
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}
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module.exports = function references(state) {
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var tokens = state.tokens, i, l, content, pos;
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state.env.references = state.env.references || {};
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if (state.inlineMode) {
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return;
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}
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// Scan definitions in paragraph inlines
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for (i = 1, l = tokens.length - 1; i < l; i++) {
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if (tokens[i].type === 'inline' &&
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tokens[i - 1].type === 'paragraph_open' &&
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tokens[i + 1].type === 'paragraph_close') {
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content = tokens[i].content;
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while (content.length) {
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pos = parseReference(content, state.inline, state.options, state.env);
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if (pos < 0) { break; }
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content = content.slice(pos).trim();
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}
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tokens[i].content = content;
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if (!content.length) {
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tokens[i - 1].tight = true;
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tokens[i + 1].tight = true;
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}
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}
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}
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};
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