|
|
|
// Process [link](<to> "stuff")
|
|
|
|
|
|
|
|
'use strict';
|
|
|
|
|
|
|
|
var parseLinkLabel = require('../helpers/parse_link_label');
|
|
|
|
var parseLinkDestination = require('../helpers/parse_link_destination');
|
|
|
|
var parseLinkTitle = require('../helpers/parse_link_title');
|
|
|
|
var normalizeReference = require('../common/utils').normalizeReference;
|
|
|
|
var isSpace = require('../common/utils').isSpace;
|
|
|
|
|
|
|
|
|
|
|
|
module.exports = function link(state, silent) {
|
|
|
|
var attrs,
|
|
|
|
code,
|
|
|
|
label,
|
|
|
|
labelEnd,
|
|
|
|
labelStart,
|
|
|
|
pos,
|
|
|
|
res,
|
|
|
|
ref,
|
|
|
|
title,
|
|
|
|
token,
|
|
|
|
href = '',
|
|
|
|
oldPos = state.pos,
|
|
|
|
max = state.posMax,
|
|
|
|
start = state.pos;
|
|
|
|
|
|
|
|
if (state.src.charCodeAt(state.pos) !== 0x5B/* [ */) { return false; }
|
|
|
|
|
|
|
|
labelStart = state.pos + 1;
|
|
|
|
labelEnd = parseLinkLabel(state, state.pos, true);
|
|
|
|
|
|
|
|
// parser failed to find ']', so it's not a valid link
|
|
|
|
if (labelEnd < 0) { return false; }
|
|
|
|
|
|
|
|
pos = labelEnd + 1;
|
|
|
|
if (pos < max && state.src.charCodeAt(pos) === 0x28/* ( */) {
|
|
|
|
//
|
|
|
|
// Inline link
|
|
|
|
//
|
|
|
|
|
|
|
|
// [link]( <href> "title" )
|
|
|
|
// ^^ skipping these spaces
|
|
|
|
pos++;
|
|
|
|
for (; pos < max; pos++) {
|
|
|
|
code = state.src.charCodeAt(pos);
|
|
|
|
if (!isSpace(code) && code !== 0x0A) { break; }
|
|
|
|
}
|
|
|
|
if (pos >= max) { return false; }
|
|
|
|
|
|
|
|
// [link]( <href> "title" )
|
|
|
|
// ^^^^^^ parsing link destination
|
|
|
|
start = pos;
|
|
|
|
res = parseLinkDestination(state.src, pos, state.posMax);
|
|
|
|
if (res.ok) {
|
|
|
|
href = state.md.normalizeLink(res.str);
|
|
|
|
if (state.md.validateLink(href)) {
|
|
|
|
pos = res.pos;
|
|
|
|
} else {
|
|
|
|
href = '';
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// [link]( <href> "title" )
|
|
|
|
// ^^ skipping these spaces
|
|
|
|
start = pos;
|
|
|
|
for (; pos < max; pos++) {
|
|
|
|
code = state.src.charCodeAt(pos);
|
|
|
|
if (!isSpace(code) && code !== 0x0A) { break; }
|
|
|
|
}
|
|
|
|
|
|
|
|
// [link]( <href> "title" )
|
|
|
|
// ^^^^^^^ parsing link title
|
|
|
|
res = parseLinkTitle(state.src, pos, state.posMax);
|
|
|
|
if (pos < max && start !== pos && res.ok) {
|
|
|
|
title = res.str;
|
|
|
|
pos = res.pos;
|
|
|
|
|
|
|
|
// [link]( <href> "title" )
|
|
|
|
// ^^ skipping these spaces
|
|
|
|
for (; pos < max; pos++) {
|
|
|
|
code = state.src.charCodeAt(pos);
|
|
|
|
if (!isSpace(code) && code !== 0x0A) { break; }
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
title = '';
|
|
|
|
}
|
|
|
|
|
|
|
|
if (pos >= max || state.src.charCodeAt(pos) !== 0x29/* ) */) {
|
|
|
|
state.pos = oldPos;
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
pos++;
|
|
|
|
} else {
|
|
|
|
//
|
|
|
|
// Link reference
|
|
|
|
//
|
|
|
|
if (typeof state.env.references === 'undefined') { return false; }
|
|
|
|
|
|
|
|
if (pos < max && state.src.charCodeAt(pos) === 0x5B/* [ */) {
|
|
|
|
start = pos + 1;
|
|
|
|
pos = parseLinkLabel(state, pos);
|
|
|
|
if (pos >= 0) {
|
|
|
|
label = state.src.slice(start, pos++);
|
|
|
|
} else {
|
|
|
|
pos = labelEnd + 1;
|
|
|
|
}
|
|
|
|
} else {
|
|
|
|
pos = labelEnd + 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
// covers label === '' and label === undefined
|
|
|
|
// (collapsed reference link and shortcut reference link respectively)
|
|
|
|
if (!label) { label = state.src.slice(labelStart, labelEnd); }
|
|
|
|
|
|
|
|
ref = state.env.references[normalizeReference(label)];
|
|
|
|
if (!ref) {
|
|
|
|
state.pos = oldPos;
|
|
|
|
return false;
|
|
|
|
}
|
|
|
|
href = ref.href;
|
|
|
|
title = ref.title;
|
|
|
|
}
|
|
|
|
|
|
|
|
//
|
|
|
|
// We found the end of the link, and know for a fact it's a valid link;
|
|
|
|
// so all that's left to do is to call tokenizer.
|
|
|
|
//
|
|
|
|
if (!silent) {
|
|
|
|
state.pos = labelStart;
|
|
|
|
state.posMax = labelEnd;
|
|
|
|
|
|
|
|
token = state.push('link_open', 'a', 1);
|
|
|
|
token.attrs = attrs = [ [ 'href', href ] ];
|
|
|
|
if (title) {
|
|
|
|
attrs.push([ 'title', title ]);
|
|
|
|
}
|
|
|
|
|
|
|
|
state.md.inline.tokenize(state);
|
|
|
|
|
|
|
|
token = state.push('link_close', 'a', -1);
|
|
|
|
}
|
|
|
|
|
|
|
|
state.pos = pos;
|
|
|
|
state.posMax = max;
|
|
|
|
return true;
|
|
|
|
};
|