douban markdown
此脚本不应直接安装。它是供其他脚本使用的外部库，要使用该库请加入元指令 // @require https://update.greasyfork.org/scripts/21647/137863/markdown-it-footnote.js
// ==UserScript==
// @name markdown-it-footnote
// @namespace https://github.com//markdown-it/markdown-it-footnote
// @version 0.1
// @description douban markdown
// @author haidao
// @grant none
// ==/UserScript==
/*! markdown-it-footnote 3.0.0 https://github.com//markdown-it/markdown-it-footnote @license MIT */
(function(f){if(typeof exports==="object"&&typeof module!=="undefined"){module.exports=f()}else if(typeof define==="function"&&define.amd){define([],f)}else{var g;if(typeof window!=="undefined"){g=window}else if(typeof global!=="undefined"){g=global}else if(typeof self!=="undefined"){g=self}else{g=this}g.markdownitFootnote = f()}})(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
// Process footnotes
//
'use strict';
////////////////////////////////////////////////////////////////////////////////
// Renderer partials
function render_footnote_anchor_name(tokens, idx, options, env/*, slf*/) {
var n = Number(tokens[idx].meta.id + 1).toString();
if (tokens[idx].meta.subId > 0) {
n += ':' + tokens[idx].meta.subId;
}
var prefix = '';
if (typeof env.docId === 'string') {
prefix = '-' + env.docId + '-';
}
return prefix + n;
}
function render_footnote_caption(tokens, idx/*, options, env, slf*/) {
var n = Number(tokens[idx].meta.id + 1).toString();
if (tokens[idx].meta.subId > 0) {
n += ':' + tokens[idx].meta.subId;
}
return '[' + n + ']';
}
function render_footnote_ref(tokens, idx, options, env, slf) {
var id = slf.rules.footnote_anchor_name(tokens, idx, options, env, slf);
var caption = slf.rules.footnote_caption(tokens, idx, options, env, slf);
return '<sup class="footnote-ref"><a href="#fn' + id + '" id="fnref' + id + '">' + caption + '</a></sup>';
}
function render_footnote_block_open(tokens, idx, options) {
return (options.xhtmlOut ? '<hr class="footnotes-sep" />\n' : '<hr class="footnotes-sep">\n') +
'<section class="footnotes">\n' +
'<ol class="footnotes-list">\n';
}
function render_footnote_block_close() {
return '</ol>\n</section>\n';
}
function render_footnote_open(tokens, idx, options, env, slf) {
var id = slf.rules.footnote_anchor_name(tokens, idx, options, env, slf);
return '<li id="fn' + id + '" class="footnote-item">';
}
function render_footnote_close() {
return '</li>\n';
}
function render_footnote_anchor(tokens, idx, options, env, slf) {
var id = slf.rules.footnote_anchor_name(tokens, idx, options, env, slf);
/* ↩ with escape code to prevent display as Apple Emoji on iOS */
return ' <a href="#fnref' + id + '" class="footnote-backref">\u21a9\uFE0E</a>';
}
module.exports = function footnote_plugin(md) {
var parseLinkLabel = md.helpers.parseLinkLabel,
isSpace = md.utils.isSpace;
md.renderer.rules.footnote_ref = render_footnote_ref;
md.renderer.rules.footnote_block_open = render_footnote_block_open;
md.renderer.rules.footnote_block_close = render_footnote_block_close;
md.renderer.rules.footnote_open = render_footnote_open;
md.renderer.rules.footnote_close = render_footnote_close;
md.renderer.rules.footnote_anchor = render_footnote_anchor;
// helpers (only used in other rules, no tokens are attached to those)
md.renderer.rules.footnote_caption = render_footnote_caption;
md.renderer.rules.footnote_anchor_name = render_footnote_anchor_name;
// Process footnote block definition
function footnote_def(state, startLine, endLine, silent) {
var oldBMark, oldTShift, oldSCount, oldParentType, pos, label, token,
initial, offset, ch, posAfterColon,
start = state.bMarks[startLine] + state.tShift[startLine],
max = state.eMarks[startLine];
// line should be at least 5 chars - "[^x]:"
if (start + 4 > max) { return false; }
if (state.src.charCodeAt(start) !== 0x5B/* [ */) { return false; }
if (state.src.charCodeAt(start + 1) !== 0x5E/* ^ */) { return false; }
for (pos = start + 2; pos < max; pos++) {
if (state.src.charCodeAt(pos) === 0x20) { return false; }
if (state.src.charCodeAt(pos) === 0x5D /* ] */) {
break;
}
}
if (pos === start + 2) { return false; } // no empty footnote labels
if (pos + 1 >= max || state.src.charCodeAt(++pos) !== 0x3A /* : */) { return false; }
if (silent) { return true; }
pos++;
if (!state.env.footnotes) { state.env.footnotes = {}; }
if (!state.env.footnotes.refs) { state.env.footnotes.refs = {}; }
label = state.src.slice(start + 2, pos - 2);
state.env.footnotes.refs[':' + label] = -1;
token = new state.Token('footnote_reference_open', '', 1);
token.meta = { label: label };
token.level = state.level++;
state.tokens.push(token);
oldBMark = state.bMarks[startLine];
oldTShift = state.tShift[startLine];
oldSCount = state.sCount[startLine];
oldParentType = state.parentType;
posAfterColon = pos;
initial = offset = state.sCount[startLine] + pos - (state.bMarks[startLine] + state.tShift[startLine]);
while (pos < max) {
ch = state.src.charCodeAt(pos);
if (isSpace(ch)) {
if (ch === 0x09) {
offset += 4 - offset % 4;
} else {
offset++;
}
} else {
break;
}
pos++;
}
state.tShift[startLine] = pos - posAfterColon;
state.sCount[startLine] = offset - initial;
state.bMarks[startLine] = posAfterColon;
state.blkIndent += 4;
state.parentType = 'footnote';
if (state.sCount[startLine] < state.blkIndent) {
state.sCount[startLine] += state.blkIndent;
}
state.md.block.tokenize(state, startLine, endLine, true);
state.parentType = oldParentType;
state.blkIndent -= 4;
state.tShift[startLine] = oldTShift;
state.sCount[startLine] = oldSCount;
state.bMarks[startLine] = oldBMark;
token = new state.Token('footnote_reference_close', '', -1);
token.level = --state.level;
state.tokens.push(token);
return true;
}
// Process inline footnotes (^[...])
function footnote_inline(state, silent) {
var labelStart,
labelEnd,
footnoteId,
token,
tokens,
max = state.posMax,
start = state.pos;
if (start + 2 >= max) { return false; }
if (state.src.charCodeAt(start) !== 0x5E/* ^ */) { return false; }
if (state.src.charCodeAt(start + 1) !== 0x5B/* [ */) { return false; }
labelStart = start + 2;
labelEnd = parseLinkLabel(state, start + 1);
// parser failed to find ']', so it's not a valid note
if (labelEnd < 0) { return false; }
// 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) {
if (!state.env.footnotes) { state.env.footnotes = {}; }
if (!state.env.footnotes.list) { state.env.footnotes.list = []; }
footnoteId = state.env.footnotes.list.length;
state.md.inline.parse(
state.src.slice(labelStart, labelEnd),
state.md,
state.env,
tokens = []
);
token = state.push('footnote_ref', '', 0);
token.meta = { id: footnoteId };
state.env.footnotes.list[footnoteId] = { tokens: tokens };
}
state.pos = labelEnd + 1;
state.posMax = max;
return true;
}
// Process footnote references ([^...])
function footnote_ref(state, silent) {
var label,
pos,
footnoteId,
footnoteSubId,
token,
max = state.posMax,
start = state.pos;
// should be at least 4 chars - "[^x]"
if (start + 3 > max) { return false; }
if (!state.env.footnotes || !state.env.footnotes.refs) { return false; }
if (state.src.charCodeAt(start) !== 0x5B/* [ */) { return false; }
if (state.src.charCodeAt(start + 1) !== 0x5E/* ^ */) { return false; }
for (pos = start + 2; pos < max; pos++) {
if (state.src.charCodeAt(pos) === 0x20) { return false; }
if (state.src.charCodeAt(pos) === 0x0A) { return false; }
if (state.src.charCodeAt(pos) === 0x5D /* ] */) {
break;
}
}
if (pos === start + 2) { return false; } // no empty footnote labels
if (pos >= max) { return false; }
pos++;
label = state.src.slice(start + 2, pos - 1);
if (typeof state.env.footnotes.refs[':' + label] === 'undefined') { return false; }
if (!silent) {
if (!state.env.footnotes.list) { state.env.footnotes.list = []; }
if (state.env.footnotes.refs[':' + label] < 0) {
footnoteId = state.env.footnotes.list.length;
state.env.footnotes.list[footnoteId] = { label: label, count: 0 };
state.env.footnotes.refs[':' + label] = footnoteId;
} else {
footnoteId = state.env.footnotes.refs[':' + label];
}
footnoteSubId = state.env.footnotes.list[footnoteId].count;
state.env.footnotes.list[footnoteId].count++;
token = state.push('footnote_ref', '', 0);
token.meta = { id: footnoteId, subId: footnoteSubId, label: label };
}
state.pos = pos;
state.posMax = max;
return true;
}
// Glue footnote tokens to end of token stream
function footnote_tail(state) {
var i, l, j, t, lastParagraph, list, token, tokens, current, currentLabel,
insideRef = false,
refTokens = {};
if (!state.env.footnotes) { return; }
state.tokens = state.tokens.filter(function (tok) {
if (tok.type === 'footnote_reference_open') {
insideRef = true;
current = [];
currentLabel = tok.meta.label;
return false;
}
if (tok.type === 'footnote_reference_close') {
insideRef = false;
// prepend ':' to avoid conflict with Object.prototype members
refTokens[':' + currentLabel] = current;
return false;
}
if (insideRef) { current.push(tok); }
return !insideRef;
});
if (!state.env.footnotes.list) { return; }
list = state.env.footnotes.list;
token = new state.Token('footnote_block_open', '', 1);
state.tokens.push(token);
for (i = 0, l = list.length; i < l; i++) {
token = new state.Token('footnote_open', '', 1);
token.meta = { id: i, label: list[i].label };
state.tokens.push(token);
if (list[i].tokens) {
tokens = [];
token = new state.Token('paragraph_open', 'p', 1);
token.block = true;
tokens.push(token);
token = new state.Token('inline', '', 0);
token.children = list[i].tokens;
token.content = '';
tokens.push(token);
token = new state.Token('paragraph_close', 'p', -1);
token.block = true;
tokens.push(token);
} else if (list[i].label) {
tokens = refTokens[':' + list[i].label];
}
state.tokens = state.tokens.concat(tokens);
if (state.tokens[state.tokens.length - 1].type === 'paragraph_close') {
lastParagraph = state.tokens.pop();
} else {
lastParagraph = null;
}
t = list[i].count > 0 ? list[i].count : 1;
for (j = 0; j < t; j++) {
token = new state.Token('footnote_anchor', '', 0);
token.meta = { id: i, subId: j, label: list[i].label };
state.tokens.push(token);
}
if (lastParagraph) {
state.tokens.push(lastParagraph);
}
token = new state.Token('footnote_close', '', -1);
state.tokens.push(token);
}
token = new state.Token('footnote_block_close', '', -1);
state.tokens.push(token);
}
md.block.ruler.before('reference', 'footnote_def', footnote_def, { alt: [ 'paragraph', 'reference' ] });
md.inline.ruler.after('image', 'footnote_inline', footnote_inline);
md.inline.ruler.after('footnote_inline', 'footnote_ref', footnote_ref);
md.core.ruler.after('inline', 'footnote_tail', footnote_tail);
};
},{}]},{},[1])(1)
});