1717 lines
61 KiB
JavaScript
1717 lines
61 KiB
JavaScript
// Released under MIT license
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// Copyright (c) 2009-2010 Dominic Baggott
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// Copyright (c) 2009-2010 Ash Berlin
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// Copyright (c) 2011 Christoph Dorn <christoph@christophdorn.com> (http://www.christophdorn.com)
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/*jshint browser:true, devel:true */
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(function (expose) {
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/**
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* class Markdown
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*
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* Markdown processing in Javascript done right. We have very particular views
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* on what constitutes 'right' which include:
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*
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* - produces well-formed HTML (this means that em and strong nesting is
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* important)
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*
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* - has an intermediate representation to allow processing of parsed data (We
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* in fact have two, both as [JsonML]: a markdown tree and an HTML tree).
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*
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* - is easily extensible to add new dialects without having to rewrite the
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* entire parsing mechanics
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*
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* - has a good test suite
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*
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* This implementation fulfills all of these (except that the test suite could
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* do with expanding to automatically run all the fixtures from other Markdown
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* implementations.)
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*
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* ##### Intermediate Representation
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*
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* *TODO* Talk about this :) Its JsonML, but document the node names we use.
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*
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* [JsonML]: http://jsonml.org/ "JSON Markup Language"
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**/
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var Markdown = expose.Markdown = function (dialect) {
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switch (typeof dialect) {
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case "undefined":
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this.dialect = Markdown.dialects.Gruber;
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break;
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case "object":
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this.dialect = dialect;
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break;
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default:
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if (dialect in Markdown.dialects) {
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this.dialect = Markdown.dialects[dialect];
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} else {
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throw new Error("Unknown Markdown dialect '" + String(dialect) + "'");
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}
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break;
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}
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this.em_state = [];
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this.strong_state = [];
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this.debug_indent = "";
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};
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/**
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* parse( markdown, [dialect] ) -> JsonML
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* - markdown (String): markdown string to parse
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* - dialect (String | Dialect): the dialect to use, defaults to gruber
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*
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* Parse `markdown` and return a markdown document as a Markdown.JsonML tree.
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**/
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expose.parse = function (source, dialect) {
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// dialect will default if undefined
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var md = new Markdown(dialect);
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return md.toTree(source);
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};
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/**
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* toHTML( markdown, [dialect] ) -> String
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* toHTML( md_tree ) -> String
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* - markdown (String): markdown string to parse
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* - md_tree (Markdown.JsonML): parsed markdown tree
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*
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* Take markdown (either as a string or as a JsonML tree) and run it through
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* [[toHTMLTree]] then turn it into a well-formated HTML fragment.
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**/
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expose.toHTML = function toHTML(source, dialect, options) {
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var input = expose.toHTMLTree(source, dialect, options);
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return expose.renderJsonML(input);
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};
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/**
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* toHTMLTree( markdown, [dialect] ) -> JsonML
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* toHTMLTree( md_tree ) -> JsonML
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* - markdown (String): markdown string to parse
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* - dialect (String | Dialect): the dialect to use, defaults to gruber
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* - md_tree (Markdown.JsonML): parsed markdown tree
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*
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* Turn markdown into HTML, represented as a JsonML tree. If a string is given
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* to this function, it is first parsed into a markdown tree by calling
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* [[parse]].
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**/
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expose.toHTMLTree = function toHTMLTree(input, dialect, options) {
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// convert string input to an MD tree
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if (typeof input === "string") input = this.parse(input, dialect);
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// Now convert the MD tree to an HTML tree
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// remove references from the tree
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var attrs = extract_attr(input),
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refs = {};
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if (attrs && attrs.references) {
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refs = attrs.references;
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}
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var html = convert_tree_to_html(input, refs, options);
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merge_text_nodes(html);
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return html;
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};
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// For Spidermonkey based engines
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function mk_block_toSource() {
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return "Markdown.mk_block( " +
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uneval(this.toString()) +
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", " +
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uneval(this.trailing) +
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", " +
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uneval(this.lineNumber) +
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" )";
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}
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// node
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function mk_block_inspect() {
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var util = require("util");
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return "Markdown.mk_block( " +
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util.inspect(this.toString()) +
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", " +
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util.inspect(this.trailing) +
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", " +
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util.inspect(this.lineNumber) +
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" )";
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}
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var mk_block = Markdown.mk_block = function (block, trail, line) {
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// Be helpful for default case in tests.
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if (arguments.length == 1) trail = "\n\n";
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var s = new String(block);
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s.trailing = trail;
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// To make it clear its not just a string
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s.inspect = mk_block_inspect;
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s.toSource = mk_block_toSource;
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if (line != undefined)
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s.lineNumber = line;
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return s;
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};
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function count_lines(str) {
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var n = 0, i = -1;
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while ((i = str.indexOf("\n", i + 1)) !== -1) n++;
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return n;
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}
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// Internal - split source into rough blocks
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Markdown.prototype.split_blocks = function splitBlocks(input, startLine) {
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input = input.replace(/(\r\n|\n|\r)/g, "\n");
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// [\s\S] matches _anything_ (newline or space)
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// [^] is equivalent but doesn't work in IEs.
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var re = /([\s\S]+?)($|\n#|\n(?:\s*\n|$)+)/g,
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blocks = [],
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m;
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var line_no = 1;
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if ((m = /^(\s*\n)/.exec(input)) != null) {
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// skip (but count) leading blank lines
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line_no += count_lines(m[0]);
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re.lastIndex = m[0].length;
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}
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while ((m = re.exec(input)) !== null) {
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if (m[2] == "\n#") {
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m[2] = "\n";
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re.lastIndex--;
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}
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blocks.push(mk_block(m[1], m[2], line_no));
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line_no += count_lines(m[0]);
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}
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return blocks;
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};
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/**
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* Markdown#processBlock( block, next ) -> undefined | [ JsonML, ... ]
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* - block (String): the block to process
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* - next (Array): the following blocks
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*
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* Process `block` and return an array of JsonML nodes representing `block`.
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*
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* It does this by asking each block level function in the dialect to process
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* the block until one can. Succesful handling is indicated by returning an
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* array (with zero or more JsonML nodes), failure by a false value.
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*
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* Blocks handlers are responsible for calling [[Markdown#processInline]]
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* themselves as appropriate.
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*
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* If the blocks were split incorrectly or adjacent blocks need collapsing you
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* can adjust `next` in place using shift/splice etc.
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*
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* If any of this default behaviour is not right for the dialect, you can
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* define a `__call__` method on the dialect that will get invoked to handle
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* the block processing.
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*/
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Markdown.prototype.processBlock = function processBlock(block, next) {
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var cbs = this.dialect.block,
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ord = cbs.__order__;
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if ("__call__" in cbs) {
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return cbs.__call__.call(this, block, next);
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}
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for (var i = 0; i < ord.length; i++) {
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//D:this.debug( "Testing", ord[i] );
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var res = cbs[ord[i]].call(this, block, next);
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if (res) {
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//D:this.debug(" matched");
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if (!isArray(res) || (res.length > 0 && !(isArray(res[0]))))
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this.debug(ord[i], "didn't return a proper array");
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//D:this.debug( "" );
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return res;
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}
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}
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// Uhoh! no match! Should we throw an error?
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return [];
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};
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Markdown.prototype.processInline = function processInline(block) {
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return this.dialect.inline.__call__.call(this, String(block));
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};
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/**
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* Markdown#toTree( source ) -> JsonML
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* - source (String): markdown source to parse
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*
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* Parse `source` into a JsonML tree representing the markdown document.
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**/
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// custom_tree means set this.tree to `custom_tree` and restore old value on return
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Markdown.prototype.toTree = function toTree(source, custom_root) {
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var blocks = source instanceof Array ? source : this.split_blocks(source);
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// Make tree a member variable so its easier to mess with in extensions
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var old_tree = this.tree;
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try {
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this.tree = custom_root || this.tree || ["markdown"];
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blocks:
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while (blocks.length) {
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var b = this.processBlock(blocks.shift(), blocks);
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// Reference blocks and the like won't return any content
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if (!b.length) continue blocks;
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this.tree.push.apply(this.tree, b);
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}
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return this.tree;
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} finally {
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if (custom_root) {
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this.tree = old_tree;
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}
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}
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};
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// Noop by default
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Markdown.prototype.debug = function () {
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var args = Array.prototype.slice.call(arguments);
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args.unshift(this.debug_indent);
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if (typeof print !== "undefined")
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print.apply(print, args);
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if (typeof console !== "undefined" && typeof console.log !== "undefined")
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console.log.apply(null, args);
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}
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Markdown.prototype.loop_re_over_block = function (re, block, cb) {
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// Dont use /g regexps with this
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var m,
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b = block.valueOf();
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while (b.length && (m = re.exec(b)) != null) {
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b = b.substr(m[0].length);
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cb.call(this, m);
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}
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return b;
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};
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/**
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* Markdown.dialects
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*
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* Namespace of built-in dialects.
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**/
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Markdown.dialects = {};
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/**
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* Markdown.dialects.Gruber
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*
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* The default dialect that follows the rules set out by John Gruber's
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* markdown.pl as closely as possible. Well actually we follow the behaviour of
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* that script which in some places is not exactly what the syntax web page
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* says.
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**/
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Markdown.dialects.Gruber = {
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block: {
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atxHeader: function atxHeader(block, next) {
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var m = block.match(/^(#{1,6})\s*(.*?)\s*#*\s*(?:\n|$)/);
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if (!m) return undefined;
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var header = ["header", {level: m[1].length}];
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Array.prototype.push.apply(header, this.processInline(m[2]));
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if (m[0].length < block.length)
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next.unshift(mk_block(block.substr(m[0].length), block.trailing, block.lineNumber + 2));
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return [header];
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},
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setextHeader: function setextHeader(block, next) {
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var m = block.match(/^(.*)\n([-=])\2\2+(?:\n|$)/);
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if (!m) return undefined;
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var level = (m[2] === "=") ? 1 : 2;
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var header = ["header", {level: level}, m[1]];
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if (m[0].length < block.length)
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next.unshift(mk_block(block.substr(m[0].length), block.trailing, block.lineNumber + 2));
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return [header];
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},
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code: function code(block, next) {
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// | Foo
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// |bar
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// should be a code block followed by a paragraph. Fun
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//
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// There might also be adjacent code block to merge.
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var ret = [],
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re = /^(?: {0,3}\t| {4})(.*)\n?/,
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lines;
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// 4 spaces + content
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if (!block.match(re)) return undefined;
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block_search:
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do {
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// Now pull out the rest of the lines
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var b = this.loop_re_over_block(
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re, block.valueOf(), function (m) {
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ret.push(m[1]);
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});
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if (b.length) {
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// Case alluded to in first comment. push it back on as a new block
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next.unshift(mk_block(b, block.trailing));
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break block_search;
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} else if (next.length) {
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// Check the next block - it might be code too
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if (!next[0].match(re)) break block_search;
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// Pull how how many blanks lines follow - minus two to account for .join
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ret.push(block.trailing.replace(/[^\n]/g, "").substring(2));
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block = next.shift();
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} else {
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break block_search;
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}
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} while (true);
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return [["code_block", ret.join("\n")]];
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},
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horizRule: function horizRule(block, next) {
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// this needs to find any hr in the block to handle abutting blocks
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var m = block.match(/^(?:([\s\S]*?)\n)?[ \t]*([-_*])(?:[ \t]*\2){2,}[ \t]*(?:\n([\s\S]*))?$/);
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if (!m) {
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return undefined;
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}
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var jsonml = [["hr"]];
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// if there's a leading abutting block, process it
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if (m[1]) {
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jsonml.unshift.apply(jsonml, this.processBlock(m[1], []));
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}
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// if there's a trailing abutting block, stick it into next
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if (m[3]) {
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next.unshift(mk_block(m[3]));
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}
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return jsonml;
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},
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// There are two types of lists. Tight and loose. Tight lists have no whitespace
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// between the items (and result in text just in the <li>) and loose lists,
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// which have an empty line between list items, resulting in (one or more)
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// paragraphs inside the <li>.
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//
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// There are all sorts weird edge cases about the original markdown.pl's
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// handling of lists:
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//
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// * Nested lists are supposed to be indented by four chars per level. But
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// if they aren't, you can get a nested list by indenting by less than
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// four so long as the indent doesn't match an indent of an existing list
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// item in the 'nest stack'.
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//
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// * The type of the list (bullet or number) is controlled just by the
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// first item at the indent. Subsequent changes are ignored unless they
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// are for nested lists
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//
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lists: (function () {
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// Use a closure to hide a few variables.
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var any_list = "[*+-]|\\d+\\.",
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bullet_list = /[*+-]/,
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number_list = /\d+\./,
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// Capture leading indent as it matters for determining nested lists.
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is_list_re = new RegExp("^( {0,3})(" + any_list + ")[ \t]+"),
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indent_re = "(?: {0,3}\\t| {4})";
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// TODO: Cache this regexp for certain depths.
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// Create a regexp suitable for matching an li for a given stack depth
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function regex_for_depth(depth) {
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return new RegExp(
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// m[1] = indent, m[2] = list_type
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"(?:^(" + indent_re + "{0," + depth + "} {0,3})(" + any_list + ")\\s+)|" +
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// m[3] = cont
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"(^" + indent_re + "{0," + (depth - 1) + "}[ ]{0,4})"
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);
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}
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function expand_tab(input) {
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return input.replace(/ {0,3}\t/g, " ");
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}
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// Add inline content `inline` to `li`. inline comes from processInline
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// so is an array of content
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function add(li, loose, inline, nl) {
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if (loose) {
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li.push(["para"].concat(inline));
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return;
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}
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// Hmmm, should this be any block level element or just paras?
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var add_to = li[li.length - 1] instanceof Array && li[li.length - 1][0] == "para"
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? li[li.length - 1]
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: li;
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// If there is already some content in this list, add the new line in
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if (nl && li.length > 1) inline.unshift(nl);
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for (var i = 0; i < inline.length; i++) {
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var what = inline[i],
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is_str = typeof what == "string";
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if (is_str && add_to.length > 1 && typeof add_to[add_to.length - 1] == "string") {
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add_to[add_to.length - 1] += what;
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} else {
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add_to.push(what);
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}
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}
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}
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// contained means have an indent greater than the current one. On
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// *every* line in the block
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function get_contained_blocks(depth, blocks) {
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var re = new RegExp("^(" + indent_re + "{" + depth + "}.*?\\n?)*$"),
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replace = new RegExp("^" + indent_re + "{" + depth + "}", "gm"),
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ret = [];
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while (blocks.length > 0) {
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if (re.exec(blocks[0])) {
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var b = blocks.shift(),
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// Now remove that indent
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x = b.replace(replace, "");
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ret.push(mk_block(x, b.trailing, b.lineNumber));
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} else {
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break;
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}
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}
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return ret;
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}
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// passed to stack.forEach to turn list items up the stack into paras
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function paragraphify(s, i, stack) {
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var list = s.list;
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var last_li = list[list.length - 1];
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if (last_li[1] instanceof Array && last_li[1][0] == "para") {
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return;
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}
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if (i + 1 == stack.length) {
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// Last stack frame
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// Keep the same array, but replace the contents
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last_li.push(["para"].concat(last_li.splice(1, last_li.length - 1)));
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} else {
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var sublist = last_li.pop();
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last_li.push(["para"].concat(last_li.splice(1, last_li.length - 1)), sublist);
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}
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}
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// The matcher function
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return function (block, next) {
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var m = block.match(is_list_re);
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if (!m) return undefined;
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function make_list(m) {
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var list = bullet_list.exec(m[2])
|
|
? ["bulletlist"]
|
|
: ["numberlist"];
|
|
|
|
stack.push({list: list, indent: m[1]});
|
|
return list;
|
|
}
|
|
|
|
|
|
var stack = [], // Stack of lists for nesting.
|
|
list = make_list(m),
|
|
last_li,
|
|
loose = false,
|
|
ret = [stack[0].list],
|
|
i;
|
|
|
|
// Loop to search over block looking for inner block elements and loose lists
|
|
loose_search:
|
|
while (true) {
|
|
// Split into lines preserving new lines at end of line
|
|
var lines = block.split(/(?=\n)/);
|
|
|
|
// We have to grab all lines for a li and call processInline on them
|
|
// once as there are some inline things that can span lines.
|
|
var li_accumulate = "";
|
|
|
|
// Loop over the lines in this block looking for tight lists.
|
|
tight_search:
|
|
for (var line_no = 0; line_no < lines.length; line_no++) {
|
|
var nl = "",
|
|
l = lines[line_no].replace(/^\n/, function (n) {
|
|
nl = n;
|
|
return "";
|
|
});
|
|
|
|
// TODO: really should cache this
|
|
var line_re = regex_for_depth(stack.length);
|
|
|
|
m = l.match(line_re);
|
|
//print( "line:", uneval(l), "\nline match:", uneval(m) );
|
|
|
|
// We have a list item
|
|
if (m[1] !== undefined) {
|
|
// Process the previous list item, if any
|
|
if (li_accumulate.length) {
|
|
add(last_li, loose, this.processInline(li_accumulate), nl);
|
|
// Loose mode will have been dealt with. Reset it
|
|
loose = false;
|
|
li_accumulate = "";
|
|
}
|
|
|
|
m[1] = expand_tab(m[1]);
|
|
var wanted_depth = Math.floor(m[1].length / 4) + 1;
|
|
//print( "want:", wanted_depth, "stack:", stack.length);
|
|
if (wanted_depth > stack.length) {
|
|
// Deep enough for a nested list outright
|
|
//print ( "new nested list" );
|
|
list = make_list(m);
|
|
last_li.push(list);
|
|
last_li = list[1] = ["listitem"];
|
|
} else {
|
|
// We aren't deep enough to be strictly a new level. This is
|
|
// where Md.pl goes nuts. If the indent matches a level in the
|
|
// stack, put it there, else put it one deeper then the
|
|
// wanted_depth deserves.
|
|
var found = false;
|
|
for (i = 0; i < stack.length; i++) {
|
|
if (stack[i].indent != m[1]) continue;
|
|
list = stack[i].list;
|
|
stack.splice(i + 1, stack.length - (i + 1));
|
|
found = true;
|
|
break;
|
|
}
|
|
|
|
if (!found) {
|
|
//print("not found. l:", uneval(l));
|
|
wanted_depth++;
|
|
if (wanted_depth <= stack.length) {
|
|
stack.splice(wanted_depth, stack.length - wanted_depth);
|
|
//print("Desired depth now", wanted_depth, "stack:", stack.length);
|
|
list = stack[wanted_depth - 1].list;
|
|
//print("list:", uneval(list) );
|
|
} else {
|
|
//print ("made new stack for messy indent");
|
|
list = make_list(m);
|
|
last_li.push(list);
|
|
}
|
|
}
|
|
|
|
//print( uneval(list), "last", list === stack[stack.length-1].list );
|
|
last_li = ["listitem"];
|
|
list.push(last_li);
|
|
} // end depth of shenegains
|
|
nl = "";
|
|
}
|
|
|
|
// Add content
|
|
if (l.length > m[0].length) {
|
|
li_accumulate += nl + l.substr(m[0].length);
|
|
}
|
|
} // tight_search
|
|
|
|
if (li_accumulate.length) {
|
|
add(last_li, loose, this.processInline(li_accumulate), nl);
|
|
// Loose mode will have been dealt with. Reset it
|
|
loose = false;
|
|
li_accumulate = "";
|
|
}
|
|
|
|
// Look at the next block - we might have a loose list. Or an extra
|
|
// paragraph for the current li
|
|
var contained = get_contained_blocks(stack.length, next);
|
|
|
|
// Deal with code blocks or properly nested lists
|
|
if (contained.length > 0) {
|
|
// Make sure all listitems up the stack are paragraphs
|
|
forEach(stack, paragraphify, this);
|
|
|
|
last_li.push.apply(last_li, this.toTree(contained, []));
|
|
}
|
|
|
|
var next_block = next[0] && next[0].valueOf() || "";
|
|
|
|
if (next_block.match(is_list_re) || next_block.match(/^ /)) {
|
|
block = next.shift();
|
|
|
|
// Check for an HR following a list: features/lists/hr_abutting
|
|
var hr = this.dialect.block.horizRule(block, next);
|
|
|
|
if (hr) {
|
|
ret.push.apply(ret, hr);
|
|
break;
|
|
}
|
|
|
|
// Make sure all listitems up the stack are paragraphs
|
|
forEach(stack, paragraphify, this);
|
|
|
|
loose = true;
|
|
continue loose_search;
|
|
}
|
|
break;
|
|
} // loose_search
|
|
|
|
return ret;
|
|
};
|
|
})(),
|
|
|
|
blockquote: function blockquote(block, next) {
|
|
if (!block.match(/^>/m))
|
|
return undefined;
|
|
|
|
var jsonml = [];
|
|
|
|
// separate out the leading abutting block, if any. I.e. in this case:
|
|
//
|
|
// a
|
|
// > b
|
|
//
|
|
if (block[0] != ">") {
|
|
var lines = block.split(/\n/),
|
|
prev = [],
|
|
line_no = block.lineNumber;
|
|
|
|
// keep shifting lines until you find a crotchet
|
|
while (lines.length && lines[0][0] != ">") {
|
|
prev.push(lines.shift());
|
|
line_no++;
|
|
}
|
|
|
|
var abutting = mk_block(prev.join("\n"), "\n", block.lineNumber);
|
|
jsonml.push.apply(jsonml, this.processBlock(abutting, []));
|
|
// reassemble new block of just block quotes!
|
|
block = mk_block(lines.join("\n"), block.trailing, line_no);
|
|
}
|
|
|
|
|
|
// if the next block is also a blockquote merge it in
|
|
while (next.length && next[0][0] == ">") {
|
|
var b = next.shift();
|
|
block = mk_block(block + block.trailing + b, b.trailing, block.lineNumber);
|
|
}
|
|
|
|
// Strip off the leading "> " and re-process as a block.
|
|
var input = block.replace(/^> ?/gm, ""),
|
|
old_tree = this.tree,
|
|
processedBlock = this.toTree(input, ["blockquote"]),
|
|
attr = extract_attr(processedBlock);
|
|
|
|
// If any link references were found get rid of them
|
|
if (attr && attr.references) {
|
|
delete attr.references;
|
|
// And then remove the attribute object if it's empty
|
|
if (isEmpty(attr)) {
|
|
processedBlock.splice(1, 1);
|
|
}
|
|
}
|
|
|
|
jsonml.push(processedBlock);
|
|
return jsonml;
|
|
},
|
|
|
|
referenceDefn: function referenceDefn(block, next) {
|
|
var re = /^\s*\[(.*?)\]:\s*(\S+)(?:\s+(?:(['"])(.*?)\3|\((.*?)\)))?\n?/;
|
|
// interesting matches are [ , ref_id, url, , title, title ]
|
|
|
|
if (!block.match(re))
|
|
return undefined;
|
|
|
|
// make an attribute node if it doesn't exist
|
|
if (!extract_attr(this.tree)) {
|
|
this.tree.splice(1, 0, {});
|
|
}
|
|
|
|
var attrs = extract_attr(this.tree);
|
|
|
|
// make a references hash if it doesn't exist
|
|
if (attrs.references === undefined) {
|
|
attrs.references = {};
|
|
}
|
|
|
|
var b = this.loop_re_over_block(re, block, function (m) {
|
|
|
|
if (m[2] && m[2][0] == "<" && m[2][m[2].length - 1] == ">")
|
|
m[2] = m[2].substring(1, m[2].length - 1);
|
|
|
|
var ref = attrs.references[m[1].toLowerCase()] = {
|
|
href: m[2]
|
|
};
|
|
|
|
if (m[4] !== undefined)
|
|
ref.title = m[4];
|
|
else if (m[5] !== undefined)
|
|
ref.title = m[5];
|
|
|
|
});
|
|
|
|
if (b.length)
|
|
next.unshift(mk_block(b, block.trailing));
|
|
|
|
return [];
|
|
},
|
|
|
|
para: function para(block, next) {
|
|
// everything's a para!
|
|
return [["para"].concat(this.processInline(block))];
|
|
}
|
|
}
|
|
};
|
|
|
|
Markdown.dialects.Gruber.inline = {
|
|
|
|
__oneElement__: function oneElement(text, patterns_or_re, previous_nodes) {
|
|
var m,
|
|
res,
|
|
lastIndex = 0;
|
|
|
|
patterns_or_re = patterns_or_re || this.dialect.inline.__patterns__;
|
|
var re = new RegExp("([\\s\\S]*?)(" + (patterns_or_re.source || patterns_or_re) + ")");
|
|
|
|
m = re.exec(text);
|
|
if (!m) {
|
|
// Just boring text
|
|
return [text.length, text];
|
|
} else if (m[1]) {
|
|
// Some un-interesting text matched. Return that first
|
|
return [m[1].length, m[1]];
|
|
}
|
|
|
|
var res;
|
|
if (m[2] in this.dialect.inline) {
|
|
res = this.dialect.inline[m[2]].call(
|
|
this,
|
|
text.substr(m.index), m, previous_nodes || []);
|
|
}
|
|
// Default for now to make dev easier. just slurp special and output it.
|
|
res = res || [m[2].length, m[2]];
|
|
return res;
|
|
},
|
|
|
|
__call__: function inline(text, patterns) {
|
|
|
|
var out = [],
|
|
res;
|
|
|
|
function add(x) {
|
|
//D:self.debug(" adding output", uneval(x));
|
|
if (typeof x == "string" && typeof out[out.length - 1] == "string")
|
|
out[out.length - 1] += x;
|
|
else
|
|
out.push(x);
|
|
}
|
|
|
|
while (text.length > 0) {
|
|
res = this.dialect.inline.__oneElement__.call(this, text, patterns, out);
|
|
text = text.substr(res.shift());
|
|
forEach(res, add)
|
|
}
|
|
|
|
return out;
|
|
},
|
|
|
|
// These characters are intersting elsewhere, so have rules for them so that
|
|
// chunks of plain text blocks don't include them
|
|
"]": function () {
|
|
},
|
|
"}": function () {
|
|
},
|
|
|
|
__escape__: /^\\[\\`\*_{}\[\]()#\+.!\-]/,
|
|
|
|
"\\": function escaped(text) {
|
|
// [ length of input processed, node/children to add... ]
|
|
// Only esacape: \ ` * _ { } [ ] ( ) # * + - . !
|
|
if (this.dialect.inline.__escape__.exec(text))
|
|
return [2, text.charAt(1)];
|
|
else
|
|
// Not an esacpe
|
|
return [1, "\\"];
|
|
},
|
|
|
|
"
|
|
// 1 2 3 4 <--- captures
|
|
var m = text.match(/^!\[(.*?)\][ \t]*\([ \t]*([^")]*?)(?:[ \t]+(["'])(.*?)\3)?[ \t]*\)/);
|
|
|
|
if (m) {
|
|
if (m[2] && m[2][0] == "<" && m[2][m[2].length - 1] == ">")
|
|
m[2] = m[2].substring(1, m[2].length - 1);
|
|
|
|
m[2] = this.dialect.inline.__call__.call(this, m[2], /\\/)[0];
|
|
|
|
var attrs = {alt: m[1], href: m[2] || ""};
|
|
if (m[4] !== undefined)
|
|
attrs.title = m[4];
|
|
|
|
return [m[0].length, ["img", attrs]];
|
|
}
|
|
|
|
// ![Alt text][id]
|
|
m = text.match(/^!\[(.*?)\][ \t]*\[(.*?)\]/);
|
|
|
|
if (m) {
|
|
// We can't check if the reference is known here as it likely wont be
|
|
// found till after. Check it in md tree->hmtl tree conversion
|
|
return [m[0].length, ["img_ref", {alt: m[1], ref: m[2].toLowerCase(), original: m[0]}]];
|
|
}
|
|
|
|
// Just consume the '!['
|
|
return [2, "!["];
|
|
},
|
|
|
|
"[": function link(text) {
|
|
|
|
var orig = String(text);
|
|
// Inline content is possible inside `link text`
|
|
var res = Markdown.DialectHelpers.inline_until_char.call(this, text.substr(1), "]");
|
|
|
|
// No closing ']' found. Just consume the [
|
|
if (!res) return [1, "["];
|
|
|
|
var consumed = 1 + res[0],
|
|
children = res[1],
|
|
link,
|
|
attrs;
|
|
|
|
// At this point the first [...] has been parsed. See what follows to find
|
|
// out which kind of link we are (reference or direct url)
|
|
text = text.substr(consumed);
|
|
|
|
// [link text](/path/to/img.jpg "Optional title")
|
|
// 1 2 3 <--- captures
|
|
// This will capture up to the last paren in the block. We then pull
|
|
// back based on if there a matching ones in the url
|
|
// ([here](/url/(test))
|
|
// The parens have to be balanced
|
|
var m = text.match(/^\s*\([ \t]*([^"']*)(?:[ \t]+(["'])(.*?)\2)?[ \t]*\)/);
|
|
if (m) {
|
|
var url = m[1];
|
|
consumed += m[0].length;
|
|
|
|
if (url && url[0] == "<" && url[url.length - 1] == ">")
|
|
url = url.substring(1, url.length - 1);
|
|
|
|
// If there is a title we don't have to worry about parens in the url
|
|
if (!m[3]) {
|
|
var open_parens = 1; // One open that isn't in the capture
|
|
for (var len = 0; len < url.length; len++) {
|
|
switch (url[len]) {
|
|
case "(":
|
|
open_parens++;
|
|
break;
|
|
case ")":
|
|
if (--open_parens == 0) {
|
|
consumed -= url.length - len;
|
|
url = url.substring(0, len);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
|
|
// Process escapes only
|
|
url = this.dialect.inline.__call__.call(this, url, /\\/)[0];
|
|
|
|
attrs = {href: url || ""};
|
|
if (m[3] !== undefined)
|
|
attrs.title = m[3];
|
|
|
|
link = ["link", attrs].concat(children);
|
|
return [consumed, link];
|
|
}
|
|
|
|
// [Alt text][id]
|
|
// [Alt text] [id]
|
|
m = text.match(/^\s*\[(.*?)\]/);
|
|
|
|
if (m) {
|
|
|
|
consumed += m[0].length;
|
|
|
|
// [links][] uses links as its reference
|
|
attrs = {ref: (m[1] || String(children)).toLowerCase(), original: orig.substr(0, consumed)};
|
|
|
|
link = ["link_ref", attrs].concat(children);
|
|
|
|
// We can't check if the reference is known here as it likely wont be
|
|
// found till after. Check it in md tree->hmtl tree conversion.
|
|
// Store the original so that conversion can revert if the ref isn't found.
|
|
return [consumed, link];
|
|
}
|
|
|
|
// [id]
|
|
// Only if id is plain (no formatting.)
|
|
if (children.length == 1 && typeof children[0] == "string") {
|
|
|
|
attrs = {ref: children[0].toLowerCase(), original: orig.substr(0, consumed)};
|
|
link = ["link_ref", attrs, children[0]];
|
|
return [consumed, link];
|
|
}
|
|
|
|
// Just consume the "["
|
|
return [1, "["];
|
|
},
|
|
|
|
|
|
"<": function autoLink(text) {
|
|
var m;
|
|
|
|
if ((m = text.match(/^<(?:((https?|ftp|mailto):[^>]+)|(.*?@.*?\.[a-zA-Z]+))>/)) != null) {
|
|
if (m[3]) {
|
|
return [m[0].length, ["link", {href: "mailto:" + m[3]}, m[3]]];
|
|
|
|
} else if (m[2] == "mailto") {
|
|
return [m[0].length, ["link", {href: m[1]}, m[1].substr("mailto:".length)]];
|
|
} else
|
|
return [m[0].length, ["link", {href: m[1]}, m[1]]];
|
|
}
|
|
|
|
return [1, "<"];
|
|
},
|
|
|
|
"`": function inlineCode(text) {
|
|
// Inline code block. as many backticks as you like to start it
|
|
// Always skip over the opening ticks.
|
|
var m = text.match(/(`+)(([\s\S]*?)\1)/);
|
|
|
|
if (m && m[2])
|
|
return [m[1].length + m[2].length, ["inlinecode", m[3]]];
|
|
else {
|
|
// TODO: No matching end code found - warn!
|
|
return [1, "`"];
|
|
}
|
|
},
|
|
|
|
" \n": function lineBreak(text) {
|
|
return [3, ["linebreak"]];
|
|
}
|
|
|
|
};
|
|
|
|
// Meta Helper/generator method for em and strong handling
|
|
function strong_em(tag, md) {
|
|
|
|
var state_slot = tag + "_state",
|
|
other_slot = tag == "strong" ? "em_state" : "strong_state";
|
|
|
|
function CloseTag(len) {
|
|
this.len_after = len;
|
|
this.name = "close_" + md;
|
|
}
|
|
|
|
return function (text, orig_match) {
|
|
|
|
if (this[state_slot][0] == md) {
|
|
// Most recent em is of this type
|
|
//D:this.debug("closing", md);
|
|
this[state_slot].shift();
|
|
|
|
// "Consume" everything to go back to the recrusion in the else-block below
|
|
return [text.length, new CloseTag(text.length - md.length)];
|
|
} else {
|
|
// Store a clone of the em/strong states
|
|
var other = this[other_slot].slice(),
|
|
state = this[state_slot].slice();
|
|
|
|
this[state_slot].unshift(md);
|
|
|
|
//D:this.debug_indent += " ";
|
|
|
|
// Recurse
|
|
var res = this.processInline(text.substr(md.length));
|
|
//D:this.debug_indent = this.debug_indent.substr(2);
|
|
|
|
var last = res[res.length - 1];
|
|
|
|
//D:this.debug("processInline from", tag + ": ", uneval( res ) );
|
|
|
|
var check = this[state_slot].shift();
|
|
if (last instanceof CloseTag) {
|
|
res.pop();
|
|
// We matched! Huzzah.
|
|
var consumed = text.length - last.len_after;
|
|
return [consumed, [tag].concat(res)];
|
|
} else {
|
|
// Restore the state of the other kind. We might have mistakenly closed it.
|
|
this[other_slot] = other;
|
|
this[state_slot] = state;
|
|
|
|
// We can't reuse the processed result as it could have wrong parsing contexts in it.
|
|
return [md.length, md];
|
|
}
|
|
}
|
|
}; // End returned function
|
|
}
|
|
|
|
Markdown.dialects.Gruber.inline["**"] = strong_em("strong", "**");
|
|
Markdown.dialects.Gruber.inline["__"] = strong_em("strong", "__");
|
|
Markdown.dialects.Gruber.inline["*"] = strong_em("em", "*");
|
|
Markdown.dialects.Gruber.inline["_"] = strong_em("em", "_");
|
|
|
|
|
|
// Build default order from insertion order.
|
|
Markdown.buildBlockOrder = function (d) {
|
|
var ord = [];
|
|
for (var i in d) {
|
|
if (i == "__order__" || i == "__call__") continue;
|
|
ord.push(i);
|
|
}
|
|
d.__order__ = ord;
|
|
};
|
|
|
|
// Build patterns for inline matcher
|
|
Markdown.buildInlinePatterns = function (d) {
|
|
var patterns = [];
|
|
|
|
for (var i in d) {
|
|
// __foo__ is reserved and not a pattern
|
|
if (i.match(/^__.*__$/)) continue;
|
|
var l = i.replace(/([\\.*+?|()\[\]{}])/g, "\\$1")
|
|
.replace(/\n/, "\\n");
|
|
patterns.push(i.length == 1 ? l : "(?:" + l + ")");
|
|
}
|
|
|
|
patterns = patterns.join("|");
|
|
d.__patterns__ = patterns;
|
|
//print("patterns:", uneval( patterns ) );
|
|
|
|
var fn = d.__call__;
|
|
d.__call__ = function (text, pattern) {
|
|
if (pattern != undefined) {
|
|
return fn.call(this, text, pattern);
|
|
} else {
|
|
return fn.call(this, text, patterns);
|
|
}
|
|
};
|
|
};
|
|
|
|
Markdown.DialectHelpers = {};
|
|
Markdown.DialectHelpers.inline_until_char = function (text, want) {
|
|
var consumed = 0,
|
|
nodes = [];
|
|
|
|
while (true) {
|
|
if (text.charAt(consumed) == want) {
|
|
// Found the character we were looking for
|
|
consumed++;
|
|
return [consumed, nodes];
|
|
}
|
|
|
|
if (consumed >= text.length) {
|
|
// No closing char found. Abort.
|
|
return null;
|
|
}
|
|
|
|
var res = this.dialect.inline.__oneElement__.call(this, text.substr(consumed));
|
|
consumed += res[0];
|
|
// Add any returned nodes.
|
|
nodes.push.apply(nodes, res.slice(1));
|
|
}
|
|
}
|
|
|
|
// Helper function to make sub-classing a dialect easier
|
|
Markdown.subclassDialect = function (d) {
|
|
function Block() {
|
|
}
|
|
|
|
Block.prototype = d.block;
|
|
|
|
function Inline() {
|
|
}
|
|
|
|
Inline.prototype = d.inline;
|
|
|
|
return {block: new Block(), inline: new Inline()};
|
|
};
|
|
|
|
Markdown.buildBlockOrder(Markdown.dialects.Gruber.block);
|
|
Markdown.buildInlinePatterns(Markdown.dialects.Gruber.inline);
|
|
|
|
Markdown.dialects.Maruku = Markdown.subclassDialect(Markdown.dialects.Gruber);
|
|
|
|
Markdown.dialects.Maruku.processMetaHash = function processMetaHash(meta_string) {
|
|
var meta = split_meta_hash(meta_string),
|
|
attr = {};
|
|
|
|
for (var i = 0; i < meta.length; ++i) {
|
|
// id: #foo
|
|
if (/^#/.test(meta[i])) {
|
|
attr.id = meta[i].substring(1);
|
|
}
|
|
// class: .foo
|
|
else if (/^\./.test(meta[i])) {
|
|
// if class already exists, append the new one
|
|
if (attr["class"]) {
|
|
attr["class"] = attr["class"] + meta[i].replace(/./, " ");
|
|
} else {
|
|
attr["class"] = meta[i].substring(1);
|
|
}
|
|
}
|
|
// attribute: foo=bar
|
|
else if (/\=/.test(meta[i])) {
|
|
var s = meta[i].split(/\=/);
|
|
attr[s[0]] = s[1];
|
|
}
|
|
}
|
|
|
|
return attr;
|
|
}
|
|
|
|
function split_meta_hash(meta_string) {
|
|
var meta = meta_string.split(""),
|
|
parts = [""],
|
|
in_quotes = false;
|
|
|
|
while (meta.length) {
|
|
var letter = meta.shift();
|
|
switch (letter) {
|
|
case " " :
|
|
// if we're in a quoted section, keep it
|
|
if (in_quotes) {
|
|
parts[parts.length - 1] += letter;
|
|
}
|
|
// otherwise make a new part
|
|
else {
|
|
parts.push("");
|
|
}
|
|
break;
|
|
case "'" :
|
|
case '"' :
|
|
// reverse the quotes and move straight on
|
|
in_quotes = !in_quotes;
|
|
break;
|
|
case "\\" :
|
|
// shift off the next letter to be used straight away.
|
|
// it was escaped so we'll keep it whatever it is
|
|
letter = meta.shift();
|
|
default :
|
|
parts[parts.length - 1] += letter;
|
|
break;
|
|
}
|
|
}
|
|
|
|
return parts;
|
|
}
|
|
|
|
Markdown.dialects.Maruku.block.document_meta = function document_meta(block, next) {
|
|
// we're only interested in the first block
|
|
if (block.lineNumber > 1) return undefined;
|
|
|
|
// document_meta blocks consist of one or more lines of `Key: Value\n`
|
|
if (!block.match(/^(?:\w+:.*\n)*\w+:.*$/)) return undefined;
|
|
|
|
// make an attribute node if it doesn't exist
|
|
if (!extract_attr(this.tree)) {
|
|
this.tree.splice(1, 0, {});
|
|
}
|
|
|
|
var pairs = block.split(/\n/);
|
|
for (p in pairs) {
|
|
var m = pairs[p].match(/(\w+):\s*(.*)$/),
|
|
key = m[1].toLowerCase(),
|
|
value = m[2];
|
|
|
|
this.tree[1][key] = value;
|
|
}
|
|
|
|
// document_meta produces no content!
|
|
return [];
|
|
};
|
|
|
|
Markdown.dialects.Maruku.block.block_meta = function block_meta(block, next) {
|
|
// check if the last line of the block is an meta hash
|
|
var m = block.match(/(^|\n) {0,3}\{:\s*((?:\\\}|[^\}])*)\s*\}$/);
|
|
if (!m) return undefined;
|
|
|
|
// process the meta hash
|
|
var attr = this.dialect.processMetaHash(m[2]);
|
|
|
|
var hash;
|
|
|
|
// if we matched ^ then we need to apply meta to the previous block
|
|
if (m[1] === "") {
|
|
var node = this.tree[this.tree.length - 1];
|
|
hash = extract_attr(node);
|
|
|
|
// if the node is a string (rather than JsonML), bail
|
|
if (typeof node === "string") return undefined;
|
|
|
|
// create the attribute hash if it doesn't exist
|
|
if (!hash) {
|
|
hash = {};
|
|
node.splice(1, 0, hash);
|
|
}
|
|
|
|
// add the attributes in
|
|
for (a in attr) {
|
|
hash[a] = attr[a];
|
|
}
|
|
|
|
// return nothing so the meta hash is removed
|
|
return [];
|
|
}
|
|
|
|
// pull the meta hash off the block and process what's left
|
|
var b = block.replace(/\n.*$/, ""),
|
|
result = this.processBlock(b, []);
|
|
|
|
// get or make the attributes hash
|
|
hash = extract_attr(result[0]);
|
|
if (!hash) {
|
|
hash = {};
|
|
result[0].splice(1, 0, hash);
|
|
}
|
|
|
|
// attach the attributes to the block
|
|
for (a in attr) {
|
|
hash[a] = attr[a];
|
|
}
|
|
|
|
return result;
|
|
};
|
|
|
|
Markdown.dialects.Maruku.block.definition_list = function definition_list(block, next) {
|
|
// one or more terms followed by one or more definitions, in a single block
|
|
var tight = /^((?:[^\s:].*\n)+):\s+([\s\S]+)$/,
|
|
list = ["dl"],
|
|
i, m;
|
|
|
|
// see if we're dealing with a tight or loose block
|
|
if ((m = block.match(tight))) {
|
|
// pull subsequent tight DL blocks out of `next`
|
|
var blocks = [block];
|
|
while (next.length && tight.exec(next[0])) {
|
|
blocks.push(next.shift());
|
|
}
|
|
|
|
for (var b = 0; b < blocks.length; ++b) {
|
|
var m = blocks[b].match(tight),
|
|
terms = m[1].replace(/\n$/, "").split(/\n/),
|
|
defns = m[2].split(/\n:\s+/);
|
|
|
|
// print( uneval( m ) );
|
|
|
|
for (i = 0; i < terms.length; ++i) {
|
|
list.push(["dt", terms[i]]);
|
|
}
|
|
|
|
for (i = 0; i < defns.length; ++i) {
|
|
// run inline processing over the definition
|
|
list.push(["dd"].concat(this.processInline(defns[i].replace(/(\n)\s+/, "$1"))));
|
|
}
|
|
}
|
|
} else {
|
|
return undefined;
|
|
}
|
|
|
|
return [list];
|
|
};
|
|
|
|
// splits on unescaped instances of @ch. If @ch is not a character the result
|
|
// can be unpredictable
|
|
|
|
Markdown.dialects.Maruku.block.table = function table(block, next) {
|
|
|
|
var _split_on_unescaped = function (s, ch) {
|
|
ch = ch || '\\s';
|
|
if (ch.match(/^[\\|\[\]{}?*.+^$]$/)) {
|
|
ch = '\\' + ch;
|
|
}
|
|
var res = [],
|
|
r = new RegExp('^((?:\\\\.|[^\\\\' + ch + '])*)' + ch + '(.*)'),
|
|
m;
|
|
while (m = s.match(r)) {
|
|
res.push(m[1]);
|
|
s = m[2];
|
|
}
|
|
res.push(s);
|
|
return res;
|
|
}
|
|
|
|
var leading_pipe = /^ {0,3}\|(.+)\n {0,3}\|\s*([\-:]+[\-| :]*)\n((?:\s*\|.*(?:\n|$))*)(?=\n|$)/,
|
|
// find at least an unescaped pipe in each line
|
|
no_leading_pipe = /^ {0,3}(\S(?:\\.|[^\\|])*\|.*)\n {0,3}([\-:]+\s*\|[\-| :]*)\n((?:(?:\\.|[^\\|])*\|.*(?:\n|$))*)(?=\n|$)/,
|
|
i, m;
|
|
if (m = block.match(leading_pipe)) {
|
|
// remove leading pipes in contents
|
|
// (header and horizontal rule already have the leading pipe left out)
|
|
m[3] = m[3].replace(/^\s*\|/gm, '');
|
|
} else if (!(m = block.match(no_leading_pipe))) {
|
|
return undefined;
|
|
}
|
|
|
|
var table = ["table", ["thead", ["tr"]], ["tbody"]];
|
|
|
|
// remove trailing pipes, then split on pipes
|
|
// (no escaped pipes are allowed in horizontal rule)
|
|
m[2] = m[2].replace(/\|\s*$/, '').split('|');
|
|
|
|
// process alignment
|
|
var html_attrs = [];
|
|
forEach(m[2], function (s) {
|
|
if (s.match(/^\s*-+:\s*$/)) html_attrs.push({align: "right"});
|
|
else if (s.match(/^\s*:-+\s*$/)) html_attrs.push({align: "left"});
|
|
else if (s.match(/^\s*:-+:\s*$/)) html_attrs.push({align: "center"});
|
|
else html_attrs.push({});
|
|
});
|
|
|
|
// now for the header, avoid escaped pipes
|
|
m[1] = _split_on_unescaped(m[1].replace(/\|\s*$/, ''), '|');
|
|
for (i = 0; i < m[1].length; i++) {
|
|
table[1][1].push(['th', html_attrs[i] || {}].concat(
|
|
this.processInline(m[1][i].trim())));
|
|
}
|
|
|
|
// now for body contents
|
|
forEach(m[3].replace(/\|\s*$/mg, '').split('\n'), function (row) {
|
|
var html_row = ['tr'];
|
|
row = _split_on_unescaped(row, '|');
|
|
for (i = 0; i < row.length; i++) {
|
|
html_row.push(['td', html_attrs[i] || {}].concat(this.processInline(row[i].trim())));
|
|
}
|
|
table[2].push(html_row);
|
|
}, this);
|
|
|
|
return [table];
|
|
}
|
|
|
|
Markdown.dialects.Maruku.inline["{:"] = function inline_meta(text, matches, out) {
|
|
if (!out.length) {
|
|
return [2, "{:"];
|
|
}
|
|
|
|
// get the preceeding element
|
|
var before = out[out.length - 1];
|
|
|
|
if (typeof before === "string") {
|
|
return [2, "{:"];
|
|
}
|
|
|
|
// match a meta hash
|
|
var m = text.match(/^\{:\s*((?:\\\}|[^\}])*)\s*\}/);
|
|
|
|
// no match, false alarm
|
|
if (!m) {
|
|
return [2, "{:"];
|
|
}
|
|
|
|
// attach the attributes to the preceeding element
|
|
var meta = this.dialect.processMetaHash(m[1]),
|
|
attr = extract_attr(before);
|
|
|
|
if (!attr) {
|
|
attr = {};
|
|
before.splice(1, 0, attr);
|
|
}
|
|
|
|
for (var k in meta) {
|
|
attr[k] = meta[k];
|
|
}
|
|
|
|
// cut out the string and replace it with nothing
|
|
return [m[0].length, ""];
|
|
};
|
|
|
|
Markdown.dialects.Maruku.inline.__escape__ = /^\\[\\`\*_{}\[\]()#\+.!\-|:]/;
|
|
|
|
Markdown.buildBlockOrder(Markdown.dialects.Maruku.block);
|
|
Markdown.buildInlinePatterns(Markdown.dialects.Maruku.inline);
|
|
|
|
var isArray = Array.isArray || function (obj) {
|
|
return Object.prototype.toString.call(obj) == "[object Array]";
|
|
};
|
|
|
|
var forEach;
|
|
// Don't mess with Array.prototype. Its not friendly
|
|
if (Array.prototype.forEach) {
|
|
forEach = function (arr, cb, thisp) {
|
|
return arr.forEach(cb, thisp);
|
|
};
|
|
} else {
|
|
forEach = function (arr, cb, thisp) {
|
|
for (var i = 0; i < arr.length; i++) {
|
|
cb.call(thisp || arr, arr[i], i, arr);
|
|
}
|
|
}
|
|
}
|
|
|
|
var isEmpty = function (obj) {
|
|
for (var key in obj) {
|
|
if (hasOwnProperty.call(obj, key)) {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
function extract_attr(jsonml) {
|
|
return isArray(jsonml)
|
|
&& jsonml.length > 1
|
|
&& typeof jsonml[1] === "object"
|
|
&& !(isArray(jsonml[1]))
|
|
? jsonml[1]
|
|
: undefined;
|
|
}
|
|
|
|
|
|
/**
|
|
* renderJsonML( jsonml[, options] ) -> String
|
|
* - jsonml (Array): JsonML array to render to XML
|
|
* - options (Object): options
|
|
*
|
|
* Converts the given JsonML into well-formed XML.
|
|
*
|
|
* The options currently understood are:
|
|
*
|
|
* - root (Boolean): wether or not the root node should be included in the
|
|
* output, or just its children. The default `false` is to not include the
|
|
* root itself.
|
|
*/
|
|
expose.renderJsonML = function (jsonml, options) {
|
|
options = options || {};
|
|
// include the root element in the rendered output?
|
|
options.root = options.root || false;
|
|
|
|
var content = [];
|
|
|
|
if (options.root) {
|
|
content.push(render_tree(jsonml));
|
|
} else {
|
|
jsonml.shift(); // get rid of the tag
|
|
if (jsonml.length && typeof jsonml[0] === "object" && !(jsonml[0] instanceof Array)) {
|
|
jsonml.shift(); // get rid of the attributes
|
|
}
|
|
|
|
while (jsonml.length) {
|
|
content.push(render_tree(jsonml.shift()));
|
|
}
|
|
}
|
|
|
|
return content.join("\n\n");
|
|
};
|
|
|
|
function escapeHTML(text) {
|
|
return text.replace(/&/g, "&")
|
|
.replace(/</g, "<")
|
|
.replace(/>/g, ">")
|
|
.replace(/"/g, """)
|
|
.replace(/'/g, "'");
|
|
}
|
|
|
|
function render_tree(jsonml) {
|
|
// basic case
|
|
if (typeof jsonml === "string") {
|
|
return escapeHTML(jsonml);
|
|
}
|
|
|
|
var tag = jsonml.shift(),
|
|
attributes = {},
|
|
content = [];
|
|
|
|
if (jsonml.length && typeof jsonml[0] === "object" && !(jsonml[0] instanceof Array)) {
|
|
attributes = jsonml.shift();
|
|
}
|
|
|
|
while (jsonml.length) {
|
|
content.push(render_tree(jsonml.shift()));
|
|
}
|
|
|
|
var tag_attrs = "";
|
|
for (var a in attributes) {
|
|
tag_attrs += " " + a + '="' + escapeHTML(attributes[a]) + '"';
|
|
}
|
|
|
|
// be careful about adding whitespace here for inline elements
|
|
if (tag == "img" || tag == "br" || tag == "hr") {
|
|
return "<" + tag + tag_attrs + "/>";
|
|
} else {
|
|
return "<" + tag + tag_attrs + ">" + content.join("") + "</" + tag + ">";
|
|
}
|
|
}
|
|
|
|
function convert_tree_to_html(tree, references, options) {
|
|
var i;
|
|
options = options || {};
|
|
|
|
// shallow clone
|
|
var jsonml = tree.slice(0);
|
|
|
|
if (typeof options.preprocessTreeNode === "function") {
|
|
jsonml = options.preprocessTreeNode(jsonml, references);
|
|
}
|
|
|
|
// Clone attributes if they exist
|
|
var attrs = extract_attr(jsonml);
|
|
if (attrs) {
|
|
jsonml[1] = {};
|
|
for (i in attrs) {
|
|
jsonml[1][i] = attrs[i];
|
|
}
|
|
attrs = jsonml[1];
|
|
}
|
|
|
|
// basic case
|
|
if (typeof jsonml === "string") {
|
|
return jsonml;
|
|
}
|
|
|
|
// convert this node
|
|
switch (jsonml[0]) {
|
|
case "header":
|
|
jsonml[0] = "h" + jsonml[1].level;
|
|
delete jsonml[1].level;
|
|
break;
|
|
case "bulletlist":
|
|
jsonml[0] = "ul";
|
|
break;
|
|
case "numberlist":
|
|
jsonml[0] = "ol";
|
|
break;
|
|
case "listitem":
|
|
jsonml[0] = "li";
|
|
break;
|
|
case "para":
|
|
jsonml[0] = "p";
|
|
break;
|
|
case "markdown":
|
|
jsonml[0] = "html";
|
|
if (attrs) delete attrs.references;
|
|
break;
|
|
case "code_block":
|
|
jsonml[0] = "pre";
|
|
i = attrs ? 2 : 1;
|
|
var code = ["code"];
|
|
code.push.apply(code, jsonml.splice(i, jsonml.length - i));
|
|
jsonml[i] = code;
|
|
break;
|
|
case "inlinecode":
|
|
jsonml[0] = "code";
|
|
break;
|
|
case "img":
|
|
jsonml[1].src = jsonml[1].href;
|
|
delete jsonml[1].href;
|
|
break;
|
|
case "linebreak":
|
|
jsonml[0] = "br";
|
|
break;
|
|
case "link":
|
|
jsonml[0] = "a";
|
|
break;
|
|
case "link_ref":
|
|
jsonml[0] = "a";
|
|
|
|
// grab this ref and clean up the attribute node
|
|
var ref = references[attrs.ref];
|
|
|
|
// if the reference exists, make the link
|
|
if (ref) {
|
|
delete attrs.ref;
|
|
|
|
// add in the href and title, if present
|
|
attrs.href = ref.href;
|
|
if (ref.title) {
|
|
attrs.title = ref.title;
|
|
}
|
|
|
|
// get rid of the unneeded original text
|
|
delete attrs.original;
|
|
}
|
|
// the reference doesn't exist, so revert to plain text
|
|
else {
|
|
return attrs.original;
|
|
}
|
|
break;
|
|
case "img_ref":
|
|
jsonml[0] = "img";
|
|
|
|
// grab this ref and clean up the attribute node
|
|
var ref = references[attrs.ref];
|
|
|
|
// if the reference exists, make the link
|
|
if (ref) {
|
|
delete attrs.ref;
|
|
|
|
// add in the href and title, if present
|
|
attrs.src = ref.href;
|
|
if (ref.title) {
|
|
attrs.title = ref.title;
|
|
}
|
|
|
|
// get rid of the unneeded original text
|
|
delete attrs.original;
|
|
}
|
|
// the reference doesn't exist, so revert to plain text
|
|
else {
|
|
return attrs.original;
|
|
}
|
|
break;
|
|
}
|
|
|
|
// convert all the children
|
|
i = 1;
|
|
|
|
// deal with the attribute node, if it exists
|
|
if (attrs) {
|
|
// if there are keys, skip over it
|
|
for (var key in jsonml[1]) {
|
|
i = 2;
|
|
break;
|
|
}
|
|
// if there aren't, remove it
|
|
if (i === 1) {
|
|
jsonml.splice(i, 1);
|
|
}
|
|
}
|
|
|
|
for (; i < jsonml.length; ++i) {
|
|
jsonml[i] = convert_tree_to_html(jsonml[i], references, options);
|
|
}
|
|
|
|
return jsonml;
|
|
}
|
|
|
|
|
|
// merges adjacent text nodes into a single node
|
|
function merge_text_nodes(jsonml) {
|
|
// skip the tag name and attribute hash
|
|
var i = extract_attr(jsonml) ? 2 : 1;
|
|
|
|
while (i < jsonml.length) {
|
|
// if it's a string check the next item too
|
|
if (typeof jsonml[i] === "string") {
|
|
if (i + 1 < jsonml.length && typeof jsonml[i + 1] === "string") {
|
|
// merge the second string into the first and remove it
|
|
jsonml[i] += jsonml.splice(i + 1, 1)[0];
|
|
} else {
|
|
++i;
|
|
}
|
|
}
|
|
// if it's not a string recurse
|
|
else {
|
|
merge_text_nodes(jsonml[i]);
|
|
++i;
|
|
}
|
|
}
|
|
}
|
|
|
|
})((function () {
|
|
if (typeof exports === "undefined") {
|
|
window.markdown = {};
|
|
return window.markdown;
|
|
} else {
|
|
return exports;
|
|
}
|
|
})());
|